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Today, we’re bringing OpenAI’s GPT‑5.4 Thinking to Microsoft 365 Copilot and Microsoft Copilot Studio—available in addition to the recent GPT-5.3 Instant update. With GPT‑5.4 Thinking, Copilot can think deeper on complex work by combining advances in reasoning, coding, and agentic workflows—helping it work through technical prompts and longer tasks with higher-quality outputs, and less back-and-forth. Work IQ brings relevant work context into Copilot so it can reason, personalize, and help you turn deeper thinking into context-aware drafts, slides, and spreadsheets.
We are committed to bringing you the latest cutting-edge AI innovation and model choice built for work and tailored to your business needs—with the security, compliance, and privacy that you expect from Microsoft.
Get started today
GPT-5.4 Thinking is now available in Copilot Studio early release cycle environments and begins rolling out today to Microsoft 365 Copilot users with priority access and Microsoft 365 Copilot Chat users with standard access. Learn more about standard versus priority access here.
In Copilot Chat, you can select GPT‑5.4 Think deeper from the model selector under More, and in Copilot Studio you can select GPT‑5.4 Reasoning.
Our team will continue to refine the experience based on your feedback. Learn more about Microsoft 365 Copilot and Microsoft Copilot Studio and start transforming work with Copilot today. For model details, learn more about GPT-5.4 Thinking here.
For the latest research insights on the future of work and generative AI, visit WorkLab.