Moonshot AI's Kimi K3.1 Pro Tops Artificial Analysis Index at 55
Moonshot AI announced Kimi K3.1 Pro on October 24, 2026, a 2.8-trillion-parameter MoE model with 104 billion active parameters and a 1-million-token context window. On the Artificial Analysis Intelligence Index v4.3.2 it scored 55, above Claude Fable 5.1, GPT-6 Astra, and Gemini 4 Argon at 53. The model arrives free of charge on November 4, 2026, with API pricing at $2.00 input and $10.00 output per million tokens.