Center for AI Safety — campaign: Statement on AI Risk (May 2023): one-sentence statement 'Mitigating the risk of extinction from AI should be a global priority alongside other societal-scale risks such as pandemics and nuclear war.' Signed by 350+ AI leaders including Geoffery Hinton, Demis Hassabis, Sam Altman, and Dario Amodei.

NoteThe claim is substantially confirmed regarding the statement text, the campaign name, the four named signatories, and the general timeframe (May 2023). However, the source excerpt does not explicitly state the total number of signatories as '350+'. While the source clearly indicates more signatories exist (via 'Show more'), the exact count of 350+ cannot be verified from this excerpt alone. This makes the claim partially confirmed rather than fully confirmed.