Anthropic researcher Jacob Coxon resigns over race toward self-improving AI

The pretraining researcher worked at OpenAI and Anthropic, then concluded that private labs cannot safely coordinate a slowdown.

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Why it matters

Coxon's exit challenges Anthropic's central bargain: that a safety-focused lab can keep advancing frontier capabilities without reproducing the race dynamics it warns about.

A concerned male researcher stands in a modern computational lab, looking towards the viewer with a thoughtful expression.

Jacob Coxon (@hilbertspaess), a pretraining researcher who worked at OpenAI and Anthropic, resigned from Anthropic on Tuesday after concluding that competition among frontier AI labs was pushing them toward systems they may be unable to control.…

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