Product Launch2026-07-10OpenAI Blog

GPT-5.6 Becomes Preferred Model in Microsoft 365 Copilot

OpenAI's GPT-5.6 has officially become the preferred model powering Microsoft 365 Copilot, marking a major upgrade for millions of users across the Microsoft ecosystem. This integration enhances AI capabilities in Word, Excel, PowerPoint, Microsoft Chat, and the Cowork collaboration tool, promising faster and higher-quality work output. With GPT-5.6 at its core, Copilot now offers more nuanced understanding of context, improved reasoning, and faster response times. In Word, users can expect more coherent document drafting and editing suggestions. Excel benefits from smarter data analysis and formula generation, while PowerPoint gains the ability to create more visually compelling and logically structured presentations. The Chat and Cowork features become more intuitive, enabling seamless team collaboration with AI that understands complex project requirements. Microsoft’s decision to adopt GPT-5.6 as the preferred model underscores the model's advanced intelligence and reliability. For businesses, this means increased productivity, reduced time spent on routine tasks, and a more natural interaction with AI assistants. The upgrade is rolling out gradually, with enterprise users likely to see the most immediate benefits. This partnership between OpenAI and Microsoft continues to push the boundaries of what AI can achieve in everyday productivity tools. As GPT-5.6 becomes deeply embedded in the Microsoft 365 suite, users can look forward to a more intelligent, responsive, and efficient digital workplace.

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