Anthropic releases Claude Fable 5.2 and Mythos 5.2
Original title: Claude Fable 5.2 and Mythos 5.2
Fable is broadly available with cyber and biology safeguards; Mythos is limited to vetted programs and starts at $8 per million input tokens.
Anthropic upgraded Claude Fable and Claude Mythos, which share one underlying model, citing gains in coding, reasoning, and vision. Fable 5.2 is available to all users with cybersecurity and biology safeguards; organizations seeking beneficial cyber or biomedical use can apply for Mythos 5.2 through the Life Sciences and Cyber Verification Programs. Anthropic says outputs are up to 30% faster than the 5.1 models and that prerelease safety testing found high-stakes misalignment risk remains low.
Unconfirmed: Benchmark scores, physics results, the Fermat proof, and the low misalignment-risk assessment are Anthropic’s claims.
- Standard pricing is $8 per million input tokens and $40 per million output tokens.
- Optional fast mode costs $16 and $80 per million input and output tokens.
- Fast mode can speed token generation by up to 2.5 times.
- Anthropic recommends Claude Opus 5.5 for most coding and knowledge tasks.
- Vendors
- Anthropic
From the original article
14 min read at anthropic.com
We’ve upgraded Claude Fable and Claude Mythos—models that are designed to tackle the most daunting technical challenges. Claude Fable 5. 2 and Claude Mythos 5.
By meetpateltech · anthropic.com
A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.