Microsoft Copilot Studio - Custom Grader Library

We are announcing the ability to create custom graders once and reuse them across multiple evaluations using Custom Grader Library in Microsoft Copilot Studio. This feature will be available in public preview on September 15, 2026.

How does this affect me?

Users will be able to create custom graders once and reuse them across multiple evaluations. Custom graders will become reusable evaluation assets, making reuse explicit and helping reduce duplicate grading logic. This will improve consistency across evaluations and support more reliable comparison and regression analysis over time.

What action do I need to take?

This message is for awareness, and no action is required.