Summary & Key Takeaways ​

• Moonshot AI has released the weights for their 2.8 trillion parameter Kimi K3 model.
• The model weights are a substantial 1.56TB and are available on Hugging Face.
• Kimi K3 uses an "open weight" license, not an "open source" license.
• The license requires prominent attribution for commercial products exceeding 100 million monthly active users or $20 million monthly revenue.
• A separate agreement with Moonshot AI is mandatory for Model as a Service businesses with over $20 million in aggregate revenue over 12 months.
• Moonshot AI explicitly avoids calling their license "open source," consistently using "open weight."
• Kimi K3 is already available through OpenRouter from multiple providers.

Our Commentary ​

This Kimi K3 release is a big deal, not just for the model's size, but for that license. "Open weight" is becoming a common dodge, and this one is particularly aggressive with its commercial restrictions. We're seeing a clear trend here: companies want the community to help improve their models, but they want to control the monetization. It feels like a new frontier for licensing battles. I genuinely wonder how sustainable this model is for true innovation. It's a fascinating, if slightly unsettling, development.