US investigates if China’s DeepSeek used banned chips.

The U.S. Department of Commerce is investigating whether the Chinese company DeepSeek used American chips that are banned for export to China. DeepSeek launched an assistant that uses less data and costs less than American models. It quickly became the most downloaded app on Apple’s App Store, raising concerns about the U.S. advantage in artificial intelligence and leading to a drop in the value of American tech stocks on the stock market.