Coding, 3D creation, and financial research with open weights. Kimi K3.1 Pro is Moonshot AI's multimodal MoE with 2.8T total parameters, 104B active, and a 1M-token context. 🤖 💻 Stronger coding execution: Scores 65.7 on Terminal-Bench 4.0. On the internal Kimi Code Bench 3.0 Long-horizon, it improves from K3's 55.95 to 61.2. 🔎 Research with tools: Reaches 70.0 on HLE-Full with tools and 92.1 on BrowseComp in the published evaluations. 🧊 Build and refine 3D assets: Writes and runs Blender and CAD scripts, scoring 92.7 Voxel IoU on BenchCAD with tools. 🏆 Financial document analysis: Achieves SOTA on OfficeQA Pro v2 at 64.4, covering retrieval, cross-document verification, and multi-step numerical reasoning. ✅ Fewer unsupported claims: Claim-level hallucinations fall from K3's 23.4% to 8.3% on the internal Kimi Hallu Bench Hard with tools, a stress test rather than a measure of everyday error rates. 📜 Kimi K3.1-Pro License; commercial-use and attribution conditions apply.