Kimi K3 tops Arena's coding leaderboard — and it's open-weight
Moonshot AI's open-weight Kimi K3 scores 57.1 on the Artificial Analysis Intelligence Index, third behind Fable 5 (59.9) and GPT-5.6 Sol (58.9) but ahead of Opus 4.8, and ranks #1 on BrowseComp, Automation Bench, and SpreadsheetBench 2. Weights are expected to drop July 27.
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