Microsoft just quietly dropped GPT-5.1 into Copilot Studio, available now as an experimental model.
If you’re building AI agents on Power Platform, you can now test the latest OpenAI capabilities before they go GA. That means things like adaptive reasoning modes, faster responses, and even tunable thinking time (including “none” if you want it instant).
It’s still early access (US only, for now), but if you’re working in low-code environments or extending Copilot with APIs and custom connectors this is worth a closer look.
Full article here: https://visualstudiomagazine.com/articles/2025/11/17/gpt-5-1-now-available-in-microsoft-copilot-studio-as-experimental-model.aspx