GPT 5.6 to Power Microsoft 365 Copilot, OpenAI Confirms

GPT 5.6 Model Announcement

According to НВ — Техно: On July 10, 2026, OpenAI announced that its latest model, GPT 5.6, will serve as the foundation for Microsoft 365 Copilot, supporting Word, Excel, PowerPoint, and Cowork. This development comes amid speculation about cooling ties between OpenAI and Microsoft, as well as reports that Microsoft has been shifting some tasks to its own in-house MAI models.

OpenAI launched GPT 5.6 on Thursday, July 9, 2026. The model is expected to enhance the functionality of key Microsoft applications used by millions of professionals worldwide. Prior to this announcement, Bloomberg reported that Microsoft had begun transferring some workloads from OpenAI’s software to its proprietary MAI models, which were already powering Word and Excel before the GPT 5.6 rollout.

“Our partnership with Microsoft has always been about bringing the benefits of cutting-edge AI to more people and organizations, and we are excited to continue advancing this shared commitment.”

- OpenAI Spokesperson

With GPT 5.6 integrated into Microsoft 365, users can expect improvements in both functionality and efficiency across these essential productivity tools.

Importance of the Collaboration

The integration of GPT 5.6 into Microsoft 365 Copilot highlights the enduring strategic partnership between OpenAI and Microsoft, even amid rumors of shifting dynamics. It also signals continued investment in AI technologies that have the potential to transform how users interact with popular office software. Going forward, successful deployment of the new model could further enhance the performance and market competitiveness of Microsoft’s product suite.

The announcement of GPT 5.6's integration into Microsoft 365 Copilot comes at a time when Microsoft is reevaluating its reliance on OpenAI's technology. This shift raises questions about the future of their collaboration, especially in light of reports regarding Microsoft's transition to its own AI solutions for Excel and Outlook. Understanding the implications of these changes is crucial for users who depend on these productivity tools.