Fable 5.1 launches with 75% cheaper cache reads

EricBuess · x · 2026-09-02

Fable Studio released Fable 5.1 and Mythos 5.1. The new version progresses further into tasks before requiring input, explicitly states when stuck, and targets root causes. Pricing remains unchanged, but cache reads are now 75% cheaper.

Related event: Anthropic Launches Claude Fable 5.1 with 75% Cheaper Caching and Secure Mythos 5.1(33 posts)→

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