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Moonshot have released the weights for their 2.8 trillion parameter Kimi K3, a 1.56TB download on Hugging Face.
Moonshot AI released the open-weight Kimi K3 model with 2.8 trillion parameters, available on Hugging Face. ✦ AI generated
Author · Simon Willison's Weblog · 2026-07-27 · original ↗
As promised a few weeks ago, Moonshot have released the weights for their excellent 2.8 trillion parameter Kimi K3. They're a hefty 1.56TB on Hugging Face.
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explains mechanism → OpenRouter is already offering K3 from 7 providers, most at the same $3/million input and $15/million output tokens as Moonshot AI themselves.Author · Simon Willison's Weblogprovides context → Kimi K3 is an 'Open Frontier Intelligence' model with 2.8T total parameters, 1M-token context, native multimodal input, Kimi Delta Attention (KDA), and Attention Residuals, live on Kimi.com, Kimi Work, Kimi Code, and API, with open weights promised by July 27, 2026.Moonshot AI · Latent Spaceprovides context → K3's license drops the 'modified MIT' label and goes further — companies running a Model-as-a-Service business with aggregate revenue exceeding $20M over 12 months must enter a separate agreement with Moonshot before any commercial use.Author · Simon Willison's Weblogprovides context → Kimi makes no attempt to describe this as an 'open source' license, consistently using the term 'open weight' instead — which is honest.Author · Simon Willison's Weblogprovides context → Moonshot AI's latest open model, Kimi K3, is on par with Anthropic's Fable 5, which could trigger US regulation or banning of Chinese open models to protect US labs.The Pulse · The Pragmatic Engineer