Moonshot releases Kimi K3.1 Pro, remaining the open-source model with the largest parameter scale globally

Moonshot released its new-generation open-source model Kimi K3.1 Pro on October 24, with a parameter scale of 3 trillion, support for a 1 million token context window, remaining the open-source model with the largest parameter scale globally, with full model weights to be released before November 4. Reports say its overall intelligence level is already close to the world's leading closed-source models, at only one-fifth the price of GPT 6 Astra; according to the Artificial Analysis leaderboard, Kimi K3 Pro ranks 4th on the intelligence index, first among global open-source models. According to the introduction, the model substantially increased compute investment in the reinforcement learning stage, has stronger professional tool-calling capabilities, improved capabilities in coding, 3D creation, financial research and long-horizon Agent tasks, and achieved the world's best results on two evaluations, Office QA Pro v2 and SpreadsheetBench v2, surpassing closed-source models such as Opus 5.5, Fable 5.1 and GPT 6 Astra.