OpenAI says GPT 5.6 is the ‘preferred model’ for Microsoft Copilot 365 amid breakup chatter

Editor's take

OpenAI has designated GPT-4o as the primary model for Microsoft Copilot, signaling continued deep integration despite speculation about a partnership shift. This decision underscores the substantial investment Microsoft has made in OpenAI's technology, particularly its multimodal capabilities, which are now being infused across the Copilot ecosystem, from Windows to Microsoft 365 applications.

The choice of GPT-4o, with its enhanced speed and reasoning, is critical for delivering a more responsive and capable Copilot experience, directly impacting millions of Microsoft users. It also highlights the ongoing symbiotic relationship between the two companies, where OpenAI's advancements directly translate into competitive advantages for Microsoft's enterprise and consumer products. This move aims to maintain Copilot's edge against rivals like Google's Gemini, which is also rapidly evolving.

Future developments will hinge on how effectively GPT-4o's multimodal features are deployed and how quickly OpenAI can iterate on its models, potentially with new architectures or training efficiencies. The continued reliance on a single, state-of-the-art model for Copilot also raises questions about diversification and the long-term strategic independence of both entities, especially as Microsoft explores its own AI hardware initiatives.