Sam Altman and Dario Amodei, leaders of major AI companies, sign a public letter urging action to prevent the development and misuse of AI-assisted bioweapons. The letter is described as a rare point of agreement among stakeholders who often disagree on AI policy and regulation. According to reports, Altman and Amodei join a broad coalition that includes other AI leaders as well as scientists, adding their names to a growing list of signatories concerned about risks from advanced AI systems. The letter calls for safeguards aimed at reducing the possibility that AI tools could be used to help design, develop, or facilitate biological weapons. The outlets note that the signers’ positions align on this specific issue, even though they differ on many other matters related to AI deployment and governance. By placing their names on the same document, the two CEOs publicly support the idea of stronger oversight and responsible controls to address biological security threats enabled by emerging technologies.