The Trump administration has accused Chinese start-up Moonshot AI of covertly extracting capabilities from leading US artificial intelligence models and obtaining restricted Nvidia chips abroad, escalating Washington’s scrutiny of the company following the release of its powerful Kimi K3 model. Michael Kratsios, the White House science and technology adviser, alleged on Wednesday that the Beijing-based company had targeted Anthropic’s most powerful model, Claude Fable 5, through large-scale...