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Opus 5.5 and GPT-6 Sol dropped on the same day, so I lined up every benchmark I could find

This story is from 2026-09-22. It is preserved in the archive; the latest stories are on the live feed.

Anthropic and OpenAI both shipped new models today, GPT 6 Sol and Opus 5.5, and I wanted to pull up a proper head-to-head. On raw scores, Opus wins every benchmark in the table. The one that surprised me is GDPval, the "real office work" eval. Sol actually scores about 100 Elo lower than the GPT-5.…

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  1. 2026-09-22 19:55 · r/OpenAI
    Opus 5.5 and GPT-6 Sol dropped on the same day, so I lined up every benchmark I could find

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