Moonshot’s Kimi K3.1 Pro matches frontier models and will release full weights by November 4, narrowing the gap between open and closed AI.

KIMI K3.1 PRO ARRIVES Moonshot AI released Kimi K3.1 Pro today. It is not yet open weights, but the full model weights will be published by November 4, 2026. PERFORMANCE K3.1 Pro scores 55 on the Artificial Analysis Intelligence Index, ahead of GPT-6 Astra and Claude Fable 5.1, and only 3 points behind Claude Opus 5.5. On Terminal-Bench 4.0 it scores 65.7%, ahead of GPT-6 Astra and narrowly behind Opus 5.5. On Kimi Code Bench 3.0 Long-horizon it scores 61.2%, up from 55.95% for K3. PRICING Input tokens are $2 per million, output tokens $10 per million. A Highspeed variant is 2-3x faster at twice the price, except for input token cache hits. CONTEXT 1 million token context window. 2.8T total parameters, 104B active. Text and image input modalities. IMPACT This is the first time a soon-to-be open weight model has scored this highly against the frontier. Once weights are released, K3.1 Pro will be the highest-scoring open weights model, narrowing the gap to proprietary leaders from 12 points to 3. NORDIC RELEVANCE For Nordic builders, this changes the calculus on self-hosting. The network must decide whether to integrate K3.1 Pro into the stack when weights drop, or hold for local-first architectures to mature further.

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