New Benchmarks for Anthropic's Fable 5.1 Show Incremental Gains

Justwalkingthru3 · reddit · 2026-09-02

A Reddit post aggregates benchmark results for Anthropic's Fable 5.1 model, released by engineer Felix Rieseberg. The data indicates a slight performance improvement over the previous version. The poster suggests that OpenAI's upcoming Astra model could potentially surpass these scores shortly.

Related event: Anthropic's Fable and Mythos 5.1 Benchmark Scores Leak(2 posts)→

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