The effort is said to focus on the tech giant’s Microsoft 365 Copilot product. It’s an artificial intelligence assistant that ships with the eponymous productivity suite. Microsoft is reportedly working to integrate custom and open-source artificial intelligence models into the assistant, which is currently powered by technology from OpenAI.

When Microsoft announced 365 Copilot in March 2023, a major selling point was that it used OpenAI's GPT-4 model. Microsoft is also seeking to reduce 365 Copilot's reliance on OpenAI due to concerns about cost and speed for enterprise users, according to the sources, who requested anonymity to discuss private matters.

Microsoft is reshaping its AI strategy for 365 Copilot by integrating in-house and third-party models, easing its reliance on OpenAI due to cost and speed concerns for enterprise users, according to sources.