Inside Kimi K3: How It Built Its Own Chip, New Open-Weight Licence, and More

Chinese AI company Moonshot AI has released the Kimi K3 model family, a 2.8-trillion-parameter model that the company claims outperforms Claude Opus 4.8 and GPT-5.5 on several benchmarks. The model was trained on custom hardware designed by Moonshot, indicating a significant investment in vertical integration. The release includes a new open-weight license, details of which have not been fully disclosed.

The custom chip design and open-weight license are notable departures from Moonshot's earlier practices.

The release comes amid ongoing competition between US and Chinese AI labs, with export controls limiting Chinese access to advanced semiconductors. Moonshot's ability to design its own chip may indicate successful adaptation to these restrictions. The open-weight license could accelerate adoption but also raises concerns about potential misuse, as open-weight models can be fine-tuned without restrictions.