OpenAI-then-Anthropic pretraining researcher Jacob Coxon resigns, saying both labs are racing to self-improving superintelligence and gambling with lives. Follow-ups: private staff fear of decade-scale extinction; Anthropic understands the stakes but is locked in the race; pacing agreements more viable after Hugging Face.

Quoted text

I resigned from Anthropic today. I spent the last three years doing pretraining research at both OpenAI and Anthropic. Neither company is acting responsibly. They are racing straight to self-improving superintelligence and gambling with our lives. More thoughts below.

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Analyst rationale

Primary source, not a rumour. A named pretraining researcher leaving both leading US labs is a governance signal: the internal brake is a resignation letter, not a delay right. Corroborated the same night by Anthropic's Alignment Science lead.