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Combined test score
Epoch Capabilities Index · Epoch AI
Claude Opus 4.6 scores 3 points higher.
Chat answers, by people's votes
LMArena text, adjusted for style · LMArena
In blind votes, people pick Claude Opus 4.6 over Claude Sonnet 4.6 about 54% of the time.
Building apps, by people's votes
LMArena WebDev · LMArena
In blind votes, people pick Claude Opus 4.6 over Claude Sonnet 4.6 about 54% of the time.
Green marks the better of the two on each row, red the other. Rows where one side isn't listed, or where the gap is too close to call, stay plain.
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MAI-Image-2.6Not sure where to start? Which AI should I use? gives a pick for what you want to do. How to read AI rankings explains the numbers.
Rankings from LMArena and Epoch AI, both CC BY 4.0, updated . Developer prices, context windows and knowledge cutoffs from the labs' own listings on models.dev and from OpenRouter. The app links go to each maker's own app when no source says exactly where the model is available.