The partnership is framed as a joint effort to bring advanced AI to more users and organizations, with a blog post reaffirming ongoing collaboration despite broader internal MAI growth.

A Q&A clarifies that Microsoft won’t abandon MAI, but the GPT-5.6 preference indicates continued reliance on OpenAI technology alongside expanding in-house MAI.]},{

OpenAI unveiled GPT-5.6 as the preferred model powering Microsoft 365 Copilot across Word, Excel, PowerPoint, and Cowork, signaling a strong continuation of the OpenAI–Microsoft collaboration.