The allegations come as Chinese AI companies are facing increased US government scrutiny.

A White House adviser has accused China's Moonshot AI of a "large scale" effort to steal the capabilities of top US artificial intelligence (AI) models. US President Donald Trump's Science and Technology adviser Michael Kratsios said Moonshot AI carried out the campaign through what is known as distillation - when a weaker AI model extracts answers from a stronger one. Moonshot also gained access to restricted cutting-edge Nvidia servers to train its models, Kratsios said in a social post, external on Wednesday. The BBC has contacted Moonshot, the Chinese embassy in Washington, Anthropic, the White House, and Nvidia for comment. Kratsios said on X that the US government has information that Moonshot AI "distilled" capabilities from Anthropic's Fable AI for the development of its K3 model. Kimi K3 gained attention around the world after it was unveiled last week, with many believing it to have narrowed the gap between Western and Chinese AI models. Moonshot said its K3 model is able to rival top US technology. Moonshot is likely to have also used servers powered by Nvidia's GB300 Grace Blackwell computing platform, Kratsios said. Washington restricted the export of Nvidia's most advanced chips in 2022 over concerns that they could be used by the Chinese military.