Maple

Is Kimi open source?

Moonshot AI publishes Kimi K3.1 Pro weights for download under its own Kimi K3.1-Pro License, a license that is not on the Open Source Initiative’s approved list.

2 entries Versions 1 First entry Dec 2025 Latest Checked

Versions and licenses

Newest first · wording from each license file
VersionDateLicenseCommercial use, in the license’s wordsWeightsSourceChecked
Kimi K3.1 Pro Kimi K3.1-Pro License If the Licensee or any of its affiliates operates a Model as a Service business, and the aggregate revenue of the Licensee and its affiliates exceeds 20 million US dollars (or the equivalent in other currencies) in total over any consecutive 12 months, the Licensee must enter into a separate agreement with Moonshot AI before using the Software or its derivative works for any commercial purpose. Downloadable License file (opens in a new tab) · Entry

“Downloadable” means the weights are published for download under the license named in the row. It is not a statement about that license’s terms.

Dated entries

2026

1 entry

Release: Kimi K3.1 Pro weights under the Kimi K3.1-Pro License, with a separate agreement required for specified Model as a Service businesses.

Moonshot AI, Kimi K3.1 Pro weight-release announcement (primary source, opens in a new tab)

Details
On open weights Releasing the model weights of Kimi K3.1 Pro:

The November 4 release post links to Moonshot AI’s repository, where weight shards are available. The commercial threshold is aggregate licensee and affiliate revenue exceeding $20 million over any consecutive 12 months when they operate a Model as a Service business. Section 3 also requires prominent model-name display for products exceeding 100 million monthly active users or $20 million monthly revenue. Section 4 exempts defined internal use and use through official products or certified inference partners. The previous license shown is the Kimi K3 License.

License
Kimi K3.1-Pro License (opens in a new tab)
Commercial use
If the Licensee or any of its affiliates operates a Model as a Service business, and the aggregate revenue of the Licensee and its affiliates exceeds 20 million US dollars (or the equivalent in other currencies) in total over any consecutive 12 months, the Licensee must enter into a separate agreement with Moonshot AI before using the Software or its derivative works for any commercial purpose.
Weights
Downloadable
Previous license
Kimi K3 License (opens in a new tab)
Source type
Company page
Checked
Entry
#2026-11-04-kimi-k3-1-pro-weights

2025

1 entry

Evaluation: CAISI evaluates Kimi K2 Thinking, which it calls an open-weight model released November 6, 2025, and compares it with U.S. models.

NIST, CAISI Evaluation of Kimi K2 Thinking (primary source, opens in a new tab)

Details
On open weights Kimi K2 Thinking, an open-weight AI model released on November 6, 2025 by Moonshot AI.

The page says that at release Kimi K2 Thinking was the most capable model from a PRC-based developer in this evaluation and still lagged leading U.S. models, while its capabilities improved on the previous open-weight model frontier. It also says downloads a month after release were about 10 percent of DeepSeek R1's and under 5 percent of gpt-oss's.

Source type
Government publication
Checked
Entry
#2025-12-12-caisi-kimi-k2-thinking

All entries: 2 shown

Free to use

Cite this data

Free to quote, chart and republish under CC BY 4.0. All we ask is a credit with a link back. Sources keep their own terms. CC BY 4.0

Source: Maple, Open-weight AI policy: Kimi (maple.ai/open-weights/kimi), data through 2026-11-04.

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Every entry cites one primary source, quotes the document’s own words about open weights, and is checked against that source before it publishes. Corrections keep the old wording visible.
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