
Kimi K3.1 Pro Unveiled: A 2.8 Trillion Parameter Open-Weight Agent and Coding Model
Moonshot AI has unveiled Kimi K3.1 Pro, its flagship open-weight multimodal reasoning model. Built on a Sparse Mixture-of-Experts (MoE) architecture with 2.8 trillion total parameters (104 billion active per token) and a 1 million token context window, the model performs on par with closed-source rivals in long-horizon software engineering, parametric 3D/CAD modeling and financial analysis tasks while offering 33% lower API costs.



















