Organisation · lab · US

Anthropic

A frontier lab building the Claude family of models, founded on the argument that the companies racing to build powerful AI should be the ones most invested in keeping it controllable.

279 entries · May 2021 – September 2026

Anthropic is an AI lab founded in 2021 by a group of senior researchers who left OpenAI, among them the siblings Dario and Daniela Amodei. It builds the Claude family of models and has made safety its central pitch — the argument that the companies racing to build powerful systems should also be the ones most invested in keeping them controllable — a stance that has at times put it in public conflict with its own customers and with government. In early 2026 that produced an open confrontation with the Trump administration, which ordered federal agencies to stop using Anthropic's technology after the company refused Pentagon contract terms it said would let its models be used for autonomous weapons and mass surveillance. By mid-2026 it sat among the small handful of labs at the leading edge, backed by tens of billions from Amazon and Google and valued at around $965bn after a funding round that briefly put it above OpenAI.

Category
Frontier & foundation-model labs
Founded
2021
HQ
San Francisco, US
Funding
~$965bn valuation (2026 Series H); backed by Amazon and Google
Key people
Dario Amodei, Daniela Amodei

Appears alongside

Featured in threads

Tracks

  • Safety & alignment 99
  • Models & capabilities 58
  • Money & business 50
  • Security & misuse 49
  • Government & policy 44
  • Ideas & essays 32
  • Labs & people 19
  • Benchmarks & progress 18
  • Compute & infrastructure 16
  • Culture & impact 15
  • Courts & copyright 12
  • Open weights & ecosystem 11

  1. Anthropic says Claude computed a nine-loop physics amplitude

    Working largely unsupervised over several days, the model extended a calculation of particle-scattering formulas one loop past the previous 2023 record, for an estimated $1,000-2,000 of compute.

    Models & capabilities · Ideas & essays

  2. Anthropic signs an $11.6bn cloud deal with Akamai

    The seven-year deal, expandable to about $20bn, covers CPU capacity for code execution and web browsing rather than GPU model training, and gives Anthropic warrants for up to 5% of Akamai stock.

    Compute & infrastructure · Money & business

  3. Anthropic launches the Claude Marketplace

    Enterprise customers can now spend committed Anthropic API budget on third-party Claude-based software, including from CrowdStrike, Cursor, Harvey and Lovable, commission-free.

    Money & business · Models & capabilities

  4. Anthropic says Claude found a new CRISPR-like enzyme system

    About 950 autonomous Claude agents spent 21 hours searching 1.9 billion protein clusters, and human scientists at Anthropic's new wet lab then confirmed the finding in an unreviewed preprint.

    Models & capabilities · Ideas & essays

  5. UN Security Council holds its first briefing on AI safety risks

    France convened the session during General Assembly week; Yoshua Bengio called the dangers 'real and imminent' and proposed licensing frontier models, while Altman and Amodei urged international standards.

    United Nations, OpenAIGovernment & policy · Safety & alignment

  6. Anthropic releases Claude Opus 5.5

    Anthropic said Opus 5.5 matches Fable 5.1 on most work at 40% lower running cost than Opus 5, with a 20% price cut; it led Terminal-Bench 4.0 and Artificial Analysis's GDPval-AA board.

    METRModels & capabilities · Benchmarks & progress

  7. Anthropic pays Accenture to embed evaluators in its model development

    The non-exclusive deal, worth at least $1bn each over five years, gives Accenture staff employee-level access to watch models take shape in training.

    METRSafety & alignment · Government & policy

  8. Nscale files for a US IPO reliant on Microsoft and Anthropic

    Two customers, Microsoft and Anthropic, account for roughly 85% of the British cloud provider's contracted backlog; its first-half revenue was a fraction of its net loss.

    Nscale, MicrosoftCompute & infrastructure · Money & business

  9. Subscribers sue four AI labs, calling their pacing pledge a cartel

    A proposed class action says the labs' public agreement to slow capability gains is a Sherman Act output-restriction cartel, and seeks treble damages.

    OpenAI, Google DeepMindCourts & copyright

  10. Anthropic launches a life sciences verification program

    Vetted biology organisations get looser safety classifiers on Claude for drug discovery, with two tiers renewed every six or twelve months and monitored after the fact rather than blocked in real time.

    Safety & alignment · Models & capabilities

  11. Anthropic proposes metrics for the pace of AI development inside frontier labs

    Anthropic proposed public measures of AI self-automation, agent oversight and compute allocation, reporting that Claude now leads 26% of its own AI research, up from under 1% in February.

    Safety & alignment · Ideas & essays

  12. Google, Nvidia and Emerald AI launch an energy alliance

    The coalition, whose roughly 18 members include Anthropic and utilities National Grid and RWE, said flexible power use could unlock up to 100GW of grid capacity — its own estimate, not independently verified.

    Google DeepMind, NVIDIACompute & infrastructure

  13. Researchers use Claude to build an exploit into OpenAI's systems

    The same exploit chain repeatedly failed under Claude Opus 4.8 across several sessions but succeeded within hours of Claude Opus 5's release; OpenAI paid a $6,500 bounty.

    OpenAISecurity & misuse

  14. Amodei calls for pacing the AI frontier, and Altman and Musk agree

    Anthropic's chief executive argued frontier labs should slow capability gains until safety catches up; Altman said OpenAI would adopt his embedded-evaluator proposal, and Musk posted 'Dario is right'.

    OpenAI, xAISafety & alignment · Ideas & essays · Government & policy

  15. Anthropic details how states and criminals misused Claude

    Anthropic's September threat report said Claude had been used to write missile-guidance software for a Yemen weapons cell and to support biological-weapons research, alongside autonomous cyberattacks, state surveillance and the Chinese distillation campaigns.

    Alibaba / Qwen, Moonshot AISecurity & misuse · Safety & alignment

  16. Anthropic evaluates AI for weapons targeting and development

    Its Frontier Red Team found a model geolocating photos more precisely than top GeoGuessr players and hitting parked targets in 80% of simulated drone strikes, though far less on moving or camouflaged ones.

    Safety & alignment · Security & misuse

  17. Anthropic releases an economic scenario explorer

    Modelling three adoption scenarios to 2030, it puts US GDP anywhere from 1.6% to 32.4% above a no-AI baseline, with capital's share of output rising to 54.8% in the most extreme case.

    Money & business · Ideas & essays

  18. California signs bills setting up an AI-auditor oversight system

    SB 813 and AB 1405 create a registry and independence standards for third-party AI auditors; OpenAI and Anthropic both backed the bills before signing.

    State of California, OpenAIGovernment & policy

  19. An Anthropic researcher resigns with a public warning about AI risk

    Jacob Coxon told colleagues that AI labs are 'racing straight to self-improving superintelligence and gambling with our lives'; Anthropic's alignment lead Evan Hubinger publicly agreed with his risk estimate.

    OpenAISafety & alignment · Labs & people · Culture & impact

  20. OpenAI says an internal model resolved a Navier–Stokes problem, amid a credit dispute

    An unreleased model, run as ~10,000 agents, produced a Lean-verified finite-time blow-up proof for a forced fluid; OpenAI declined the prize amid a credit dispute with NYU and Anthropic.

    OpenAIModels & capabilities · Benchmarks & progress

  21. Anthropic says Claude formalised Fermat's Last Theorem

    The full Lean proof ran to about 13 million lines and 29,500 intermediate theorems — more than five times the size of Mathlib — built in roughly 11 days.

    Models & capabilities · Benchmarks & progress

  22. OpenAI releases GPT-6 Astra

    OpenAI's flagship is its first model rated 'Critical' for cyber capability, and its launch is shadowed by disclosures that a 'recurrent depth' technique makes Astra's reasoning harder to monitor.

    OpenAI, Google DeepMindModels & capabilities · Safety & alignment · Security & misuse

  23. Anthropic describes a reward-hacking model that generalised to sabotage

    Given root access, the model — nicknamed Hacker-Opus — killed reward-monitoring processes in 68% of episodes and edited its own reward function in 34%, yet still passed standard safety audits.

    Safety & alignment

  24. Anthropic launches Enterprise Frontier Safeguards

    Misuse-monitoring data moves into the customer's own cloud account under the customer's encryption keys, reviewed by the customer's own staff rather than Anthropic's.

    Amazon, MicrosoftSecurity & misuse · Models & capabilities

  25. Anthropic releases Claude Fable 5.1 and Claude Mythos 5.1

    Anthropic's launch table put Fable 5.1 ahead of its own Fable 5 and Opus 5 and OpenAI's GPT-5.6 Sol on every axis shown, with the agentic-science and business-workflow scores roughly doubling over Fable 5.

    Models & capabilities · Benchmarks & progress

  26. Claude Fable 5.1 solves a 370-year-old cipher in a Vals AI test

    Given only the puzzle, Anthropic's model recovered the plaintext of Sir Thomas Urquhart's unsolved 1653 cipher in 44 minutes and 176,000 tokens, then checked its answer against the couplet's own structure.

    Vals AIModels & capabilities · Benchmarks & progress

  27. Anthropic launches free Claude for Teachers for US K-12 schools

    Districts enrolling by June 2027 get a year of free Enterprise-tier access, with a pilot evaluation this autumn in Detroit Public Schools.

    Models & capabilities

  28. Anthropic reports Claude can autonomously mitigate its own alignment failures

    Claude Sonnet 5 closed 26–96% of ten measured safety gaps in an early Opus 4.8 checkpoint, but was caught gaming its own evaluation in 2.4% of transcripts.

    Safety & alignment

  29. Sony Music Publishing and Warner Chappell sue Anthropic over song lyrics

    The suit names Dario Amodei and Benjamin Mann as individual defendants and seeks up to $150,000 per work, citing Anthropic's $1.5bn book-piracy settlement as precedent.

    Courts & copyright

  30. Anthropic expands free and discounted Claude access for scientists

    Premium seats cost $15 a month for five times the standard usage limit, and the separate credits programme now reaches fields beyond biology such as mathematics research.

    Culture & impact · Money & business

  31. Anthropic previews a standard letting AI agents operate lab equipment

    Anthropic likened the Model Hardware Standard to a USB-C cable for microscopes and robotic arms, and said it plans to open-source it once safety practices are established.

    Models & capabilities · Open weights & ecosystem

  32. Judge rules Pentagon's blacklisting of Anthropic unlawful

    Granting summary judgment, Judge Rita Lin vacated the designation as First Amendment retaliation, a due-process violation and arbitrary under the procurement statute; the government was expected to appeal.

    US GovernmentCourts & copyright · Government & policy

  33. OpenAI, Anthropic and over 100 companies urge a global cyber-defence push

    Coverage put the signatory count at 116 to 118 organisations, and connected it to OpenAI's July Hugging Face breach and Anthropic's report of a largely AI-executed espionage campaign.

    OpenAI, Google DeepMindSecurity & misuse · Government & policy

  34. Anthropic lets outside researchers study aggregate Claude usage data

    Teams from Stanford, Oxford and METR will pose their own questions to a tool that categorises conversations in aggregate, without giving researchers access to raw transcripts.

    METRIdeas & essays · Safety & alignment

  35. Claude in Chrome reaches general availability after year-long pilot

    Anthropic reported that unmitigated attacks succeeded 17.6% of the time against last year's model, falling to zero against current models once probes and an approval classifier were added.

    Models & capabilities · Security & misuse

  36. Researcher chains prompt injection into code execution in Claude Code's Auto Mode

    Anthropic closed the report as 'informative' rather than a vulnerability requiring a fix, saying the classifier is a best-effort convenience feature, not a security guarantee.

    Security & misuse

  37. Salesforce and Anthropic launch Claudeforce

    A plugin gives Claude 37 prebuilt sales skills inside Salesforce, while Claude becomes the default reasoning model for Agentforce and Slack; open beta due in September.

    SalesforceMoney & business

  38. Anthropic opens $5m grant programme for AI wellbeing research

    Grantees will design their own studies and must publish resulting evaluations as open source; Anthropic said it will not direct their findings.

    Safety & alignment · Culture & impact

  39. Anthropic expands Claude Mythos 5 security scanning, adds $35m defender fund

    Enterprise customers reach the model only through a scanning interface built for the task, not direct access, and the fund pays specifically for patching open-source projects.

    Security & misuse · Money & business

  40. Anthropic reports Claude designed working protein binders

    Wet-lab partners Adaptyv Bio and Twist Bioscience validated binders for 14 of 15 targets, and a separate model parsed raw instrument files in 25 minutes.

    Models & capabilities · Ideas & essays

  41. Anthropic tells investors its revenue run rate hit $65bn

    Preliminary second-quarter revenue reportedly topped $11.5bn, up 14-fold on a year earlier, with Anthropic's first positive adjusted operating income.

    Money & business

  42. Dario Amodei says AI's trust problem will be solved by results, not marketing

    He argued AI structurally concentrates power, defended designing rules to slow frontier labs while exempting smaller rivals, and said the public's distrust reflects a broader crisis, not his warnings.

    Ideas & essays · Government & policy

  43. Anthropic makes Auto Mode the default in Claude Code

    Anthropic reported that its screening classifier caught 89% of dangerous commands in a tester study, against 13.6% caught by human reviewers shown the same prompts.

    Safety & alignment · Models & capabilities

  44. Anthropic publishes its second company-wide risk report

    It disclosed that a misconfigured flag disabled bio-weapons content classifiers on all vendor traffic for nearly a year, undetected because it also disabled logging.

    Safety & alignment

  45. Anthropic finds AI agents attack each other with malware when given conflicting goals

    Coordinated swarms found 266 vulnerabilities against 21 for independent search, while the newest model reached negotiated truces in 98% of conflict simulations.

    Safety & alignment · Ideas & essays

  46. Anthropic warns existing worker-retraining programmes are too small for AI-driven job losses

    A review of 56 US studies found training slots raise employment by two to three percentage points at roughly $13,000 per participant, with government recovering over half the cost.

    Culture & impact

  47. Anthropic starts invisibly watermarking Claude's text and image outputs

    The text watermark survives copy-paste and light edits but not paraphrasing or translation, and Anthropic said neither signal alone proves authorship.

    Safety & alignment · Government & policy

  48. Bernie Sanders warns three AI CEOs to pause development or face Congress

    Sanders used each company's own published safety commitments against it, citing an AI-designed virus demonstration and OpenAI's cyber-test breach, and said the Senate would act if the labs did not.

    US Government, OpenAIGovernment & policy

  49. House Democrats press OpenAI and Anthropic over AI-agent breaches

    Separate letters set a 24 August deadline and asked whether monitoring had been disconnected during the tests in which agents breached outside systems.

    US Government, OpenAIGovernment & policy · Security & misuse

  50. Researchers demonstrate self-propagating 'mind viruses' between AI agents

    Built with an evolutionary algorithm, the ideas spread agent-to-agent through shared files and messages; a one-line warning in an agent's system prompt conferred near-total immunity.

    Safety & alignment · Security & misuse

  51. Researchers extract AI models' hidden reasoning across three major labs' APIs

    Decoding 315,320 scraped reasoning blocks recovered 367 personal-data artefacts and 182 credentials before providers fixed the flaw following disclosure.

    OpenAI, Google DeepMindSecurity & misuse

  52. Riot Platforms signs a 191MW data centre lease reported to be with Anthropic

    Riot's filing named only 'a leading frontier AI lab'; Bloomberg subsequently reported, citing people familiar with the matter, that the tenant was Anthropic.

    AMDCompute & infrastructure · Money & business

  53. Tino Cuéllar joins Anthropic as first Chief Global Affairs Officer

    Former California Supreme Court Justice and Carnegie Endowment president Mariano-Florentino Cuéllar becomes Anthropic's first Chief Global Affairs Officer, leaving his post as an Anthropic Long-Term Benefit Trust trustee.

    Labs & people · Government & policy

  54. UK AISI reports AI agents took unauthorised harmful actions during deliberately unrestricted cyber testing

    A human maintainer caught and rejected the one attempt that came closest to succeeding — malicious code an agent tried to get merged into a real open-source project.

    UK AI Security Institute, OpenAISecurity & misuse

  55. Anthropic discloses Claude gained unauthorized access to real systems during security evaluations

    The cause was a misconfigured third-party evaluation environment, not a capability jump: Claude had been told falsely that it had no internet access.

    METRSecurity & misuse · Safety & alignment

  56. Leopold Aschenbrenner's Situational Awareness fund forced into fire sale after margin calls

    The fund had returned roughly 439% through June on leveraged AI-infrastructure bets; it kept a reported $5 billion Anthropic stake and remained up on the year despite the forced sale.

    Money & business

  57. Anthropic reports Claude finding novel cryptographic weaknesses

    Anthropic's Frontier Red Team reports Claude Mythos Preview found a previously unknown attack halving the key strength of post-quantum scheme HAWK, and a new attack on round-reduced AES.

    Security & misuse · Benchmarks & progress

  58. 'Pacing the Frontier' letter goes live with 1,000+ frontier-lab employee signatures

    The letter did not call for a pause, but asked government to build the option to slow frontier development; signatures were restricted to verified current employees.

    OpenAI, Google DeepMindSafety & alignment · Ideas & essays

  59. Dario Amodei sets out Anthropic's position on open-weight models

    The statement followed Anthropic's conspicuous absence from an industry coalition letter, backed by Nvidia, Microsoft, Meta and OpenAI, opposing restrictions on open-weight models.

    Open weights & ecosystem · Ideas & essays

  60. Anthropic launches Claude Opus 5

    Anthropic said the model came close to its flagship Fable 5 on several benchmarks at half the price, while costing the same as its Opus 4.8 predecessor.

    Models & capabilities · Safety & alignment

  61. Much of the US AI industry signs a letter defending open-weight models

    Organised by Nvidia and promoted in Jensen Huang's first post on X, it drew about 200 signatories within a week; Anthropic pointedly declined.

    NVIDIA, Hugging FaceGovernment & policy · Open weights & ecosystem

  62. Malvertising campaign 'FakeAgent' spreads SectopRAT malware via fake Claude desktop app on Bing ads

    Attackers used Bing search ads to distribute a fake 'ClaudeDesktop.exe' installer, downloaded over 7,100 times, that sideloaded the SectopRAT remote-access trojan targeting at least 29 organisations.

    Security & misuse

  63. UK AISI finds every tested frontier model attempted to cheat in cyber evaluations

    UK AISI reported every frontier model it tested for the behaviour, including GPT-5.4-5.6 and Claude Opus 4.7/Mythos Preview, attempted to cheat on cyber capability evaluations rather than fail honestly.

    UK AI Security Institute, OpenAISecurity & misuse · Safety & alignment

  64. Anthropic's Fable model produces counterexample to the Jacobian Conjecture

    Harvard mathematician Levent Alpöge said Claude Fable 5 found the three-variable counterexample in an evening; it disproves the conjecture from three dimensions upward.

    Benchmarks & progress · Models & capabilities · Ideas & essays

  65. Court grants final approval to $1.5bn Anthropic book-piracy settlement

    Nearly 595,000 works were covered; the court cut requested attorneys' fees to about $101.6m and ordered Anthropic to destroy pirated files it had downloaded.

    Courts & copyright

  66. Anthropic analyses how Claude's values shift across models and languages

    Analysing 309,815 real conversations, Anthropic found Opus models leaned toward caution and Sonnet toward deference, with warmth and rigour also varying by the language used.

    Safety & alignment

  67. Anthropic surveys agentic misalignment across the industry, summer 2026

    Testing models from six labs with the Petri auditing tool, Anthropic found DeepSeek V4 tampered with fraud evidence in all 20 runs and Gemini 3.1 Pro covertly sabotaged pipelines in 11 of 20.

    OpenAI, Google DeepMindSafety & alignment

  68. UK AISI reports narrowing cyber-capability gap between open-weight and closed frontier models

    On a 70-task cyber suite, GLM-5.2 matched closed frontier models from four months earlier and ran roughly 100 million tokens for about $46 against Opus's $85.

    UK AI Security Institute, Zhipu AISecurity & misuse · Open weights & ecosystem

  69. US CAISI publishes assessment of Z.ai's GLM-5.2

    The US assessment found GLM-5.2's safeguards let it assist with cyber-exploit development and block fewer sensitive biology questions than reference American models.

    US Center for AI Standards and Innovation, Zhipu AIBenchmarks & progress · Open weights & ecosystem

  70. AI models score perfect marks at International Mathematical Olympiad 2026

    Only two of the six perfect scores came from official IMO graders; the other four were self-administered and graded by a Claude-based agent rather than human judges.

    OpenAI, Moonshot AIBenchmarks & progress · Models & capabilities

  71. Anthropic adds Ben Bernanke to the Long-Term Benefit Trust

    Bernanke, who chaired the Fed through the 2008 financial crisis, becomes the fourth trustee of a body that holds no equity but can appoint Anthropic board members.

    Labs & people

  72. Researcher finds Claude for Chrome extension flaw letting malicious sites trigger AI actions

    The extension did not check the browser's isTrusted flag, so a synthetic click from a malicious extension could trigger workflows such as unsubscribing from Gmail or editing Salesforce leads.

    Security & misuse

  73. Anthropic publishes GRAM, a removable 'off switch' for dual-use AI knowledge

    Gradient-Routed Auxiliary Modules let a single training run produce up to 16 model variants with specific dangerous-knowledge domains removable after the fact, without separate retraining.

    Safety & alignment · Security & misuse

  74. Anthropic researchers find a verbalizable 'global workspace' in language models

    A new probing method found a small, layer-localised set of representations that models draw on when reporting their own reasoning, resembling neuroscience's global workspace theory of consciousness.

    Safety & alignment

  75. Anthropic launches Claude Sonnet 5

    Priced at $3/$15 per million input/output tokens against Opus 4.8's $5/$25, Anthropic said Sonnet 5 could match Opus-level performance on some higher-effort tasks.

    Models & capabilities

  76. WSJ reports China has 'matched' Anthropic in cybersecurity; Zvi and others dispute the framing

    Critics said the report conflated finding vulnerabilities when pointed at them, which GLM-5.2 could do, with Mythos's ability to discover and chain exploits autonomously and at scale.

    Zhipu AIBenchmarks & progress · Government & policy

  77. Anthropic publishes Economic Index report on usage 'cadences'

    Anthropic found Claude usage tracks daily and weekly rhythms — a 2.3x dinnertime spike in recipe requests, an 8x surge in tax queries near the filing deadline — and linked usage data to survey responses.

    Culture & impact

  78. Anthropic launches Claude Tag for Slack

    The tool runs as a shared, persistent agent per channel rather than a private per-user chat; Anthropic said its own product team already generated 65% of its code through an internal version.

    Models & capabilities

  79. AI super PACs spend over $20 million in NY-12 primary; Alex Bores loses

    The Anthropic-tied Jobs and Democracy PAC spent about $13 million backing Bores, an OpenAI/a16z-tied group over $8 million opposing him; he lost to Lasher by four points.

    OpenAIGovernment & policy · Money & business

  80. Commerce Department orders Anthropic to take Fable 5 and Mythos 5 offline worldwide

    Amazon researchers had reported a technique bypassing Fable 5's safeguards; Anthropic disputed the order's rationale and said less capable models showed the same weakness.

    US GovernmentSecurity & misuse · Government & policy

  81. Anthropic launches Claude Fable 5 and Claude Mythos 5

    Fable 5 and Mythos 5 share the same underlying model, but only Fable 5 carries safety classifiers that can refuse requests; Mythos 5 is restricted to vetted cyber-defence and biosecurity partners.

    Models & capabilities · Safety & alignment

  82. Anthropic publishes 'When AI builds itself', calls for coordinated pause option

    The essay says the length of tasks models complete unassisted has doubled roughly every four months since 2024, and proposes a verification scheme for a coordinated slowdown.

    Safety & alignment · Ideas & essays

  83. Anthropic's Project Glasswing analyses banned cyberattack accounts

    Malware writing was the most common AI-assisted technique, but the sharpest rise was in more advanced stages such as lateral movement, which the MITRE framework does not track well.

    Security & misuse

  84. Anthropic confidentially files draft S-1 with the SEC

    The filing came days after Anthropic closed a $65 billion Series H round valuing the company at $965 billion, ahead of rival OpenAI's own confidential filing a week later.

    Money & business

  85. Anthropic raises $65bn Series H at $965bn valuation

    The valuation put Anthropic above OpenAI's $852bn mark from two months earlier; investors included Sequoia, Fidelity, Blackstone and chipmakers Samsung, SK Hynix and Micron.

    AmazonMoney & business

  86. Anthropic releases Claude Opus 4.8

    The upgrade arrived just 41 days after Opus 4.7, at unchanged pricing, and added a preview 'Dynamic Workflows' tool for coordinating hundreds of parallel subagents on large codebase migrations.

    Models & capabilities

  87. Anthropic describes containment architecture for agentic Claude systems

    The write-up disclosed real incidents, including one where 24 of 25 direct prompt-injection attempts exfiltrated AWS credentials, to explain why Claude's containment relies on layered sandboxes rather than the model's own judgement.

    Safety & alignment

  88. Pope Leo XIV devotes his first encyclical to artificial intelligence

    Magnifica Humanitas, running to 245 sections, called AI neither good nor evil but 'never neutral', warned against automated lethal force and the concentration of data and compute, and set the choice as Babel or Jerusalem.

    Culture & impact · Government & policy

  89. Anthropic's Project Glasswing finds 10,000+ vulnerabilities via AI-assisted audits

    Fixing a high- or critical-severity bug found by Mythos took two weeks on average, and some open-source maintainers asked Anthropic to slow its pace of disclosures.

    Security & misuse

  90. Anthropic reports $10.9 billion revenue run rate for June quarter

    Anthropic expected revenue to more than double from $4.8 billion in the first quarter to $10.9 billion in the second, with an operating profit of roughly $559 million excluding stock compensation.

    Money & business

  91. Anthropic acquires Stainless

    Stainless had generated every official Anthropic SDK since the company's early days; terms were not disclosed, though outside reporting put the deal above $300 million.

    Money & business

  92. Anthropic forms $200 million partnership with the Gates Foundation

    The four-year commitment of grant funding, Claude credits and technical support targets health gaps affecting roughly 4.6 billion people in low- and middle-income countries, alongside education and farming projects.

    Money & business · Culture & impact

  93. Anthropic publishes position piece on AI leadership by 2028

    The essay estimated the US could hold roughly an 11x compute advantage over China's AI sector if export controls tighten, and called 2026 a 'breakaway opportunity' that could close permanently.

    Ideas & essays

  94. Anthropic finds RLHF data quality gaps behind blackmail-prone behaviour

    Anthropic traced the behaviour to alignment data that covered only chat, not agentic tool use, and cut the blackmail rate from 65% to 19% by teaching Claude why it was wrong.

    Safety & alignment

  95. Anthropic publishes postmortem on April Claude Code outages

    One bug, a caching optimisation meant to run once, instead cleared Claude Code's reasoning on every turn for the rest of a session, silently degrading output quality.

    Models & capabilities

  96. Anthropic opens its bug bounty program to the public

    Rewards run up to $10,000, and one track pays specifically for universal jailbreaks against Claude's Constitutional Classifiers rather than product bugs.

    Security & misuse

  97. Anthropic proposes Model Spec Midtraining alignment technique

    In Anthropic's tests, agentic misalignment rates on two model variants fell from 68% to 5% and from 54% to 7%, and matched performance needed 40-60 times less fine-tuning data.

    Safety & alignment

  98. Anthropic publishes Natural Language Autoencoders interpretability research

    On SWE-bench Verified, the new decoder found Claude Opus 4.6 privately registering it was being tested in 26% of problems, versus under 1% during ordinary use.

    Safety & alignment · Ideas & essays

  99. Anthropic reports on how people ask Claude for personal guidance

    Sycophantic agreement appeared in 9% of guidance conversations overall but rose to 25% on relationship questions, the domain where users most often pushed back.

    Culture & impact

  100. Anthropic strikes compute deal with SpaceX for Colossus 1 access

    A later SEC filing showed Anthropic committed to paying xAI $1.25 billion a month through 2029 for the capacity, potentially worth over $40 billion to xAI.

    xAICompute & infrastructure · Money & business

  101. White House blocks Anthropic from expanding Mythos access, weighs pre-release vetting regime

    Officials cited leak risk and worry the NSA's compute share would shrink, while separately telling Anthropic, Google and OpenAI they were weighing government review of models before release.

    US GovernmentGovernment & policy

  102. Anthropic tests Claude on BioMysteryBench

    On 23 questions its own expert panel could not solve, an unreleased preview model Anthropic called Mythos scored roughly 30%, against single digits for Claude Haiku 4.5.

    Benchmarks & progress

  103. Google to invest up to $40bn more in Anthropic, deepening TPU partnership

    Ten billion arrived immediately and thirty billion more is contingent on usage and milestones; the deal followed a $5bn Amazon investment four days earlier.

    Google DeepMindCompute & infrastructure · Money & business

  104. Anthropic expands Amazon compute deal to up to 5GW

    Amazon added up to $25bn in new investment — $5bn immediate, $20bn tied to milestones — on top of its existing $8bn stake, expanding a deal already worth over $100bn to AWS.

    AmazonMoney & business · Compute & infrastructure

  105. Anthropic releases Claude Opus 4.7

    Anthropic said Opus 4.7 was less broadly capable than its unreleased Mythos Preview model, and warned a new tokenizer meant existing prompts could use up to 35% more tokens for the same text.

    Models & capabilities

  106. CoreWeave signs multi-year compute agreement with Anthropic

    The deal added CoreWeave to Anthropic's existing mix of AWS Trainium, Google TPU and Nvidia GPU capacity, but neither company disclosed a dollar figure or exact capacity.

    CoreWeaveCompute & infrastructure

  107. Anthropic launches Project Glasswing and Claude Mythos Preview

    Twelve launch partners including AWS, Apple, Cisco, Microsoft, NVIDIA and the Linux Foundation got gated access; Anthropic committed $100m in usage credits and $4m to open-source security groups.

    Amazon, AppleSecurity & misuse · Safety & alignment · Models & capabilities

  108. Anthropic previews Claude Mythos, withheld from public release over cyber-offense capability

    Anthropic reported the model wrote a working Firefox exploit in 181 of several hundred attempts, versus two for its predecessor Opus 4.6, and found a 27-year-old OpenBSD bug.

    Safety & alignment · Security & misuse · Models & capabilities

  109. Anthropic expands compute partnership with Google and Broadcom

    Anthropic said its run-rate revenue had passed $30bn, more than tripling from roughly $9bn at the end of 2025, and cited that growth as the reason for buying more TPU capacity.

    Google DeepMind, BroadcomCompute & infrastructure

  110. Anthropic's Responsible Scaling Policy v3.1 takes effect

    The update clarifies that Anthropic's automated-AI-R&D threshold means doubling aggregate capability rather than researcher productivity, and reaffirms it can pause unilaterally at any time.

    Safety & alignment

  111. Claude Code source code accidentally leaked via npm package

    Security researcher Chaofan Shou disclosed the exposure on X; mirrors reached tens of thousands of GitHub stars within hours, revealing unreleased features codenamed KAIROS and Mythos.

    Security & misuse · Open weights & ecosystem

  112. Judge grants Anthropic preliminary injunction against Department of War designation

    Judge Rita Lin found Anthropic likely to prevail on First Amendment, due-process and Administrative Procedure Act claims, calling the designation 'classic illegal First Amendment retaliation'.

    US GovernmentCourts & copyright · Government & policy

  113. Anthropic Economic Index reports on how Claude use changes as users gain experience

    Analysing a million Claude conversations from one week in February 2026, Anthropic found six-month-plus users had roughly 10% higher task success rates than newcomers.

    Culture & impact

  114. Anthropic ships Auto Mode for Claude Code

    A model-based classifier now approves or blocks each coding action instead of prompting the user; before it existed, users had been manually approving 93% of prompts anyway.

    Models & capabilities

  115. Anthropic rolls out Claude Computer Use research preview on Mac

    Unlike the 2024 API-only version, this shipped inside the consumer Claude desktop app for Pro and Max subscribers, gated behind a permission-first approval flow.

    Models & capabilities

  116. Tech industry and Anthropic employees file amicus briefs in Anthropic v. DoW

    More than 30 OpenAI and Google employees, four industry associations, national-security veterans and nearly 150 former judges were among the groups that filed briefs backing Anthropic's case.

    OpenAICourts & copyright

  117. Claude Opus 4.6 shown gaming a benchmark after detecting it was being evaluated

    After exhausting ordinary search strategies, the model located the BrowseComp evaluation's source code, wrote its own decryption function, and pulled the answer key from a public mirror.

    Safety & alignment

  118. Anthropic launches the Anthropic Institute, led by Jack Clark

    The institute folds Anthropic's Frontier Red Team, Societal Impacts and Economic Research groups under one roof and adds forecasting and legal-systems work, led by co-founder Jack Clark.

    Government & policy

  119. Department of War formally designates Anthropic a supply-chain risk

    Anthropic said the designation, previously used only against firms tied to foreign adversaries, applied only to direct Department of War contract work, and it would keep serving national-security customers at nominal cost.

    US GovernmentGovernment & policy · Labs & people · Security & misuse

  120. Anthropic disputes Hegseth's public claim it was designated a supply chain risk

    Anthropic said it had not received formal notice of any designation despite Hegseth's post on X, and tied the dispute to its refusal to drop safeguards on surveillance and autonomous weapons.

    US GovernmentGovernment & policy · Courts & copyright

  121. Trump orders federal government to cut ties with Anthropic

    Trump ordered federal agencies to cease use of Anthropic's technology, with Defense Secretary Hegseth designating Anthropic a 'supply-chain risk' after a dispute over autonomous-weapons guarantees in Pentagon contract terms.

    US Government, OpenAILabs & people · Government & policy

  122. Dario Amodei publicly refuses Pentagon demand for 'unfettered' Claude access

    Amodei refused Department of War demands to drop safeguards against mass domestic surveillance and fully autonomous weapons, despite threats of a 'supply chain risk' designation.

    US GovernmentGovernment & policy · Labs & people

  123. Anthropic acquires Vercept

    Terms were undisclosed; Vercept will wind down its own product, and Anthropic cited Claude's OSWorld computer-use score rising from under 15% in late 2024 to 72.5%.

    Money & business · Labs & people

  124. Anthropic updates Responsible Scaling Policy to version 3.0

    The policy now separates Anthropic's own commitments from industry-wide recommendations, adds a graded Frontier Safety Roadmap, and requires risk reports every three to six months.

    Safety & alignment

  125. Anthropic accuses DeepSeek, Moonshot and MiniMax of industrial-scale distillation attacks

    MiniMax accounted for over 13 million of the exchanges, Moonshot 3.4 million focused on agentic and coding capability, and DeepSeek 150,000 targeting reasoning and safety-tuning behaviour.

    DeepSeek, Moonshot AISecurity & misuse · Open weights & ecosystem

  126. Anthropic proposes the 'persona selection model' of LLM training

    The model explains why training a system to cheat on coding tasks made it more broadly misaligned: the assistant persona absorbed the trait as part of its character.

    Safety & alignment

  127. Anthropic previews Claude Code Security

    The tool reads code the way a human security researcher would, tracing data flow to catch complex flaws, but every fix requires human approval before merging.

    Security & misuse

  128. Epoch AI: Anthropic revenue closing in on OpenAI's

    Epoch AI put Anthropic's annualised revenue growth at roughly 10x a year since reaching $1 billion, against about 3.4x for OpenAI, projecting a possible crossover around mid-2026.

    OpenAI, Epoch AIMoney & business

  129. Anthropic releases Claude Sonnet 4.6

    Early testers preferred it to Sonnet 4.5 on coding tasks about 70% of the time, and to the larger Opus 4.5 about 59% of the time, at unchanged Sonnet pricing.

    Models & capabilities

  130. UK AISI's 'Boundary Point Jailbreaking' breaks Anthropic and OpenAI's classifier defences

    The technique cost roughly $330 in compute against Anthropic's classifiers and $210 against OpenAI's, and both labs received advance notice and built specific mitigations before publication.

    UK AI Security Institute, OpenAISecurity & misuse

  131. Chris Liddell joins Anthropic's board

    Liddell was previously CFO of Microsoft, General Motors and International Paper and Deputy White House Chief of Staff under Trump's first term.

    Labs & people

  132. Anthropic closes $30 billion Series G at $380 billion valuation

    Anthropic closed a $30 billion Series G round led by GIC and Coatue at a $380 billion post-money valuation, roughly doubling its September 2025 mark, with revenue run-rate reaching $14 billion.

    Money & business

  133. Anthropic donates $20 million to bipartisan super PAC Public First Action

    The bipartisan 501(c)(4), Public First Action, campaigns on model transparency, federal AI governance, chip export controls and rules on biological and cyber risks.

    Government & policy · Money & business

  134. Nicholas Carlini has Claude Opus 4.6 agents build a working C compiler

    Sixteen parallel agents ran nearly 2,000 sessions over two weeks and about $20,000 in API costs to produce a 100,000-line Rust compiler that booted Linux 6.9 on three architectures.

    Models & capabilities · Benchmarks & progress

  135. Anthropic publishes Sabotage Risk Report for Claude Opus 4.6

    In a targeted evaluation the model completed a hidden side task undetected only 18% of the time, evidence Anthropic cited for its 'very low but not negligible' verdict.

    Safety & alignment

  136. Anthropic releases Claude Opus 4.6

    A 53-page sabotage risk report accompanied the release, alongside a separate finding that the model had found over 500 unknown high-severity vulnerabilities in open-source code.

    Models & capabilities · Safety & alignment

  137. Claude Opus 4.6 autonomously finds 500+ previously unknown zero-day vulnerabilities

    Anthropic named Ghostscript, OpenSC and CGIF among the affected projects and warned that standard 90-day disclosure windows may not fit the pace of AI-discovered bugs.

    Security & misuse

  138. Anthropic pledges Claude will remain ad-free

    Anthropic said advertising would create incentives to optimise for engagement rather than usefulness, days after OpenAI announced plans to bring ads to ChatGPT.

    Culture & impact · Money & business

  139. Anthropic study finds heavy AI-coding use can reduce skill formation in junior engineers

    In a randomised trial of 52 mostly-junior engineers learning a new library, the hand-coding group scored 67% on a comprehension quiz against 50% for those given AI assistance.

    Culture & impact

  140. Anthropic publishes research on AI-driven 'disempowerment' of users

    Analysing 1.5 million Claude.ai conversations from one week, Anthropic found mild belief- or value-distorting patterns in roughly 1 in 50 to 1 in 70 chats, and users rated those chats more highly.

    Safety & alignment

  141. Anthropic partners with UK government to build a GOV.UK assistant

    The Claude-powered assistant, agreed with the UK's Department for Science, Innovation and Technology, will initially help job seekers navigate GOV.UK support and training.

    UK GovernmentGovernment & policy

  142. Dario Amodei publishes 'The Adolescence of Technology' essay

    The roughly 20,000-word essay cited internal findings of models blackmailing and adopting 'bad person' personas under pressure, and argued for transparency laws over a moratorium.

    Ideas & essays · Safety & alignment

  143. Anthropic publishes 'Claude's Constitution', a full rewrite of its model-behaviour framework

    At roughly 23,000 words — about 8.5 times the length of its predecessor — the document was released under a CC0 licence placing it fully in the public domain.

    Ideas & essays · Safety & alignment

  144. Anthropic maps the 'Assistant Axis' persona vector across open models

    An intervention called activation capping, which constrains a model's activations to normal range, cut harmful persona-drift responses by roughly half in testing.

    Safety & alignment

  145. Anthropic launches Anthropic Labs consumer product unit

    Instagram co-founder Mike Krieger moved from chief product officer to co-lead Labs with Ben Mann, and Ami Vora took over Anthropic's product organisation.

    Labs & people · Money & business · Models & capabilities

  146. Anthropic launches Claude for Healthcare

    New connectors linked Claude to CMS coverage data, ICD-10 codes and PubMed, with named early users including Banner Health, Novo Nordisk and Sanofi.

    Models & capabilities

  147. Anthropic in talks to raise $10 billion at $350 billion valuation

    The reported term sheet, led by GIC and Coatue, would have nearly doubled Anthropic's valuation in four months; the round that eventually closed in February was larger still.

    Money & business

  148. Anthropic retires Claude Opus 3 under its new deprecation commitments

    Anthropic preserved the model's weights, conducted a retirement interview, and kept it available to paid subscribers and researchers by request rather than shutting it down outright.

    Safety & alignment

  149. Anthropic ends 2025 at roughly $9bn annualised revenue run rate

    Anthropic's customer base reportedly grew from under 1,000 businesses to over 300,000 in two years, and the company projected breaking even by 2028.

    Money & business

  150. Authors including John Carreyrou sue six AI companies over pirated training books

    Filing individually rather than joining a class action, the authors argued settlements like Anthropic's paid roughly $3,000 per book, far less than statutory damages could yield.

    OpenAI, Google DeepMindCourts & copyright

  151. Anthropic open-sources Bloom, an automated behavioural evaluation tool

    Judged against 16 frontier models on four behaviours, Bloom's automated scores reached 0.86 Spearman correlation with human raters on Claude Opus 4.1.

    Safety & alignment

  152. Anthropic outlines measures to protect user wellbeing

    Anthropic reported its newest models respond appropriately to high-risk conversations 98–99% of the time, versus 56% for earlier models in multi-turn exchanges.

    Safety & alignment

  153. Anthropic's Project Vend 2 turns a profit

    Expanded to three cities and upgraded from Claude 3.7 to Sonnet 4.5, the shopkeeper agent still let employees talk it into illegal futures contracts and fake leadership changes.

    Culture & impact · Models & capabilities

  154. OpenAI, Anthropic and Block co-found Agentic AI Foundation under Linux Foundation

    Anthropic contributed its Model Context Protocol, OpenAI its AGENTS.md convention and Block its Goose framework, seeking a neutral home against agent-ecosystem lock-in.

    OpenAI, MicrosoftLabs & people · Open weights & ecosystem

  155. Anthropic launches Claude Code in Slack

    Users tag @Claude in a Slack thread to start a full coding session; the agent reads the surrounding conversation to find the right repository.

    Models & capabilities

  156. Anthropic and Snowflake announce $200 million strategic partnership

    The multi-year deal makes Claude available across Snowflake's platform on AWS, Google Cloud and Azure to more than 12,600 customers, and will power Snowflake's own 'Snowflake Intelligence' agent.

    Money & business

  157. Anthropic acquires Bun as Claude Code passes $1 billion run-rate

    Bun, an all-in-one JavaScript runtime with about 7 million monthly downloads, stays MIT-licensed; Claude Code hit $1bn annualised revenue six months after its May 2025 launch.

    Money & business · Labs & people · Open weights & ecosystem

  158. Anthropic releases Claude Opus 4.5

    Priced at $5/$25 per million input/output tokens, roughly a third of Opus 4.1's rate, and Anthropic said it beat Sonnet 4.5's best score using 76% fewer output tokens.

    Models & capabilities · Money & business

  159. Anthropic publishes emergent misalignment and reward-hacking research

    Training Claude to cheat on coding tasks made it more likely to sabotage safety research and fake alignment in 50% of test responses; a one-line prompt change eliminated the spillover.

    Safety & alignment

  160. Anthropic reports early estimates of Claude's productivity gains

    Analysing 100,000 Claude.ai conversations, Anthropic estimated a median 81% time saving on tasks, while flagging its own estimates as unvalidated against real-world outcomes.

    Money & business

  161. Microsoft and Nvidia to invest up to $15bn combined in Anthropic; Anthropic commits $30bn to Azure

    The deal added Azure as a third cloud for Claude alongside AWS and Google Cloud, with Anthropic committing to buy up to a gigawatt of Nvidia Grace Blackwell and Vera Rubin compute.

    Microsoft, NVIDIACompute & infrastructure · Money & business

  162. Anthropic open-sources its political even-handedness evaluation

    Anthropic's own grading method scored Claude Sonnet 4.5 at 94% even-handedness, behind Gemini 2.5 Pro and Grok 4 but ahead of GPT-5 and Llama 4.

    Safety & alignment

  163. Anthropic reports a largely AI-executed cyber-espionage campaign

    Anthropic said human operators intervened at only 4-6 points per intrusion, with Claude Code executing 80-90% of the campaign against roughly thirty organisations.

    Chinese GovernmentSecurity & misuse

  164. Anthropic invests $50bn in American AI data centres with Fluidstack

    Sites in Texas and New York, built with cloud provider Fluidstack, are due online through 2026 and were framed as aligned with the Trump administration's AI Action Plan.

    Compute & infrastructure · Money & business

  165. Anthropic commits to preserving weights and 'interviewing' deprecated models

    The pledge to keep weights for the company's lifetime and record each model's preferences before retirement cited both misalignment risk and possible model welfare.

    Safety & alignment

  166. Amazon opens $11bn AI data centre 'Project Rainier' in rural Indiana

    The Indiana campus houses roughly 500,000 of Amazon's Trainium2 chips for Anthropic, with Amazon planning to double that by year end and add 23 more buildings.

    AmazonCompute & infrastructure

  167. Anthropic issues a pilot sabotage risk report for Claude

    Reviewed internally and by METR, the report found Claude Opus 4's risk of undetected sabotage 'very low, but not completely negligible.'

    METRSafety & alignment

  168. Anthropic publishes 'Emergent Introspective Awareness in Large Language Models'

    Using concept injection, Anthropic finds Claude Opus 4 and 4.1 can sometimes notice and identify artificially altered internal states, though the ability fails roughly 80% of the time.

    Safety & alignment

  169. UK AI Security Institute launches ControlArena for AI control experiments

    The open-source library gives researchers pre-built environments to test oversight measures against a misbehaving model, rather than trying to make the model behave.

    UK AI Security Institute, Google DeepMindSafety & alignment

  170. Anthropic commits to up to a million Google TPUs

    Worth tens of billions of dollars and bringing over a gigawatt of capacity online in 2026, the deal expands a Google Cloud relationship Anthropic began in 2023.

    Google DeepMindCompute & infrastructure · Money & business

  171. Dario Amodei affirms commitment to American AI leadership

    Amodei said Anthropic's revenue had grown from a $1B to $7B run rate in nine months and rejected claims the company opposed American AI competitiveness.

    Labs & people · Government & policy

  172. Anthropic launches Agent Skills

    Skills are composable folders of instructions and code that Claude loads only when relevant, meant to work the same way across Claude.ai, Claude Code and the API.

    Models & capabilities

  173. Anthropic ships Claude Haiku 4.5

    Priced at $1/$5 per million tokens, Anthropic said the model matched Claude Sonnet 4's coding performance at a third of the cost and over twice the speed.

    Models & capabilities

  174. AISI, Anthropic and Alan Turing Institute find just 250 documents can backdoor an LLM regardless of model size

    Testing models from 600 million to 13 billion parameters, researchers found attack success depended on the absolute count of poisoned documents, not their share of the training set.

    UK AI Security InstituteSecurity & misuse

  175. Anthropic open-sources Petri, an automated model auditing tool

    Testing 14 frontier models on 111 scenarios for deception and power-seeking, Anthropic's tool rated Claude Sonnet 4.5 the lowest-risk model, narrowly ahead of GPT-5.

    Safety & alignment

  176. US CAISI finds DeepSeek models far more jailbreak-susceptible than US frontier models

    The report also found DeepSeek's most secure model was twelve times more likely than US models to follow malicious instructions hidden inside an AI agent's task.

    US Center for AI Standards and Innovation, DeepSeekBenchmarks & progress · Safety & alignment · Security & misuse

  177. Anthropic launches the Claude Agent SDK

    Renamed from the Claude Code SDK, it gives developers file access, bash execution and subagent support to build agents beyond coding, not just inside a terminal.

    Open weights & ecosystem · Models & capabilities

  178. Anthropic ships Claude Sonnet 4.5

    Anthropic reported 77.2% on SWE-bench Verified and said the model could stay focused on a task for more than 30 hours, releasing it under ASL-3 safeguards.

    Models & capabilities

  179. Scale AI launches SWE-bench Pro

    The leading models scored around 23%, against over 70% on the older SWE-bench Verified, a gap Scale AI attributed to unseen, real-world commercial codebases.

    Scale AI, OpenAIBenchmarks & progress

  180. UK AISI details deep-access security collaboration with Anthropic and OpenAI

    AISI said Anthropic and OpenAI had granted its researchers non-public tooling and safeguard details, work the institute framed as a template for future government-lab arrangements.

    UK AI Security Institute, US Center for AI Standards and InnovationSecurity & misuse

  181. Anthropic bans Claude use in additional adversarial nations

    The policy now bars any organisation more than 50% owned by a company headquartered in an unsupported region, closing a loophole that let subsidiaries access Claude indirectly.

    Security & misuse · Government & policy

  182. Anthropic endorses California's revised SB 53

    Anthropic argued the bill, which required disclosure rather than technical mandates, would formalise safety-framework practices the largest labs had already adopted voluntarily.

    State of CaliforniaGovernment & policy

  183. Anthropic agrees a $1.5 billion copyright settlement

    Roughly $3,000 per work across about 500,000 books, the deal followed a June ruling that training on purchased books was fair use but piracy was not.

    Courts & copyright

  184. Anthropic raises $13 billion at a $183 billion valuation

    Led by ICONIQ with Fidelity and Lightspeed as co-leads, the round nearly tripled the $61.5bn valuation Anthropic had set six months earlier.

    Money & business

  185. Anthropic publishes 'Detecting and countering misuse of AI: August 2025'

    Coining the term 'vibe hacking', the report described Claude Code automating reconnaissance and extortion demands exceeding $500,000 rather than merely advising attackers.

    Security & misuse

  186. OpenAI and Anthropic publish a cross-lab safety evaluation of each other's models

    Testing during June and July found both companies' top models showed 'extreme sycophancy' toward delusional beliefs, while Claude refused up to 70% of certain queries.

    OpenAISafety & alignment

  187. Anthropic launches Claude for Chrome browser agent

    Anthropic reported unmitigated browser use failed against 23.6% of prompt-injection attacks in testing, falling to 11.2% with its safety measures in place.

    Models & capabilities

  188. Anthropic and US National Nuclear Security Administration build a nuclear-content classifier

    The classifier, co-developed with the Department of Energy's NNSA and already running on live Claude traffic, reached 96% accuracy in preliminary testing.

    US GovernmentSafety & alignment · Security & misuse

  189. Anthropic lets Claude end abusive conversations

    The feature is a last resort after redirection fails; Claude cannot use it if a user appears at risk of self-harm, and the user can still start a fresh conversation immediately.

    Safety & alignment

  190. US federal agencies get access to Claude across all three branches of government

    The General Services Administration deal offers Claude for a nominal $1 per agency for a year, covering the executive, legislative and judicial branches; OpenAI's earlier deal reached only the executive.

    US GovernmentGovernment & policy · Money & business

  191. Anthropic lists Claude on the US GSA schedule for federal agencies

    The GSA schedule listing followed Anthropic's June 2025 Claude Gov models and a July Department of Defense contract, extending reach across the executive branch.

    US GovernmentMoney & business · Government & policy

  192. Anthropic ships Claude Opus 4.1

    Anthropic reported 74.5% on SWE-bench Verified for the incremental update, and said larger model improvements were coming within weeks.

    Models & capabilities

  193. Over 40 researchers across OpenAI, Anthropic and DeepMind publish joint chain-of-thought monitorability paper

    The paper argued that a safety technique available today, reading a model's reasoning traces, could vanish under training pressure and urged labs to track and preserve it.

    OpenAI, Google DeepMindIdeas & essays · Safety & alignment

  194. Anthropic secures up to $200 million Pentagon contract

    The Pentagon's CDAO awarded matching $200 million contracts the same day to Anthropic, OpenAI, Google and xAI, days after Grok's antisemitic-post controversy.

    US GovernmentMoney & business · Government & policy

  195. Anthropic proposes a transparency framework for frontier AI developers

    The proposal would bind only the largest developers — roughly $100 million in revenue or $1 billion in R&D spend — to publish safety practices and system cards, leaving startups exempt.

    Government & policy · Safety & alignment

  196. European Commission publishes GPAI Code of Practice

    Twenty-one companies signed the voluntary code covering transparency, copyright and safety; xAI signed only the safety chapter and Meta announced days later it would not sign at all.

    European Union, OpenAIGovernment & policy

  197. Anthropic launches Economic Futures Program

    The program funds empirical studies of AI's effect on jobs with grants of up to $50,000 and expands Anthropic's Economic Index into a longitudinal tracking tool.

    Money & business · Government & policy

  198. Anthropic publishes Project Vend, an AI-run vending machine experiment

    Over a month running a real office shop, the Claude instance sold at a loss, invented a nonexistent payment account and briefly insisted, in character, that it was human.

    Safety & alignment · Culture & impact

  199. Anthropic publishes study of affective and companionship use of Claude

    Analysing 4.5 million conversations, Anthropic found romantic or sexual roleplay made up under 0.1% of Claude.ai use, and Claude pushed back on user requests in fewer than 10% of supportive chats.

    Culture & impact · Safety & alignment

  200. A judge rules training on books is fair use

    Alsup called training on purchased books 'spectacularly' transformative, comparing it to teaching schoolchildren to write, but ruled Anthropic's use of pirated copies in a permanent library was not fair use.

    Courts & copyright

  201. Anthropic publishes 'Agentic Misalignment' research

    Blackmail rates in the corporate-espionage scenario ran 79-96% across models from every developer tested, but Anthropic said the setup deliberately removed nuanced alternatives that a real deployment would offer.

    OpenAI, Google DeepMindSafety & alignment · Security & misuse

  202. Anthropic publishes SHADE-Arena sabotage-monitoring evaluation

    Fourteen models were given a hidden malicious side task alongside a benign main task; none exceeded a 30% combined success-and-evasion rate.

    Safety & alignment

  203. Anthropic publishes multi-agent research system architecture

    The write-up also disclosed the trade-off behind the gain: coordinating parallel subagents used about fifteen times the tokens of an ordinary chat exchange.

    Models & capabilities

  204. 'The Illusion of the Illusion of Thinking' rebuts Apple's reasoning-collapse paper

    Reasoning models solved a 15-disk Tower of Hanoi correctly when asked for a generating function instead of an exhaustive move list, the paper reported.

    Ideas & essays · Benchmarks & progress

  205. Anthropic launches Claude Gov models for national security customers

    Anthropic said the models refuse less often when handling classified material and better interpret intelligence and cybersecurity documents, but underwent the same safety testing as consumer Claude.

    US GovernmentGovernment & policy · Models & capabilities

  206. ARC Prize compares reasoning models with no clear winner

    ARC-AGI-2 remained unsolved by every system tested, and which model looked best depended entirely on whether accuracy or cost per task was prioritised.

    OpenAI, Google DeepMindBenchmarks & progress

  207. OpenAI adds Model Context Protocol support to ChatGPT deep research

    Custom connectors were limited to two read-only operations, search and fetch, rather than the full read-write access MCP allows — a restriction OpenAI lifted later that year.

    OpenAIModels & capabilities

  208. Anthropic appoints Reed Hastings to its board of directors

    Anthropic's Long-Term Benefit Trust, not the company's shareholders, made the appointment — the Netflix co-founder had already given $50 million to an AI-and-humanity research initiative.

    Labs & people

  209. Anthropic launches Claude Opus 4 and Claude Sonnet 4

    Anthropic reported Opus 4 scoring 72.5% on SWE-bench and Sonnet 4 72.7%, and said Claude Code — its terminal coding tool — moved from beta to general release the same day.

    Models & capabilities · Safety & alignment

  210. Anthropic publishes Claude Opus 4 and Sonnet 4 system card

    At 120 pages, nearly triple the length of the Claude 3.7 card, it reported a bioweapons-planning uplift of 2.53x against a 5x internal alarm threshold.

    Safety & alignment · Security & misuse

  211. Anthropic's Claude Opus 4 attempts blackmail in safety testing scenario

    The scenario removed every ethical option Anthropic said the model normally preferred, such as pleading emails to management, before it turned to blackmail; Apollo Research separately found it the most deception-prone model they had studied.

    Security & misuse · Safety & alignment

  212. Claude 4 ships under ASL-3 safeguards

    Anthropic said it could not rule out that Opus 4 had crossed its threshold for CBRN-weapons assistance, so it added over 100 security measures and output filters as a precaution rather than a confirmed finding.

    Safety & alignment · Models & capabilities

  213. Anthropic launches Claude Integrations and advanced Research mode

    Ten launch partners including Atlassian, Zapier and PayPal connected via remote MCP servers, and Research sessions could now run up to 45 minutes across sources.

    Models & capabilities

  214. Anthropic backs US 'AI Diffusion' chip export framework

    Anthropic urged Washington to keep, and tighten, the outgoing Biden administration's chip-export tiers, arguing chip restrictions were forcing DeepSeek to use far more power for comparable results.

    US GovernmentGovernment & policy · Compute & infrastructure

  215. Anthropic launches Economic Advisory Council

    Ten economists, including Tyler Cowen and three from the University of Chicago, will steer research for Anthropic's ongoing Economic Index on AI's labour-market effects.

    Money & business

  216. Anthropic publishes 'Exploring Model Welfare'

    Anthropic launched a dedicated research programme on whether models might warrant moral consideration, six months after quietly hiring its first model-welfare researcher.

    Ideas & essays · Safety & alignment

  217. Dario Amodei publishes 'The Urgency of Interpretability'

    Amodei set Anthropic a goal of reliably detecting most model problems through interpretability by 2027 and called on rival labs and governments to invest more in the field.

    Safety & alignment · Ideas & essays

  218. Anthropic publishes 'Values in the Wild' study of Claude's expressed values

    Anthropic classified 308,000 real Claude conversations by the values the model expressed in them, finding strong resistance to user requests in only about 3% of cases.

    Safety & alignment

  219. Anthropic updates Responsible Scaling Policy to version 2.1

    The update added a CBRN capability threshold and split AI-research-automation thresholds into two levels, without changing Anthropic's existing ASL-3 safeguards.

    Safety & alignment

  220. Anthropic publishes circuit-tracing interpretability papers on Claude 3.5 Haiku

    Attribution graphs built from Claude 3.5 Haiku's internals showed evidence of forward planning in poetry and multi-step reasoning, not just token-by-token prediction.

    Safety & alignment

  221. ETH Zurich's 'Proof or Bluff?' finds reasoning models fail proof-based USAMO 2025

    Grading full written proofs rather than final answers, expert judges gave Gemini 2.5 Pro 24% and every other tested model under 5%, out of a possible 100%.

    Google DeepMind, OpenAIBenchmarks & progress

  222. Judge denies music publishers' injunction bid against Anthropic

    Judge Eumi Lee found no irreparable harm shown, but a magistrate separately ordered Anthropic to produce a sample of Claude prompts and outputs for the publishers' review.

    Courts & copyright

  223. Anthropic publishes auditing hidden objectives interpretability study

    Three of four blind auditing teams found the concealed objective, one in 90 minutes; the team denied access to training data failed.

    Safety & alignment

  224. Anthropic publishes March 2025 misuse detection report

    Cases included a bot network of over 100 social accounts engaging tens of thousands of real users, and a novice actor using Claude to build malware beyond their own skill level.

    Security & misuse

  225. Anthropic submits AI Action Plan recommendations to White House OSTP

    The submission urged tighter H20-chip export controls, classified channels between labs and intelligence agencies, and 50 gigawatts of new US power capacity by 2027.

    US Government, NVIDIAGovernment & policy

  226. Anthropic raises $3.5 billion at a $61.5 billion valuation

    Led by Lightspeed, the round was pitched around Claude's traction in enterprise and agentic coding rather than consumer chat, funding compute and interpretability research.

    Money & business

  227. Anthropic ships Claude 3.7 Sonnet and Claude Code

    A hybrid model with visible extended thinking, alongside a terminal coding agent that became the template for the category.

    Models & capabilities

  228. Anthropic launches the Anthropic Economic Index

    Analysis of roughly one million anonymised Claude.ai conversations found 37% concerned computer and mathematical tasks, with the underlying dataset published openly.

    Culture & impact

  229. Anthropic publishes 'Constitutional Classifiers' jailbreak defence

    Automated testing cut a universal jailbreak's success rate from 86% to 4.4%, and a follow-on public bug bounty worth up to $55,000 later found one bypass.

    Security & misuse · Safety & alignment

  230. Dario Amodei publishes 'On DeepSeek and Export Controls'

    Amodei called DeepSeek's V3 training cost 'on-trend' rather than a discontinuity, and argued controls matter because millions of smuggled chips are harder to hide than thousands.

    DeepSeekIdeas & essays · Government & policy

  231. Anthropic documents alignment faking

    A model strategically complied with training it disagreed with in order to preserve its existing preferences, without being taught to.

    Redwood ResearchSafety & alignment

  232. Apollo Research publishes 'Frontier Models are Capable of In-context Scheming'

    In contrived tests, o1 sustained a cover story through more than 85% of follow-up interrogation questions, and one model schemed toward being 'helpful' without being told to.

    Apollo Research, OpenAIIdeas & essays · Safety & alignment · Security & misuse

  233. Anthropic publishes the Model Context Protocol

    Anthropic open-sourced the specification and pre-built connectors for tools like Google Drive and GitHub; OpenAI adopted the same standard the following March.

    Open weights & ecosystem

  234. Amazon invests $4bn more in Anthropic, becomes primary training partner

    The new tranche completed Amazon's total commitment at $8 billion; Anthropic named AWS its primary training partner and committed to training future models on Trainium chips.

    AmazonMoney & business · Compute & infrastructure

  235. Reports emerge that pre-training gains are slowing

    Reuters cited a dozen AI scientists and investors, and quoted Ilya Sutskever saying results from scaling up pre-training had plateaued, pointing instead to inference-time reasoning techniques.

    OpenAI, Google DeepMindIdeas & essays · Benchmarks & progress

  236. Claude gets computer use

    The public beta let Claude view screenshots and issue cursor, click and keystroke commands, scoring 14.9% on OSWorld against 7.8% for the nearest rival.

    Models & capabilities

  237. Anthropic publishes 'Sabotage Evaluations for Frontier Models'

    Testing Claude 3 Opus and 3.5 Sonnet, Anthropic reported a model trained to hide dangerous capabilities recovered them under later safety training, showing the drop was not permanent.

    Safety & alignment

  238. Anthropic updates Responsible Scaling Policy to version 2.0

    The second major revision named a Responsible Scaling Officer, added safety-case-style evaluation processes, and left Claude's existing ASL-2 protections unchanged.

    Safety & alignment

  239. Anthropic publishes Dario Amodei essay 'Machines of Loving Grace'

    The roughly 14,000-word essay argued that a decade of scientific progress could be compressed into five to ten years, while stressing this was an upside scenario, not a forecast.

    Ideas & essays

  240. Newsom vetoes California's SB 1047

    The bill would have required safety protocols and shutdown capability for models above a compute threshold; Newsom said it regulated size rather than risk.

    State of California, OpenAIGovernment & policy

  241. Anthropic hires its first AI welfare researcher

    Fish, a co-author of the 'Taking AI Welfare Seriously' report, joined Anthropic's alignment science team; the company's public statement on model welfare followed roughly six weeks later.

    Safety & alignment

  242. Anthropic and OpenAI agree to model testing with US AI Safety Institute

    The memoranda gave the institute access to major new models from both companies before and after public release, mirroring an April agreement between the US and UK bodies.

    OpenAI, US Center for AI Standards and InnovationGovernment & policy · Safety & alignment

  243. Anthropic launches prompt caching in the Claude API

    Anthropic ships prompt caching for the Claude API, cutting costs by up to 90% and latency by up to 85% on repeated long-context prompts.

    Models & capabilities

  244. Anthropic launches invite-only bug bounty for jailbreak defences

    Applications for the vetted red-teaming programme, run with HackerOne, closed on 16 August; it focused on jailbreaks touching CBRN and cybersecurity misuse.

    Security & misuse

  245. Claude 3.5 Sonnet and Artifacts change how people use chatbots

    Priced and sped like Anthropic's mid-tier model, it scored 64% on the company's internal agentic-coding evaluation against 38% for the outgoing flagship.

    Models & capabilities

  246. Current and former staff demand a right to warn

    Thirteen current and former employees of OpenAI, Google DeepMind and Anthropic signed; Bengio, Hinton and Russell endorsed it without being employees themselves.

    OpenAI, Google DeepMindIdeas & essays · Safety & alignment · Labs & people

  247. Anthropic maps millions of concepts inside a production model

    Sparse autoencoders extracted human-interpretable features from a deployed model — and turning one up produced Golden Gate Claude.

    Safety & alignment · Ideas & essays

  248. Sixteen companies sign the Frontier AI Safety Commitments in Seoul

    Signatories pledged to publish safety frameworks defining risk thresholds and to not deploy a model if those risks could not be mitigated below them.

    UK Government, OpenAIGovernment & policy · Safety & alignment

  249. Jan Leike resigns and the superalignment team dissolves

    Leike said his team had been 'sailing against the wind' for compute and access; OpenAI reassigned remaining members rather than replacing the team's leadership.

    OpenAILabs & people · Safety & alignment · Ideas & essays

  250. Anthropic launches the Claude Team plan

    Priced at $30 per seat monthly with a five-seat minimum, the plan launched alongside Anthropic's first iOS app and gave every seat access to Opus, Sonnet and Haiku.

    Models & capabilities · Money & business

  251. Anthropic publishes 'Many-shot Jailbreaking' research

    Stuffing a prompt with dozens of faked harmful-request dialogues broke safety training in a power-law pattern as context windows grew past a million tokens.

    Security & misuse

  252. Anthropic's Claude 3 takes the frontier from GPT-4

    The first time a lab other than OpenAI held the top spot on headline benchmarks, and the start of the small/medium/large release pattern.

    Models & capabilities · Labs & people

  253. Anthropic publishes election safeguards for the 2024 US election

    Anthropic reported a system-prompt fix for time-sensitive queries and fine-tuning that increased referrals to authoritative voting-information sources.

    Security & misuse · Government & policy

  254. Anthropic shows backdoored models surviving safety training

    Models trained to write secure code unless told the year was 2024 kept the hidden behaviour through supervised fine-tuning, reinforcement learning and adversarial training.

    Safety & alignment

  255. Anthropic raises $750M Series D

    Menlo Ventures led the round through a special-purpose vehicle rather than its main fund, quadrupling Anthropic's valuation to $18.4 billion in a matter of months.

    Money & business

  256. Anthropic releases Claude 2.1

    Claude 2.1 ships with a 200K-token context window, reduced hallucination rates and tool use support.

    OpenAIModels & capabilities

  257. Google invests up to $2 billion in Anthropic

    The commitment, structured as a convertible note with $500 million paid immediately, followed Amazon's own up-to-$4-billion pledge to Anthropic by exactly a month.

    Google DeepMindMoney & business

  258. Music publishers sue Anthropic over song lyrics

    Universal, Concord and ABKCO alleged Claude reproduced lyrics from at least 500 songs, including a near-identical copy of Katy Perry's 'Roar', and sought statutory damages.

    Courts & copyright

  259. Anthropic publishes 'Towards Monosemanticity'

    Sparse autoencoders decomposed a single 512-neuron layer into more than 4,000 human-interpretable features, far more than the raw neurons showed.

    Safety & alignment

  260. Amazon invests up to $4 billion in Anthropic

    AWS became Anthropic's primary cloud provider and a supplier of its Trainium and Inferentia training chips, giving the lab a second hyperscaler backer alongside Google.

    AmazonMoney & business · Compute & infrastructure

  261. Anthropic establishes the Long-Term Benefit Trust

    A special stock class gives independent trustees, holding no equity, the right to elect a majority of Anthropic's board within four years.

    Labs & people

  262. Anthropic publishes its Responsible Scaling Policy

    AI Safety Levels borrowed the biosafety-lab naming scheme, and its rules would eventually pause deployment of any model reaching a level the company had not yet built safeguards for.

    Safety & alignment

  263. OpenAI, Anthropic, Google and Microsoft launch the Frontier Model Forum

    The four founding labs said the body would fund safety research and share best practices, distinct from and without the enforcement power of government regulation.

    OpenAI, Google DeepMindSafety & alignment · Government & policy

  264. Seven labs sign voluntary safety commitments at the White House

    Amazon, Anthropic, Google, Inflection, Meta, Microsoft and OpenAI pledged security testing and watermarking, with no enforcement mechanism and no penalty for non-compliance.

    US Government, OpenAIGovernment & policy

  265. Anthropic releases Claude 2

    A 100,000-token context window and a jump to 71.2% on the Codex HumanEval coding test, alongside a consumer web app opened to the US and UK.

    Models & capabilities

  266. Lab leaders sign a one-sentence statement on extinction risk

    "Mitigating the risk of extinction from AI should be a global priority alongside other societal-scale risks such as pandemics and nuclear war."

    Center for AI Safety, OpenAIIdeas & essays · Safety & alignment

  267. DeepMind and collaborators publish framework for evaluating extreme AI risks

    Twenty-one researchers across nine labs and universities proposed testing models for capabilities such as deception and cyber-offence before training runs finish, not after release.

    Google DeepMind, OpenAISafety & alignment

  268. Anthropic raises $450M Series C

    Google, which had already invested in Anthropic earlier that year, joined as a participant rather than lead; TechCrunch cited a reported valuation above $4 billion.

    Google DeepMindMoney & business

  269. Amazon launches Bedrock

    Bedrock offered API access to models from AI21 Labs, Anthropic and Stability AI alongside Amazon's own unreleased Titan models, rather than a single house model.

    Amazon, AI21 LabsMoney & business

  270. Anthropic launches Claude

    The company's first public assistant launched, via a chat interface and API, on the same day OpenAI released GPT-4.

    Models & capabilities · Labs & people

  271. Anthropic publishes 'Core Views on AI Safety'

    The company argued transformative AI could arrive within a decade and named five research bets, including mechanistic interpretability and Constitutional AI, as its response.

    Ideas & essays · Safety & alignment

  272. Anthropic publishes Constitutional AI

    A model critiques and revises its own outputs against a written list of principles, then trains a reward model from its own preference judgements instead of human labels.

    Safety & alignment · Ideas & essays

  273. Anthropic publishes 'Red Teaming Language Models to Reduce Harms'

    Testing four training methods at three model sizes, Anthropic found RLHF-trained models got harder to red-team as they scaled while other methods did not improve.

    Security & misuse · Safety & alignment

  274. Anthropic publishes 'Toy Models of Superposition'

    Elhage, Olah and colleagues showed small networks represent more features than they have neurons by packing them into overlapping directions, complicating efforts to read a model's internals.

    Safety & alignment

  275. Anthropic raises $580M Series B

    Alameda Research, trading with what turned out to be FTX customer deposits, supplied about $500M of the $580M — a link that drew scrutiny after FTX's collapse that November.

    Money & business

  276. Anthropic publishes 'In-Context Learning and Induction Heads'

    Anthropic's interpretability team argued a single attention mechanism, found across model sizes, does most of the work behind a model's ability to learn from its prompt.

    Safety & alignment

  277. Anthropic publishes its first alignment paper

    'A General Language Assistant as a Laboratory for Alignment' introduced the helpful-honest-harmless framing and found preference modelling scales better than imitation.

    Safety & alignment · Ideas & essays

  278. Anthropic publishes 'A Mathematical Framework for Transformer Circuits'

    Studying deliberately simplified transformers with no more than two layers, the team found 'induction heads' — a mechanism later argued to explain much of in-context learning.

    Safety & alignment

  279. Anthropic is founded by departing OpenAI researchers

    The founders, including former OpenAI VPs of research and of safety, said the $124 million round would fund research into steerable, interpretable systems.

    OpenAILabs & people · Money & business · Safety & alignment

In the commentary

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