He Left OpenAI and Anthropic Because They’re Betting Your Life on AI
Betting the Fate of All Humanity
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On September 8, 2026, a 27-year-old Briton posted a tweet on X. His name was Jacob Coxon. Over the previous three years, he had done model pretraining at OpenAI and then Anthropic, and he was one of the core contributors to the GPT-4o system card. Earlier this year, he left OpenAI for Anthropic because he identified with Anthropic's reputation for safety. Four months later, he resigned. Not just leaving Anthropic, but leaving the AI industry altogether.