06:20 AM EST, 01/29/2025 (MT Newswires) -- Microsoft ( MSFT )-backed (MSFT) OpenAI says it has evidence that China's DeepSeek used the San Francisco-based company's AI models to train its offering in a possible infringement of intellectual property, the Financial Times reported Wednesday, citing the ChatGPT maker.

OpenAI says it has evidence that DeepSeek improved its performance using OpenAI large language models, the report said.

Microsoft ( MSFT ) and OpenAI investigated into whether unauthorized OpenAI technology was accessed by a group linked to DeepSeek last year, the report cited a person with knowledge as saying.

President Donald Trump's technology envoy David Sacks told Fox News on Tuesday "there's substantial evidence" DeepSeek "distilled" knowledge from OpenAI models, multiple news outlets reported.

OpenAI and Microsoft ( MSFT ) did not immediately reply to MT Newswires' request for comment.

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