Nvidia, the chip giant at the heart of the artificial intelligence (AI) boom, said business remained strong, despite fears of a bubble stirred by the launch of Chinese AI firm DeepSeek's launch on the scene last month.

Nvidia on Wednesday reported a surge in fourth-quarter profit and sales as demand for its specialized Blackwell chips that power artificial intelligence systems continued to grow.

DeepSeek shook the market, hitting Nvidia's shares hard and more recently leading to scrutiny of major OpenAI investor Microsoft's AI spending plans. Nvidia earnings on Wednesday after the close will be a key read on how the AI infrastructure leader sees the market for AI chips and data centers developing as the cost of large language models comes down.