Anthropic launches Fable 5.2 and Mythos 5.2, up to 30% faster at $8/M input tokens
emmanuelvivier · x · 2026-11-11
Anthropic released Claude Fable 5.2 and Mythos 5.2 on Nov 9 — the same underlying model, up to 30% faster than 5.1, priced at $8/M input and $40/M output tokens, with an optional fast mode (2.5x speed) at $16/$80. Fable carries cybersecurity and biology safeguards for all users; Mythos is available via the expanded Life Sciences and Cyber Verification Programs. Prerelease highlights: completing otherwise-infeasible software migrations, designing three working electronic devices from scratch, progress on two open black hole physics problems, and formalizing Fermat's Last Theorem in 30 hours. Safety testing included novel evals for sandbox escapes. The launch lands as the company advances its IPO.
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