Chinese AI bot DeepSeek has disrupted the stock market, with US President Donald Trump calling its rise “a wake-up call” for the US tech industry.
DeepSeek – which claims its model was made at a fraction of the cost of its rivals – has become the most downloaded free app in the US just a week after it was launched.
The BBC’s AI correspondent, Marc Cieslak discusses why the large language model has caused shockwaves.

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