Copilot Code Review Action marked as completed, but review fails with Model "gpt-5.2" is not available

[t-masato-nagai]

🏷️ Discussion Type

Bug

💬 Feature/Topic Area

Copilot SDK

Body

Copilot Code Review Action has started failing since today.

The Action itself is marked as completed, but in reality the review does not run successfully and ends with this error:

Execution failed: Error: Model "gpt-5.2" is not available.

So although the workflow appears to complete, the actual code review is not performed.

Did this start happening to anyone else today?

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[Gecko51]

Seeing the same kind of reports pop up today. The error Model "gpt-5.2" is not available suggests the Code Review action is trying to hit a model endpoint that's either been deprecated or is temporarily down.

For context: GitHub deprecated GPT-5.1-Codex and its variants on April 3rd, and they've been rolling out GPT-5.3 and GPT-5.4 over the past couple months. It's possible the Code Review action's internal model reference got caught in this transition, where the action is requesting "gpt-5.2" but the backend has already moved on.

The tricky part is that this is server-side, so there's nothing you can configure on your end to fix it. The action workflow YAML doesn't expose a model picker for code review.

I'd keep an eye on githubstatus.com and the GitHub changelog (github.blog/changelog) for any updates. If it persists past today, it's probably worth filing a support ticket so the Copilot team can confirm whether it's a known issue on their end.

Are you on Copilot Business or Enterprise? Wondering if this is hitting all tiers or just specific ones.

[t-masato-nagai]

We use Copilot Business.

I found a pattern that seems to avoid the issue.

It only occurs when Auto Review is triggered by a user who does not have a Copilot license.
It does not occur when the review is triggered by a user who does have a Copilot license.