42 mathematicians, including Fields Medalists, warn of AI existential risk

Forty-two Fellows of the Royal Society, including Fields Medal winners Martin Hairer and Peter Scholze, signed an open letter warning that AI existential risk is real and urgent. They note leading models have already solved open research problems within months and warn similar capabilities could extend to cyberweapons or bioweapons.

Why it matters: Signatures from mathematicians of this caliber carry different weight than typical AI-safety statements, since they're judging capability trends from direct research experience rather than policy analysis. It adds to a summer of escalating warnings from EU officials and extinction-risk surveys, though it lands alongside pushback elsewhere this week arguing specific risks like bioweapons are overstated.