
An artificial intelligence chatbot from Chinese startup DeepSeek is upending assumptions that U.S. tech giants hold a firm grip on AI development, leading to a stock market shakeup and renewed concerns over national security.
DeepSeek's bot assistant became the No. 1 downloaded free app on Apple’s iPhone store on Monday, outpacing OpenAI's ChatGPT. AI-related companies like Nvidia, Microsoft and Oracle saw sharp declines as DeepSeek's rally erased nearly $1.2 trillion in market capitalization value from global stock names, according to Bloomberg data.