A White House official accused China’s Moonshot of improperly using US AI models and Nvidia Corp. chips to create the Kimi K3 system that stunned the tech industry last week with its advanced capabilities.The company “acquired GB300-equipped servers and has accessed GB300s in Thailand, likely to train its AI models,” White House Office of Science and Technology Policy Director Michael Kratsios said in a social media post Wednesday, making the case that Moonshot violated US export control rules a...