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Compare two models.
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SwapGrok 4.6
xAI's Grok 4.6 is a very large hosted model for answering questions and writing text, available to developers through xAI's services.
Release page →Kimi K3
Moonshot AI's Kimi K3 is a very large model that can read text, images and video, free to download for research and non-commercial use and aimed at long coding and knowledge-work tasks.
Release page →The basics
Released
What it does
Knowledge cutoff
The latest events it learned about
Download
Price and limits, for developers
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How they score
Combined test score
Epoch Capabilities Index · Epoch AI
Too close to call: Grok 4.6 and Kimi K3 are within the margin of error.
Chat answers, by people's votes
LMArena text, adjusted for style · LMArena
In blind votes, people pick Kimi K3 over Grok 4.6 about 54% of the time.
Building apps, by people's votes
LMArena WebDev · LMArena
In blind votes, people pick Kimi K3 over Grok 4.6 about 56% 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.