Kimi K3.1 Pro Overview

Kimi K3.1 Pro is Moonshot AI's flagship open-weight model, a post-trained successor to Kimi K3 built for coding, agent workflows, and knowledge-intensive work. It pairs a 1M-token context window with always-on reasoning at configurable effort, image understanding, structured outputs, and tool calling, and improves on K3 in coding, 3D modeling, financial analysis, and factual accuracy. It is well suited to coding agents that build full projects and games, scripted 3D and CAD modeling in tools such as Blender, and research assistants that work through financial documents and spreadsheets.