Disruption with OpenAI Models

What to do

• Check whether you use GitHub Copilot. Check your stack

  Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.

• Confirm your retries, queues and scheduled jobs caught up after the 1h 41m it lasted.

  Anything that failed between 2026-05-28 19:01 UTC and 2026-05-28 20:41 UTC may need a replay.

• Subscribe to GitHub's feed to hear about the next one first. RSS feed

  https://down.guide/feed?provider=github works in Slack (/feed subscribe), Discord feed bots and any RSS reader.

Updates from GitHub 5

1. investigatingMay 28, 2026, 7:01 PM UTC

   We are investigating reports of impacted performance for some GitHub services.

   provider

2. investigatingMay 28, 2026, 7:20 PM UTC

   Copilot is experiencing degraded performance. We are continuing to investigate.

   provider

3. investigatingMay 28, 2026, 7:40 PM UTC

   We are investigating errors with Copilot requests using OpenAI models

   provider

4. investigatingMay 28, 2026, 8:06 PM UTC

   Open AI models are currently unavailable. We are shifting requests to other models to reduce impact.

   provider

5. resolvedMay 28, 2026, 8:41 PM UTC

   On May 28th, 2026, between approximately 18:27 and 20:41 UTC, the GitHub Copilot service was degraded due to an issue with the Responses API of an upstream provider affecting the GPT-5.2, GPT-5.3-Codex, GPT-5.4, and GPT-5.5 models. Requests routed to these models via the Responses API returned elevated error rates, which also affected Copilot coding agent and Copilot code review. No other models were impacted. We mitigated the incident by shifting traffic away from the affected models while the upstream provider deployed a fix. GitHub is working to improve automated failover for the affected models and strengthen monitoring to prevent similar incidents in the future.

   provider

Corrections

None so far.

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