Center for AI Safety (CAIS) — 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 source confirms the core claim elements: the exact one-sentence statement, the campaign's existence, and the presence of the four named signatories (Hinton, Hassabis, Altman, Amodei). However, the source text provided does not explicitly state '350+' signatories. The source shows 'Show more' at the end of the signatory list, indicating additional signatories exist beyond those displayed, but the total count is not stated in the excerpt provided. The claim's temporal marker 'as of 2023-05' cannot be verified from the source text alone, though the statement is dated May 2023 based to external knowledge. The '350+' figure is a specific quantitative claim that the source excerpt does not confirm or contradict—it is simply unaddressed in the provided text.