Pretraining researcher quits Anthropic: OpenAI and Anthropic are "gambling with our lives"

EthanJPerez · x · 2026-09-10

A researcher who spent three years doing pretraining research at both OpenAI and Anthropic has resigned, saying neither company is acting responsibly and both are "racing straight to self-improving superintelligence and gambling with our lives." @theo pushes back on accusations that Jacob is faking it for clout: he is highly regarded in the research community, backed by Anthropic coworkers, and has far more to lose than to gain. The resignation, paired with his "burn my equity for a 1% better survival odds" remark, marks a visible safety-vs-speed split inside frontier labs.

Related event: Anthropic safety researcher quits, warning of existential AI risk(119 posts)→

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