What’s new for Copilot – December 2025
December was a quieter month than usual for Copilot, but that does not mean there is a lack of updates. In fact, there are dozens of improvements to explore. For this post, I am highlighting three key features that stand out for their impact on usability and productivity.
The first is the new GPT-5 Mode Selector, which introduces Auto, Quick response, and Think deeper options. Copilot now defaults to GPT-5, and users can choose the mode that best fits their workflow. Your selection persists across chats, making it easier to control the depth and speed of responses.
Another improvement is the ability to RSVP to meetings directly in Copilot chat. You can now accept, decline, mark tentative, follow, or remove canceled meetings without leaving the chat experience. Finally, Copilot is upgrading its image generation capabilities by replacing GPT-4o with OpenAI’s GPT-Image-1.5 model, it delivers better quality, speed, and accuracy for image generation without altering compliance or admin settings.


HANDS ON tek
M365 Admin











