OpenAI · Jul 9, 2026
GPT-5.6 is now the preferred model in Microsoft 365 Copilot
OpenAI announced that GPT-5.6 has become the preferred model in Microsoft 365 Copilot, applied in Word, Excel, PowerPoint, Chat, and Cowork.
What happened
GPT-5.6 is integrated into Microsoft 365 Copilot as the preferred model, covering applications such as Word, Excel, PowerPoint, Chat, and Cowork, aiming to deliver faster and higher-quality work results.
Technical significance
The deployment of GPT-5.6 in Microsoft 365 Copilot indicates that its reasoning capabilities, multitasking, and integration with office software have reached production readiness, likely involving more efficient context understanding and instruction following.
Industry impact
This integration strengthens the deep collaboration between OpenAI and Microsoft, potentially accelerating competition in the enterprise AI assistant market and prompting other office suite vendors to follow suit with similar integrations.
What to watch
We can observe user feedback on GPT-5.6 in Copilot, performance benchmark results, and whether it triggers response strategies from other cloud office platforms such as Google Workspace.
Decision value
By improving office efficiency and quality, GPT-5.6 is expected to increase enterprise user stickiness for Microsoft 365 and potentially drive related subscription revenue growth.