Anthropic Launches Fable 5.2 and Mythos 5.2
Anthropic has released Fable 5.2 and Mythos 5.2, which it says improve on their predecessors across coding, reasoning, vision, cybersecurity and biology. CNET reports that the models generate output up to 30% faster and are available at lower prices, while Anthropic’s benchmark data reports a rise from 32.4% to 49.1% on an agentic coding test for Fable 5.2 and from 61.7% to 76.3% on a cybersecurity benchmark for Mythos 5.2. Mythos 5.2’s cybersecurity features are currently restricted to participants in Anthropic’s Cyber Verification Program, and Fable 5.2 includes guardrails for risky cybersecurity and advanced biology activities.
The release combines lower prices and faster output with vendor-reported gains in coding and cybersecurity, but Mythos 5.2’s restricted cybersecurity access limits current availability.
Anthropic took the wraps off yet another set of AI models on Monday, Fable 5.2 and Mythos 5.2, which are ready to use and make substantial improvements over their predecessors. While an average user may not see the benefits of the latest models, Anthropic says they’re best for the “most ambitious, open-ended work.”
The new Claude models show greatly improved metrics in areas like coding (don’t they all?), reasoning, vision, cybersecurity and biology. The latter of which have strong safeguards against misuse in the Fable model, which give Anthropic enough confidence to release it to the public.
Fable 5.2 and Mythos 5.2 generate output up to 30% faster than their predecessors and are available at lower prices — a trend we’ve continued to see lately with most new AI model releases.
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