Codex cloud settings (Code review toggle per repository)
Inline comment cap
Inline comment cap
Not verifiedUnverified
Not verifiedUnverified
Self-hosted option
Self-hosted option
No
No
CI hosts
CI hosts
GitHub Actions (agentic review runners)
Not a separate CI product
Autofix
Autofix
Yes
Not verifiedUnverified
Merge gate
Merge gate
No
Not verifiedUnverified
Free for qualifying OSS
Free for qualifying OSS
Not verifiedUnverified
Not verifiedUnverified
Catalog checked September 26, 2026. Dollar figures and merge-gate behaviour should be re-read on the vendor pricing page before a contract.
Bundled with another product
GitHub Copilot code review
The default if the team already pays for Copilot: no second GitHub App, no second vendor review.
Best for
Teams standardised on GitHub Copilot
Orgs that want review coverage on every PR without a seat for every author
Watch out
Shares credit pools with the rest of Copilot. Unlicensed-author coverage is policy-gated and bills AI Credits plus Actions minutes. Azure DevOps support is public preview. Copilot reviews can now approve PRs (2026-09-01) but still cannot block a merge with request-changes. The org default effort changes from Lite to Balanced on 2026-09-28 (higher credit use per review). From Oct 1, Business/Enterprise customers paying by credit card or PayPal move to upfront seat billing. Buying a dedicated reviewer only pays if Copilot's native review is too shallow for the repo.
Bundled with another product
OpenAI Codex code review
The default reviewer for teams already paying for ChatGPT with Codex: no second vendor, and usage comes out of the existing Codex allowance.
Best for
Teams already on ChatGPT Plus, Pro, Business or Enterprise
GitHub repos already connected to Codex cloud
Watch out
Shares Codex limits with the rest of your Codex work, so heavy review can starve agent tasks. API-key Codex has no cloud features, including GitHub review. GitHub only.
GitHub Copilot code review vs OpenAI Codex code review questions
Answered from the verified figures on this page rather than general guidance.
Where do GitHub Copilot code review and OpenAI Codex code review run?
GitHub Copilot code review runs as built into github.com pull requests on GitHub, Azure DevOps (public preview). OpenAI Codex code review runs as @codex review on github pull requests on GitHub.
How do GitHub Copilot code review and OpenAI Codex code review bill?
GitHub Copilot code review: Bundled with Copilot plans that include code review (Pro lists access to cloud agent and code review, with $15 monthly credits on Pro). Licensed-user review draws from the Copilot allowance. Orgs can enable review on PRs from people without a Copilot seat; that usage bills as GitHub AI Credits. From 2026-06-01, code-review workflows also consume GitHub Actions minutes. OpenAI Codex code review: Bundled with ChatGPT plans from Plus ($20/mo) upward — Plus lists cloud-based integrations such as automatic code review, and Pro and higher include everything in Plus. The Free and Go plans do not list it. Review usage draws on the plan's Codex usage limits or credits. Signing in to Codex with an API key does not unlock it.
What is the hourly or throughput limit for GitHub Copilot code review vs OpenAI Codex code review?
GitHub Copilot code review: No published hourly PR cap. GitHub docs estimate Lite reviews at $0.05–$1 of AI credits and Balanced at $0.25–$5, plus GitHub Actions minutes for agentic context gathering (self-hosted runners do not consume Actions minutes). Business/Enterprise reviews stop when the user or cost-center budget is exhausted. Copilot also has unpublished temporary rate limits during high demand. Copilot Free has no pull-request reviews on GitHub — only 'Review selection' in VS Code. OpenAI Codex code review: No separate hourly PR cap. Reviews run through Codex cloud and count against the same 5-hour and weekly Codex limits (or credits) as other Codex work; code-review usage applies only when Codex runs reviews through GitHub.
Can GitHub Copilot code review or OpenAI Codex code review apply fixes?
GitHub Copilot code review: Yes. OpenAI Codex code review: Not verified. Autofix is still a suggestion until your CI and humans accept it.
Can GitHub Copilot code review or OpenAI Codex code review block a merge?
GitHub Copilot code review: No. OpenAI Codex code review: Not verified. A missing verification means we did not treat marketing copy as a merge-gate claim.
Should I choose GitHub Copilot code review or OpenAI Codex code review?
Choose GitHub Copilot code review if this matches: Teams standardised on GitHub Copilot. Orgs that want review coverage on every PR without a seat for every author. Choose OpenAI Codex code review if this matches: Teams already on ChatGPT Plus, Pro, Business or Enterprise. GitHub repos already connected to Codex cloud. GitHub Copilot code review watch-out: Shares credit pools with the rest of Copilot. Unlicensed-author coverage is policy-gated and bills AI Credits plus Actions minutes. Azure DevOps support is public preview. Copilot reviews can now approve PRs (2026-09-01) but still cannot block a merge with request-changes. The org default effort changes from Lite to Balanced on 2026-09-28 (higher credit use per review). From Oct 1, Business/Enterprise customers paying by credit card or PayPal move to upfront seat billing. Buying a dedicated reviewer only pays if Copilot's native review is too shallow for the repo. OpenAI Codex code review watch-out: Shares Codex limits with the rest of your Codex work, so heavy review can starve agent tasks. API-key Codex has no cloud features, including GitHub review. GitHub only.
