OpenAI has introduced GPT-5.6 as the preferred model behind Microsoft 365 Copilot, signaling continued alignment between the two companies as both expand their AI strategies.
In its announcement, OpenAI said the model will support Microsoft's productivity ecosystem, including Word, Excel, PowerPoint and Cowork. The move highlights how advanced language models are becoming more deeply embedded in everyday workplace tools.
The company also described its collaboration with Microsoft as a shared effort to bring AI capabilities to more people and organizations. While Microsoft has been increasing its use of in-house MAI models in some products, the new designation suggests OpenAI remains a central part of Copilot's AI foundation.
Although the exact meaning of "preferred model" was not fully detailed, the message is clear: OpenAI's latest model will continue to play a leading role in Microsoft's productivity suite. As AI assistants evolve, such partnerships may shape a more seamless and intelligent digital work environment in the years ahead.
