Alex Turner · 2026-07-15 · notable
Alex Turner — Why I left Google DeepMind
Alex Turner, an alignment researcher at DeepMind, publishes his resignation letter. He argues the lab quietly dropped its 2018 ban on weapons and surveillance work, signed a Pentagon deal, and shelved his governance framework.
A DeepMind alignment researcher publishes his resignation letter and explains why he stopped believing in the company's safety promises.
What is it?
Turner's essay walks through his time on Google DeepMind's alignment team and the moment he decided the company's safety review process was hollow. He points to DeepMind's 2018 AI Principles, which explicitly banned weapons and surveillance uses, and to leadership removing those clauses in February 2025 while claiming 'nothing's changed about our principles.'
How does it work?
The essay reconstructs the internal timeline: over 600 employees signed letters against a classified Pentagon AI deal that allowed 'any lawful government purpose' with only non-binding language on autonomous weapons; Turner drafted a 25-page governance framework with outside legal experts; senior policy staff, he says, simply never evaluated it.
Why does it matter?
This is a rare first-person account of how a frontier lab weakens its own safety guardrails under commercial and political pressure. Turner's exit follows John Jumper leaving DeepMind for Anthropic and lends weight to fears that top alignment talent is voting with its feet.
Who is it for?
AI safety researchers, policy watchers, DeepMind employees