OpenAI: GPT 5.6 is the Future AI Engine for Microsoft Copilot
OpenAI clarifies that GPT 5.6 will be the primary model for Microsoft Copilot 365, contradicting rumours of reduced integration in favour of Microsoft's in-house AI models.
What happened?
Following reports that Microsoft intended to replace OpenAI's software with internal proprietary MAI models for applications such as Word and Excel, OpenAI has now disclosed that GPT 5.6 will be the preferred model for Microsoft's Copilot 365. This was announced in conjunction with the launch of GPT 5.6 on Thursday, 9 July 2026. A blog post from OpenAI confirms that GPT 5.6 will support Microsoft users across productivity apps including Word, Excel, PowerPoint, and Cowork.
Key facts
| Modellrelease | GPT 5.6 |
|---|---|
| Lanseringsdatum | 9 juli 2026 |
| Berörda appar | Word, Excel, PowerPoint, Cowork |
”Our partnership with Microsoft has always been about bringing the benefits of advanced AI to more individuals and organizations, and we’re excited to continue building on that shared commitment.”
Why it matters
Rumours of a potential rift between OpenAI and Microsoft have been circulating. Microsoft's investment in its own AI models (MAI) was interpreted as a sign of diminishing reliance on OpenAI. The announcement regarding GPT 5.6 aims to reassure the market and underscore the continued partnership between the two tech giants, as well as its significance for AI development within productivity software.
Who is affected?
This primarily affects users of Microsoft 365 Copilot, including enterprises and individuals using apps such as Word and Excel. AI developers are also closely monitoring the evolution of the partnership. Microsoft and OpenAI are the main actors directly affected by this strategic decision.
What else you should know
The exact definition of what constitutes a 'preferred model' has not been fully clarified, leaving some room for interpretation regarding future developments in the partnership.
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