China’s DeepSeek last week launched a free assistant it says uses less data at a fraction of the cost of US models. PHOTO: REUTERS US looking if DeepSeek got Nvidia AI chips through Singapore, other countries: Source NEW YORK – The US Commerce Department is looking into whether DeepSeek – the Chinese company whose AI model’s performance rocked the tech world – has been using US chips that are not allowed to be shipped to China, a person familiar with the matter said. China’s DeepSeek last week launched a free assistant it says uses less data at a fraction of…