Anthropic Unveils Claude Fable 5.2 and Claude Mythos 5.2 For Advanced Coding, Cybersecurity

Anthropic, an AI technology leader, has unveiled two advanced AI models that specialize in advanced coding, cybersecurity, robotics, and scientific research. The two models, Claude Fable 5.2 and Claude Mythos 5.2, share the same foundation but are tailored for different user needs. Claude Fable 5.2 is available to all users and is designed to work independently for extended periods, coordinating multiple AI agents and managing intricate software projects.

On the other hand, Claude Mythos 5.2 is restricted to organizations pursuing beneficial applications in cybersecurity or biomedical research through Anthropic's Life Sciences and Cyber Verification Programs.

Both models show significant improvements in mathematical reasoning, such as formalizing a proof of Fermat's Last Theorem with help from nearly 1,000 AI agents within 30 hours. Additionally, they have designed functional electronic devices, improved robotics task performances, and contributed to unresolved theoretical physics problems, particularly those related to black holes.

Anthropic priced the models at $8 per million input tokens and $40 per million output tokens. For users who require faster token generation, a "fast mode" is available for an additional cost of $16 per million input tokens and $80 per million output tokens. The company is expected to begin its IPO process by November 10, 2026, with a potential valuation between $1.1 trillion and $1.3 trillion, which would surpass the previously discussed $1.5 trillion to $2 trillion range.