Export controls need to be tightened after revelations the Chinese company used Nvidia technology, the leaders of a congressional committee said.

US officials are probing whether Chinese AI startup DeepSeek bought advanced Nvidia Corp. semiconductors through third parties in Singapore, circumventing US restrictions on sales of chips used for artificial intelligence tasks,

WASHINGTON (Reuters) -Two U.S. Congress members are calling on President Donald Trump's administration to consider restricting the export of artificial intelligence chips made by Nvidia, alleging Chinese AI firm DeepSeek has relied on them.

Shares in AI-focused American tech giants, including Nvidia and Microsoft, fell on Monday after a China LLM shocked Silicon Valley.

DeepSeek stunned the tech world with the release of its R1 "reasoning" model, matching or exceeding OpenAI's reasoning model for a fraction of the cost.