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

OpenAI announced GPT 5.6 as the preferred AI model for Microsoft 365 Copilot, reaffirming their partnership despite reports of Microsoft using its own models to reduce costs. GPT 5.6 will support apps like Word, Excel, PowerPoint, and Cowork.