Anthropic's Fable 5.2 formalizes Fermat's Last Theorem in 30 hours
Anthropic just released Claude Fable 5.2 and Mythos 5.2, bringing upgraded frontier reasoning at 30% faster speeds and 20% lower API prices. During testing, teams of 1,000 Fable agents built a bootable OS in 8 days and formalized Fermat's Last Theorem in just 30 hours. Mythos remains restricted to vetted researchers, while Fable is rolling out to paid subscribers.