Moonshot AI releases Kimi K2, a 1-trillion-parameter open-weights agentic model
Partly confirmed
The takeaway
Beijing-based Moonshot AI open-sourced Kimi K2, a 1T-parameter mixture-of-experts model (32B active) optimized for agentic tasks and coding, among the strongest open-weight non-reasoning models at release.
Status
- Claim
Partly confirmed
- Our reporting
- Medium confidence
- Importance
- 3 of 5
- Last verified
- 29 September 2026
Your AI and this story
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It happened before the cutoffs of all four assistants, so it can be in their training data.
Key facts
- Released 11 July 2025
- 1 trillion total parameters, 32B activated
- Trained with the MuonClip optimizer on 15.5T tokens
- Released under a modified MIT license
What happened
Moonshot released open weights for a trillion-parameter model focused on tool use and coding.
Why it matters
Part of a 2025 wave (DeepSeek, Qwen, Kimi, GLM) that made Chinese labs the leaders in open-weight models.
Sources
2 sources from 2 sites. Numbers match the chips in the text.
2 sources: 2 primary
Primary
- Kimi K2: Open Agentic Intelligence (Moonshot AI)moonshotai.github.io, official
- MoonshotAI/Kimi-K2 (code & weights)github.com, code
Changes
- Filed