Anthropic ships Claude Fable 5.2 & Mythos 5.2: Fermat proof in 30 hours, lower prices
Dr_Singularity · x · 2026-11-10
Anthropic released Claude Fable 5.2 and Claude Mythos 5.2 — the same underlying model, positioned for science, math, coding, robotics and hardware engineering.
Prerelease highlights
- Completed otherwise-infeasible software migrations; designed three working electronic devices from scratch
- Solved two open black-hole physics problems
- Formalized the proof of Fermat's Last Theorem in 30 hours
Product details
- Up to 30% faster outputs than 5.1; priced at $8/M input, $40/M output
- Optional fast mode (2.5x speedup) at $16/M input, $80/M output
- Fable ships with cybersecurity/biology safeguards for all users; Mythos access requires the Life Sciences or Cyber Verification programs
- Extensive prerelease safety testing, including novel evals for sandbox-escape behaviors
Related event: Anthropic Launches Claude Fable 5.2 and Mythos 5.2(41 posts)→
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