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Anthropic Ships Claude Fable 5.2 With Effort Tiers That Set the Bill

TL;DR Claude Fable 5.2 is an Anthropic language model aimed at long, open-ended technical work, released on 9 November 2026 alongside Claude Mythos 5.2, a second configuration of the same model. Fable carries the cybersecurity and biology safeguards that allow general availability, and Mythos opens…

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  1. 2026-11-12 19:00 · DEV Community — AI
    Anthropic Ships Claude Fable 5.2 With Effort Tiers That Set the Bill

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