Fable 5.1 beats Opus 5 in coding benchmarks

firstadopter · x · 2026-09-02

Fable 5.1 scores 55.8% on Terminal-Bench 4.0, outperforming Fable 5 (42%) and Opus 5 (52.3%). It also leads in agentic coding and computer use evals.

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

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