DeepSeek, a Chinese artificial intelligence (AI) start-up, is sending shock waves through the U.S. tech sector by demonstrating its latest AI assistant, which achieves performance comparable to or even surpassing some of the world's best chatbots.

The messaging was rolled out on platforms such as X and META.O Facebook and Instagram, as well as Chinese services Toutiao and Weibo, Graphika said.

A frenzy over an artificial intelligence chatbot made by Chinese tech startup DeepSeek was upending stock markets Monday and fueling debates over the economic and geopolitical competition between the U.

Apple stock was up in premarket trading after the iPhone maker posted first-quarter earnings results that beat expectations.

Apple reported fiscal first-quarter earnings Thursday. Analysts are focused on iPhone momentum following a sluggish start to the year for Apple's stock.