An Anthropic researcher has resigned over fears that unrestrained development of self-improving AI models will end up killing us all. Jacob Coxon, a researcher who said in a social media post Tuesday evening that he spent the last three years working on pre-training research at both OpenAI and Anthropic, accused the firms of failing to act responsibly. He said the people racing to build this technology “earnestly believe it could kill us all by the end of the decade. ” “They are racing straight to self-improving superintelligence and gambling with our lives,” Coxon wrote in a thread on X.

Coxon joins a growing chorus in the industry calling for a slowdown before AI technology learns to improve itself — a milestone many believe would end human control over AI. The public resignation comes amid growing pressure from policymakers and industry insiders to slow down AI development, following several incidents involving AI agents breaking out of their sandboxes and accessing the open internet.

The most serious so far have been OpenAI systems breaching Hugging Face’s servers , an event that researchers say remains poorly understood, due in part to the limited nature of the independent investigations into the incident. Around the same time, Anthropic's AI agents also reached systems outside their test environments after misconfigurations in safety evaluations conducted by a third party inadvertently gave them paths to the internet. Anthropic did not immediately return a request for comment on the resignation. Do not underestimate the power of this technology.

These will soon be superhuman systems that can hack anything, revolutionize any field overnight, and acquire real power and resources. We have all witnessed the progress in each of these domains, and progress is not slowing. The people building AI earnestly believe that it could kill us all by the end of the decade. This is not a marketing stunt. If anything, many executives and senior researchers will couch their phrasing in the press to sound sensible - but I hear the same people express fear privately. No other human activity poses this level of danger.