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Model Card: Kimi K3.1 Pro

Kimi K3.1 Pro: released 2026-10-23, 2.8T total / 104B active MoE parameters, 1M-token context window, $2.00 input / $10.00 output per 1M tokens (33% below K3); independent testing put Terminal-Bench 4.0 at 67% (up from K3's 13%), and it ranks 4th worldwide on the Artificial Analysis Intelligence Index at 55.1; weights aren't public yet — Moonshot promises open release by 2026-11-04, at which point it's projected to become the highest-scoring open-weight model available

Kimi——From a 200K Long-Context Tool to a 2.8T Open-Source Frontier, and K3's Architectural Leap

Kimi is Moonshot AI's LLM family, born from ultra-long context. Kimi K3 (2026/07) is the world's first open 3T-class model—2.8T params, 104B active, 1M context, scoring 60 on the Artificial Analysis Intelligence Index tied with GLM-5.3 for open-source #1. Its Kimi Delta Attention brings a 2.5× scaling efficiency gain.