Entrepreneur Marc Andreessen, known for co-writing Mosaic, one of the world’s first web browsers, wrote Sunday on X that “DeepSeek R1 is AI’s Sputnik moment,” likening it to the space race between the U.S. and the Soviet Union and the event that forced the U.S. to realize that its technological abilities were not unassailable.

U.S. tech stocks, including Nvidia, Oracle and Broadcom, plummeted Monday after Chinese startup DeepSeek said it created an AI system that can compete against chatbots such as OpenAI's ChatGPT at much lower costs.

Chinese tech startup DeepSeek said it was hit by a cyber attack on Monday that disrupted users’ ability to register on the site