Moonshot AI Releases Kimi K3, a 2.8-Trillion-Parameter Open-Weight Model Aimed at U.S. Frontier Labs

Moonshot AI, the Beijing-based startup behind the Kimi assistant, has launched Kimi K3, a 2.8-trillion-parameter model it bills as the first open-weight system at the roughly three-trillion-parameter scale, with API access available now and full model weights due to be released on July 27. The launch, which began quietly through the company's API platform documentation and Moonshot's website on or around July 16, has quickly drawn attention as one of the most ambitious attempts yet by a Chinese lab to match the closed frontier models of OpenAI and Anthropic while keeping the underlying weights open.