“The people building AI earnestly believe that it could kill us all by the end of the decade.” On September 9, Jacob Coxon, a researcher who had worked on frontier-model pretraining at both OpenAI and Anthropic, announced that he was leaving Anthropic and issued a stark warning: the two companies’ race to develop increasingly advanced AI systems amounts to a gamble with the future of humanity. His post on X quickly reverberated across Silicon Valley, attracting more than 160 million views.
