Microsoft Corp. is investing $10 billion in OpenAI, whose artificial intelligence tool ChatGPT has lit up the internet since its introduction in November, amassing more than a million users within days and touching off a fresh debate over the role of AI in the workplace.

The new support, building on $1 billion Microsoft poured into OpenAI in 2019 and another round in 2021, is intended to give Microsoft access to some of the most popular and advanced artificial intelligence systems. Microsoft is competing with Alphabet Inc., Amazon.com Inc. and Meta Platforms Inc. to dominate the fast-growing technology that generates text, images and other media in response to a short prompt.