GitHub Copilot Code Review: 20% Efficiency Gain and New Depth Controls

GitHub Copilot Code Review: 20% Cost Reduction and New Configuration Controls

GitHub shipped a set of efficiency and configurability improvements to Copilot code review on June 25, 2026. The most impactful change is a tooling overhaul that cuts code review costs by roughly 20% without degrading review quality, a meaningful improvement given that Copilot code review began consuming GitHub Actions minutes as of June 1, 2026.

The 20% Efficiency Improvement

Copilot code review now uses the built-in file exploration tools from the Copilot CLI and SDK, specifically grep, rg, glob, and view, to navigate source code during a review. These replace a set of custom-built file exploration tools that were previously part of the review pipeline.

Using standardized tools allows the review system to navigate codebases more efficiently, focusing on the files and lines that matter most to a given change. GitHub reports approximately 20% cost reduction validated across both offline and online evaluations, with no measurable change in review quality. The result, in GitHub's framing, is "a more focused review where Copilot finds the code that matters, quickly."

For teams that adopted Copilot code review when it became a paid feature consuming GitHub Actions minutes, this improvement translates directly to lower ongoing usage costs with no configuration required on their end.

Medium Analysis Depth: New Attribution and Org-Level Defaults

For organizations participating in the Medium review effort level public preview, the June 25 update adds two governance-oriented improvements.

Attribution in PR overview comments: Copilot code review now labels Medium-depth analysis runs in the pull request overview comment. Teams configuring multiple review levels across repositories can confirm at a glance which analysis depth generated a given review, rather than checking configuration settings separately.

Organization-level default review level: Organizations can now set a default review level for repositories that do not have an explicit per-repo configuration. Individual repositories retain the ability to override this default, but the org-level setting reduces the administrative overhead of ensuring all new or unconfigured repositories have a consistent baseline.

Who Is Affected

The 20% efficiency improvement applies to all users of Copilot code review regardless of plan or configuration. The Medium attribution display and org-level default settings are available only to organizations currently opted into the Medium review effort level public preview.