Chinese AI start-up Moonshot has unveiled a massive new artificial intelligence model it says can take on top American firms, as the global technology sector faces heightened security scrutiny. The company launched Kimi K3 at the World Artificial Intelligence Conference in Shanghai on Friday, boasting 2.8 trillion parameters – a measure of scale and processing power that places it in the three-trillion-parameter class.
Kimi K3’s full capabilities in coding, knowledge work, and reasoning will be known when it is released as an open-source model on 27 July. That release will make it the world’s first open-source model of its size that can be freely downloaded, run and customised by outside developers – a direct challenge to closed, proprietary American systems from OpenAI or Anthropic.
“Moonshot AI unveils Kimi K3 with 2.8tn parameters, claiming to rival US firms ahead of open-source release.”
The launch comes just weeks after the US government abruptly forced American developer Anthropic to temporarily withdraw its flagship Fable and Mythos models due to severe cybersecurity concerns. While Washington has since lifted those restrictions, the initial move highlights how the US government now views advanced AI as critical national infrastructure, labelling frontier models as vital national security assets subject to strict export controls. But the rapid arrival of Kimi K3 suggests Chinese firms are successfully bypassing these regulatory barriers and advancing independently despite US restrictions on hardware sales.
Heavily backed by domestic tech giants Alibaba and Tencent, Moonshot has quickly risen to the forefront of China’s generative AI ecosystem. In a statement, the company said that K3 stands as its “most capable flagship model to date” and is uniquely built to operate with “minimal human supervision” to sustain tasks such as engineering and coding.
Third-party evaluations from Artificial Analysis and Arena.ai show the model performing on a par with leading US models such as OpenAI’s GPT and Anthropic’s Claude. In blind human-preference tests, Kimi K3 ranked first in web interface engineering, outperforming Anthropic’s Fable system. While the system’s massive size means running it locally requires significant computing equipment, making it open-source could heavily disrupt Silicon Valley’s commercial models.
The announcement had an immediate impact on shares in Moonshot’s domestic competitors Zhipu and MiniMax, which tumbled sharply in Hong Kong by about 27% and 16% respectively.