GoKawiilAnthropic releases Claude Fable 5.2 and Mythos 5.2 models
Anthropic has launched Claude Fable 5.2, available immediately, alongside Claude Mythos 5.2, which is initially restricted to vetted organizations. The company says both models improve on coding, reasoning, vision and output speed compared to the 5.1 versions released in September.
GoKawiil's interpretation of the reporting above, not reported fact.
Anthropic's claims about solving open physics problems and formalizing a proof of Fermat's Last Theorem suggest the company is positioning these models as tools for serious scientific and engineering work, not just consumer chat applications. The restricted rollout of Mythos 5.2 to vetted organizations could indicate Anthropic is being cautious about the model's capabilities or potential misuse, though the company has not stated this as a reason.
- Claude Fable 5.2 launched broadly today, while Mythos 5.2 access is limited to vetted organizations.
- Anthropic claims the models solved two open theoretical physics problems and formalized Fermat's Last Theorem in 30 hours during testing.
- Both models reportedly improve on coding, reasoning, vision, and speed over the September-released 5.1 versions.
Source: theverge.com — Jay Peters, 2026-11-09
Published there as: “Anthropic launches new Claude Fable and Mythos 5.2 models”
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