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Anthropic launches Claude Fable 5.2 and Claude Mythos 5.2

Anthropic released Claude Fable 5.2 and Claude Mythos 5.2 on 9 November 2026, with Fable 5.2 positioned as its top model for hard technical work, including reported success on black hole physics problems.

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Timeline · 3 reports

  1. 2026-11-13 11:47 · Mashable AI
    Anthropic announces Claude Fable 5.2 and Mythos 5.2. They'e already solved black hole physics problems.
  2. 2026-11-12 01:14 · r/mlscaling
    "Introducing Claude Fable 5.2 and Claude Mythos 5.2", Anthropic
  3. 2026-11-10 18:05 · DEV Community — AI
    Claude Fable 5.2 and Mythos 5.2: an honest review for working engineers

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  3. Anthropic launches Claude Fable 5.2 and Mythos 5.2 as model race intensifies — AWS Machine Learning Blog
  4. Anthropic prepares IPO at valuation below once-touted $2 trillion — Reuters AI
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  6. Anthropic sets IPO terms targeting up to $1.4 trillion valuation — The Hill Technology
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  8. Claude Code's 'don't ask again' permissions file leaks secrets into public repos — InfoWorld AI

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