Google DeepMind safety researcher Alex Turner details quitting over a Pentagon AI deal

Alex Turner, an AI safety researcher who had left Google DeepMind the previous month, published an account of his resignation, saying he departed because Google had signed a military contract he believed broke a public commitment the company made in 2018. That year, Google researchers including Jeff Dean signed a pledge not to “participate in nor support” the development or use of lethal autonomous weapons, after employee protest over a Pentagon drone-imagery contract. Turner said Google signed a new agreement on 28 April 2026 allowing the Pentagon to use its Gemini models for “any lawful government purpose,” with only non-binding language discouraging use in autonomous weapons or mass surveillance — protections he described as weaker than those a competitor had insisted on.

Turner’s essay set out a months-long internal campaign that preceded his resignation. He said he raised concerns about Google’s involvement in immigration enforcement with Sundar Pichai, Demis Hassabis and Thomas Kurian in February 2026 and received no response; lobbied AI-safety figures Stuart Russell and Yoshua Bengio at a Paris conference, with mixed results; organised an employee petition to Jeff Dean; and drafted a 25-page framework proposing binding contract restrictions, which he pitched to Dean directly and later escalated to Hassabis without securing a commitment. He credited Dean with signing an amicus brief backing Anthropic’s separate legal resistance to Pentagon pressure, which he said slowed the negotiations, but said Dean did not otherwise use his influence to stop the deal. He wrote that Anthropic had refused Pentagon demands to drop its own red lines against autonomous weapons and mass surveillance, which he took as evidence that resistance was commercially possible.

The account is one researcher’s version of internal events, based on his own record of emails, meetings and drafts rather than an independently documented negotiation; Google did not comment publicly on the specifics Turner described. Turner said he left unemployed rather than move to a competitor, framing the episode as evidence that voluntary industry commitments on military AI use had not held under commercial and government pressure.