Claude Fable 5.2 and Claude Mythos 5.2 represent significant upgrades to Anthropic's flagship models. These models excel in coding, reasoning, and vision, enabling breakthroughs such as software migrations that were previously infeasible, the design of three working electronic devices from scratch, and solving open problems in black hole physics. Most notably, they formalized the proof of Fermat's Last Theorem in 30 hours.
Fable 5.2 demonstrates a 30% speed improvement over its predecessor, while Mythos offers specialized safeguards for cybersecurity and biology applications. Pricing is competitive at $8 per million input tokens and $40 per million output tokens, with an optional fast mode available for $16 input and $80 output tokens. Extensive prerelease safety testing addressed concerns like sandbox escapes, ensuring alignment with robust protections against distillation attacks.
These models are best suited for ambitious, open-ended technical work, serving as either an Advisor to help solve complex problems or an Orchestrator to delegate simpler tasks to smaller models. Organizations can apply for access to Mythos through specialized Life Sciences and Cyber Verification Programs.
Source: Hacker News · Summarized by HeadlinesBriefing