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Fable 5.1 outperforms Fable 5, Opus 5, and GPT‑5.6 Sol. Isn't time to reveal GPT-6 Astra?

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

I tried Fable 5.1 and I can confirm it already surpasses Fable 5, Opus 5, and GPT‑5.6 Sol. While its results are ALMOST impressive, but he cost of Fable 5.1 is unacceptably too high(the DNA of Anthropic and its weak point). Considering Astra’s evaluations by OpenAI HERE show dramatically better opt…

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  1. 2026-09-02 10:32 · r/OpenAI
    Fable 5.1 outperforms Fable 5, Opus 5, and GPT‑5.6 Sol. Isn't time to reveal GPT-6 Astra?

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