Jacob Coxon Leaves Anthropic, Saying Catastrophic-AI Fears Inside the Lab Outrun Public Warnings

Former Anthropic pretraining researcher Jacob Coxon has resigned, saying colleagues inside the lab privately describe the next year or two as “crunch time for humanity” and that fears of catastrophic AI outcomes run deeper than the company’s public warnings. The 27-year-old Brit, who also spent years at OpenAI, argues that both labs are racing toward self-improving superintelligence without a workable plan to keep it under control.