GPT-5.6 is now the preferred model in Microsoft 365 Copilot
Today, OpenAI announced GPT‑5.6, which will become the new preferred model in Microsoft 365 Copilot—in Word, Excel, PowerPoint, Chat and Cowork. For Microsoft 365 customers, the update brings OpenAI's latest flagship model series into productivity tools people use every day, helping them create, analyze, and collaborate with more capable AI assistance across workstreams. GPT‑5.6 is OpenAI’s latest flagship model series, which delivers more useful work from every token, with stronger performance per dollar and on demand capability for the most complex tasks.