Usage metrics API adds pull request review stages
By Steven Van ·
GitHub's Copilot usage metrics API now splits pull request review time into wait, back-and-forth, and merge stages with median and p90 figures.
The Copilot usage metrics API now reports how long pull requests sit in each stage of review. A new pull_request_review_times array on each repos-1-day row gives a median and 90th percentile for three windows: ready-for-review to first review, first review to final review, and final review to merge, plus a total_merged count for each authored_by/reviewed_by pair.
Only human reviews are timed: reviews from Copilot code review, other bots, and the author itself are excluded, so a pull request reviewed by both a person and Copilot code review is still counted. Durations are attributed to the day the pull request merged, and the data is not backfilled: pull requests that were ready for review before September 21, 2026 are left out of this section, though they still count toward the existing pull_requests.total_merged field. The breakdown is available in the enterprise and organization repos-1-day reports of the GitHub Copilot usage metrics API.
