Moonshot AI Releases Kimi K3.1 Pro Weights for Free Download
Moonshot AI has published the weights of Kimi K3.1 Pro on Hugging Face, free for anyone to download and use under the license.
1 source 5d ago
Reporting from 1 source: GIGAZINE.
Why it matters
Moonshot AI has moved Kimi K3.1 Pro from a hosted product to a downloadable open-weight model, putting a 2.8 trillion parameter system into the hands of anyone willing to accept the license terms.
Key Facts
- Moonshot AI released the weights of Kimi K3.1 Pro for free on Hugging Face.
- Kimi K3.1 Pro has 2.8 trillion total parameters and 104 billion active parameters.
- The Kimi K3.1 Pro context window reaches up to 1 million tokens.
- The license requires a separate contract with Moonshot AI if a Model-as-a-Service operator's sales exceed 20 million dollars over 12 consecutive months.
- Moonshot AI announced Kimi K3.1 Pro on October 24, 2026, and published the weights after saying they would arrive by November 4.
The model, announced on October 24 and originally slated for weights by November 4, has 2.8 trillion total parameters with 104 billion active and a context window up to 1 million tokens. The license requires a separate contract with Moonshot AI if a Model-as-a-Service operator exceeds 20 million dollars in sales over 12 consecutive months.
The release on Hugging Face follows the October 24 announcement, when the model was offered through Kimi.ai, the mobile app, and paid tools Kimi Work, Kimi Code, and Kimi API. The weights carry a license with one clear condition: a Model-as-a-Service operator whose total sales exceed 20 million dollars over 12 consecutive months must negotiate a separate contract with Moonshot AI. The model's context window reaches up to 1 million tokens, and the company describes improved coding, 3D creation, and financial research functions, with results when combined with tools such as Unity, Unreal Engine, and Godot.
Written with AI by Yomimono from the 1 cited source below, including Japanese-language reporting where cited. See our editorial policy.
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Sources
- GIGAZINE 「Kimi K3.1 Pro」の重みが無料で公開される