Introducing Kimi K3.1 Pro: our most capable 3T-class open-weight model.

🔹 1M-token context, 2.8T total / 104B active params (MoE), Multimodal.
🔹 Full-project coding: games in Unreal, Unity & Godot.
🔹 Excels at parametric 3D modeling in Blender & CAD.
🔹 More reliable at finance work: Accurate modeling with hallucination down by 65%.
🔹 Matching the strongest proprietary models across coding, agentic and knowledge benchmarks.

Kimi K3.1 Pro and K3.1 Pro Highspeed (2–3× faster) are now live on Kimi.ai, Kimi Work, Kimi Code, and the Kimi API.

Open weights by Nov 4, 2026.

🔗 API: platform.kimi.ai
🔗 Tech blog: kimi.ai/blog/kimi-k3-1-pro

On Terminal-Bench 4.0, which evaluates coding agents on realistic, resource-constrained terminal tasks using strict task-specific tests, K3.1 Pro scores 65.7%, ahead of GPT-6 Astra (58.2%) and narrowly behind Claude Opus 5.5 (66.4%).

K3.1 Pro works directly in the tools used by the 3D modeling and game industries - Blender, Unreal Engine, Godot, and CAD.
On BenchCAD, which tests 3D reconstruction from multi-view renderings through CAD code generation, it scores 92.7% with tools, approaching Claude Opus 5.5 (96.2%) and GPT-6 Astra (95.9%).
K3.1 Pro can deliver a fairly complete project, from asset construction to scene assembly, animation, and rendering.

K3.1 Pro is SOTA on OfficeQA Pro v2 (64.4). On internal benchmarks, it improves over K3 by 7.2 points on financial modeling and 11.6 points on financial research, and scores ~4.2× K3 on simulated business operation.

Example outputs: an NVDA DCF/LBO model with fully linked statements and traceable formulas, a CATL investment-committee deck, and a quantum-computing sector report with source-level citations.

K3.1 Pro API and K3.1 Pro Highspeed (2-3× faster), both available now at platform.kimi.ai.

Full tech blog at:
kimi.ai/blog/kimi-k3-1…