US Official Alleges Chinese AI Apps Used Banned Chips

A Bloomberg report says a White House science official accused China’s Moonshot AI of using banned Nvidia GB300/Blackwell chips and possibly distilling output from U.S. models such as OpenAI and Anthropic to build Kimi K3. The U.S. Bureau of Industry and Security is reportedly investigating whether Chinese AI firms accessed advanced U.S. AI chips, which could signal tighter export-control enforcement and greater scrutiny of cross-border AI development. The allegations add fresh friction to U.S.-China tech relations just as both sides had been trying to preserve dialogue ahead of a potential Trump-Xi summit in Washington on September 24. For markets, the story is supportive for the AI supply-chain and export-control narrative: it raises headline risk for China AI developers while reinforcing the strategic importance of Nvidia’s hardware ecosystem and the possibility of more policy-related volatility in semiconductors and AI names.