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The Guardian - UK
The Guardian - UK
Business
Robert Booth UK technology editor

What is DeepSeek and why did US tech stocks fall?

DeepSeek logo on a phone on a keyboard
Why haven’t we heard about DeepSeek before? Photograph: Dado Ruvić/Reuters

Investors have been fleeing US artificial intelligence stocks amid surprise at a new, cheaper but still effective alternative Chinese technology.

What is DeepSeek?

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