NEW YORK - A British researcher has resigned from U.S. artificial intelligence developer Anthropic over fears that the race to develop "self-improving superintelligence" could lead to humanity's extinction.

Jacob Coxon, who previously worked on pretraining research at OpenAI and Anthropic, posted on X on Tuesday that "neither company is acting responsibly," and that the people building AI "earnestly believe that it could kill us all by the end of the decade."

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