M365 Copilot and Anthropic Opus 4.1

There was an important announcement this week.  M365 Copilot will now allow users to leverage Anthropic Opus 4.1 with the Researcher agent.  This was exciting to see because up till now, M365 Copilot could only work with ChatGPT model.  Frankly, I had been telling customers that model selection was not feature of M365 Copilot, however now it is, and it is super exciting to see.

Reference: https://www.microsoft.com/en-us/microsoft-365/blog/2025/09/24/expanding-model-choice-in-microsoft-365-copilot/