Moonshot AI releases Kimi K3.1 Pro weights free on Hugging Face

Moonshot AI had said at launch that it would release details about the Kimi K3.1 Pro weights by November 4, 2026, and the publication on Hugging Face followed through on that notice. The model had already been offered through Kimi.ai, the mobile app, and paid tools including Kimi Work, Kimi Code, and the Kimi API, so the weight release extends access beyond those channels to anyone willing to download and run it.

The licence structure draws a line at commercial model hosting: general use is permitted, but a provider running a Model as a Service with revenue above $20 million over 12 consecutive months must arrange a separate contract with Moonshot AI. That condition targets larger hosting operations rather than individual developers or smaller teams, though the exact terms of any such agreement are not described.

Moonshot also presented the model as offering major improvements in coding, 3D creation, financial research, and other agent functions, and as achieving high completion when combined with external tools such as Unity, Unreal Engine, and Godot. The free weight release gives developers a way to test those claims directly rather than only through the hosted tools.