US President Donald Trump has called Chinese AI start-up DeepSeek's strong showing a "wake-up call" and "positive" for America's tech sector, and also warned that he would slap tariffs on foreign-made semiconductor chips,

The U.S. tried to slow China’s advances, but the startup showed how hard that is.

DeepSeek, a Chinese artificial-intelligence startup that’s just over a year old, has stirred awe and consternation in Silicon Valley after demonstrating AI models that offer comparable performance to the world’s best chatbots at seemingly a fraction of their development cost.