OpenAI names GPT 5.6 as preferred model for Microsoft 365 Copilot amid partnership speculation
OpenAI designates GPT 5.6 as the preferred model for Microsoft 365 Copilot, reaffirming the partnership amid reports of Microsoft developing its own internal AI solutions.
1. OpenAI Announces New Model
On July 9, 2026, OpenAI launched its latest family of models, headlined by GPT 5.6. During the announcement, the company designated GPT 5.6 as the "preferred model" for Microsoft 365 Copilot. This software is slated to support Microsoftâs suite of productivity applications, including Word, Excel, PowerPoint, and Cowork.
2. Addressing Partnership Speculation
The announcement follows recent reports suggesting that Microsoft has been increasingly incorporating its own in-house AI models, known as MAI, into its software to reduce costs. These reports fueled speculation regarding the stability of the partnership between Microsoft and OpenAI. By naming GPT 5.6 as the preferred model, OpenAI stated its intention to continue its collaborative commitment to bringing advanced AI to individuals and organizations.
3. Clarifying the Relationship
While OpenAIâs designation of a "preferred model" confirms that its technology will remain a core component of Microsoftâs ecosystem, it does not necessarily contradict reports of Microsoftâs cost-cutting measures. The disclosure does not indicate that Microsoft is ending its use of OpenAI software, but rather clarifies that the two companies continue to maintain a functional partnership despite Microsoftâs concurrent efforts to utilize its own internal AI solutions.