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Claude Fable 5.1 Benchmarks: Every Number Compared

This story is from 2026-09-02. It is preserved in the archive; the latest stories are on the live feed.

Fable 5.1 more than doubles Fable 5 on Terminal-Bench-Science, 52.6 percent against 24.7 Cache reads drop from 1.00 to 0.25 dollars per million tokens, a 75 percent cut that input and output pricing do not show It beats Opus 5 on all nine published benchmarks, but the gaps range from 0.4 points to…

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  1. 2026-09-02 00:46 · DEV Community — AI
    Claude Fable 5.1 Benchmarks: Every Number Compared

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