# Usage metrics API adds pull request review stages

By Steven Van · 2026-09-25

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](<https://creatorstoolbox.com/tools/github>) [Copilot usage metrics API](<https://docs.github.com/rest/copilot/copilot-usage-metrics>).

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[Read the original announcement →](<https://docs.github.com/rest/copilot/copilot-usage-metrics>)

[Read Usage metrics API adds pull request review stages on Creators Toolbox](<https://creatorstoolbox.com/blog/github-usage-metrics-api-adds-pull-request-review-stages>)

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Canonical source: https://creatorstoolbox.com/blog/github-usage-metrics-api-adds-pull-request-review-stages