The San Francisco start-up claims that its Chinese rival may have used data generated by OpenAI technologies to build new systems.

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The Silicon Valley giant was criticized for giving away its core A.I. technology two years ago for anyone to use. Now that bet is having an impact.

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What is DeepSeek, and why did it cause the markets and U.S. tech giants to quake? Cade Metz, a technology reporter for The New York Times who writes about artificial intelligence, explains.

The sudden popularity of the Chinese chatbot drove a huge plunge in shares of Nvidia. But other A.I. powerhouses rallied. Here’s why.

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How did a little-known Chinese start-up cause the markets and U.S. tech giants to quake? Here’s what to know.

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The company built a cheaper, competitive chatbot with fewer high-end computer chips than U.S. behemoths like Google and OpenAI, showing the limits of chip export control.