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Grok 4.7 vs Claude Fable 5.1: reading the benchmarks, doing the token math, and wiring a router

This story is from 2026-10-09. It is preserved in the archive; the latest stories are on the live feed.

Two frontier models shipped three weeks apart. Claude Fable 5.1 landed September 1, 2026; Grok 4.7 landed September 21, 2026. They are not chasing the same target. Fable 5.1 is built around long-horizon reasoning and agents that stay alive for hours. Grok 4.7 is built around coding, agentic work, a…

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  1. 2026-10-09 05:25 · DEV Community — AI
    Grok 4.7 vs Claude Fable 5.1: reading the benchmarks, doing the token math, and wiring a router

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