Concerns about AI safety are reaching a fever pitch in the U.S. after a X post by a former Anthropic researcher went viral, claiming the technology could kill all of humanity by the end of the decade. In response, the CEOs from OpenAI and Anthropic have reiterated their calls for the U.S. to coordinate with China to slow and pace AI development. OpenAI CEO Sam Altman even tried to appeal to the egos of the leading figures, telling Fortune in an interview Friday that he believed U.S. President Donald Trump and Chinese President Xi Jinping could win the Nobel Peace…