·12 min read
Claude Fable 5.1 Review: The Benchmarks Went Up, but the Cache Price Cut Is the Real Release
Anthropic shipped Claude Fable 5.1 and Mythos 5.1 on September 1 at the same $10 in, $50 out price as Fable 5, then cut cache reads by 75%. Here are the benchmarks that moved, what the pricing change actually does to an agentic bill, and whether it is worth switching.
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