DeepSeek has Silicon Valley in awe and stocks in a frenzy.Tech stocks sank in a broad selloff Monday after the Chinese artificial-intelligence upstart said it had trained high-performing AI models cheaply,

DeepSeek has triggered a dramatic rethink on artificial intelligence spending around the world, except perhaps in China. The startup's impressive low-cost model showcases the country's innovation prowess.

DeepSeek, a Chinese AI-chatbot app which launched last week, has sparked chaos in the US markets and raised questions about the future of America's AI dominance. The BBC takes a look at how the app works. DeepSeek looks and feels like any other chatbot, though it leans towards being overly chatty.