Microsoft on Monday announced a new multiyear, multibillion-dollar investment with ChatGPT-maker OpenAI.

Microsoft declined to provide a specific dollar amount, but Semafor reported earlier this month that Microsoft was in talks to invest as much as $10 billion.

The deal marks the third phase of the partnership between the two companies, following Microsoft’s previous investments in 2019 and 2021. Microsoft said the renewed partnership will accelerate breakthroughs in AI and help both companies commercialize advanced technologies in the future.

“We formed our partnership with OpenAI around a shared ambition to responsibly advance cutting-edge AI research and democratize AI as a new technology platform,” Microsoft CEO Satya Nadella said in a blog post.

OpenAI works closely with Microsoft’s cloud service Azure. In July 2019, Microsoft backed OpenAI with $1 billion, and the investment made Microsoft the “exclusive” provider of cloud computing services to OpenAI. Microsoft said Monday that Azure will continue to serve as OpenAI’s exclusive provider.

Microsoft’s investment will also help the two companies engage in supercomputing at scale and create new AI-powered experiences, the release said.

OpenAI is ranked by AI researchers as one of the top three AI labs worldwide, and the company has developed game-playing AI software that can beat humans at video games such as Dota 2. However, it’s arguably received more attention for its AI text generator GPT-3 and its quirky AI image generator Dall-E.

ChatGPT automatically generates text based on written prompts in a fashion that’s much more advanced and creative than the chatbots of Silicon Valley’s past. The software debuted in late November and quickly turned into a viral sensation as tech executives and venture capitalists gushed about it on Twitter, even comparing it to Apple’s debut of the iPhone in 2007. 

The technology also caught the attention of Google executives, who said in a recent all-hands meeting that while Google has similar AI capabilities, its reputation could suffer if it moves too fast on AI chat technology.

OpenAI’s founders included Sam Altman, Tesla and SpaceX CEO Elon Musk, Greg Brockman, Ilya Sutskever, Wojciech Zaremba and John Schulman. The group pledged to invest over $1 billion into the venture when it launched. Musk resigned from the board in February 2018 but remained a donor.

— CNBC’s Jonathan Vanian and Jennifer Elias contributed to this report.