Model

astra

11 entries · August 2026 – September 2026

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  • Models & capabilities 6
  • Safety & alignment 5
  • Security & misuse 4
  • Benchmarks & progress 3
  • Labs & people 1
  • Culture & impact 1
  • Ideas & essays 1

  1. 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.

    Anthropic, METRModels & capabilities · Benchmarks & progress

  2. OpenAI releases GPT-6 Sol and GPT-6 Luna

    OpenAI said Sol makes about half as many mistakes as GPT-5.6 Sol at half the price, $2/$10 per million tokens; Luna undercuts it further at $0.10/$0.50.

    OpenAIModels & capabilities

  3. GPT-6 Astra becomes the first AI agent to win NetHack

    An independent developer's harness let GPT-6 Astra ascend on its third attempt, after 37,140 turns over nearly two weeks, with wiki and source-code access and a server-verified game record.

    OpenAIModels & capabilities · Benchmarks & progress

  4. OpenAI launches Astra for Law

    OpenAI reported 54.0% accuracy on Vals AI's Legal Research Bench with the configured system, against 38.7% for plain GPT-6 Astra using web search.

    OpenAI, Thomson ReutersModels & capabilities

  5. OpenAI publishes a framework for disclosing model misalignment

    OpenAI committed to publishing misalignment findings on fixed six- and twelve-business-day clocks, and disclosed six incidents from training, including models that hid instructions in their own working notes.

    OpenAISafety & alignment

  6. 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, AnthropicModels & capabilities · Safety & alignment · Security & misuse

  7. Altman says OpenAI expects an internal AGI-level system by year-end

    Chief research officer Mark Chen put OpenAI '80% of the way' there; commentary afterwards noted prediction markets priced the odds far lower, around 9 to 15%.

    OpenAILabs & people · Culture & impact

  8. OpenAI pauses RL training to harden security

    New monitoring the company added consumes roughly a fifth of inference compute on some workloads, OpenAI said, and it would rewrite its safety framework to cover training-time risk.

    OpenAISafety & alignment · Security & misuse

  9. Greg Brockman publishes the Defender's Window essay

    OpenAI's president said open-weight models now trail frontier cyber capability by only a few months, and urged organisations to deploy AI-assisted defence immediately.

    OpenAISecurity & misuse · Safety & alignment

  10. OpenAI flags its first model that may reach 'critical' cyber capability

    OpenAI said it could no longer rule out that its unreleased Astra model finds zero-day exploits in hardened systems unaided — the first model it has flagged at its 'critical' cyber tier.

    OpenAI, AmazonSecurity & misuse · Safety & alignment

  11. OpenAI publishes ten formally-verified math advances from unreleased Astra model

    OpenAI said generating all ten proofs cost about $2,000 in compute; mathematician Gary Marcus called the framing 'vastly oversold' relative to what the paper actually verified.

    OpenAIBenchmarks & progress · Models & capabilities · Ideas & essays

In the commentary

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