Fable 5.1's real gains are bigger than its Artificial Analysis index jump suggests

cedric_chee · x · 2026-09-02

cedricchee argues that Fable 5.1's jump looks modest on the Artificial Analysis Index but is actually bigger in practice, and predicts OpenAI's Astra is likely to out-cook Fable 5.1.

Related event: Anthropic Launches Claude Fable 5.1 and Mythos 5.1 with 75% Cheaper Caching(56 posts)→

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