Anthropic releases Claude Fable 5.2 and Mythos 5.2

Anthropic said on Nov. 9 that Claude Fable 5.2 is available to all users and that Claude Mythos 5.2 is the same model with more permissive cybersecurity and biology safeguards for verified organizations. The company priced both at $8 per million input tokens and $40 per million output tokens, with an optional fast mode at $16 and $80, and its docs list a 1 million token context window and a 128,000 token output limit. Anthropic says prerelease testing included two black-hole calculations and a 30-hour formalization of Fermat's Last Theorem; those are company claims, and the cited preprints were not opened.