Kimi K3.1 Pro tops MathArena open models, closing frontier gap to about 6 months
teortaxesTex · x · 2026-10-26
MathArena added Kimi K3.1 Pro: 63.52% accuracy on BrokenArxiv ($2.77, 132K tokens), third only behind GPT-6.1 Sol (82.70%) and Claude-Opus-5.5 (76.73%), ahead of DeepSeek-V4.1-Flash and Gemini 4 Argon. Its estimated overall performance is near GPT-5.5 (Apr 24), putting the open frontier about 6 months behind; teortaxesTex notes Kimi wasn't even math-targeted.
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