{
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    "slug": "github-disruption-with-openai-models-2026-05-28",
    "title": "Disruption with OpenAI Models",
    "summary": "Disruption with OpenAI Models",
    "status": "resolved",
    "severity": "critical",
    "startedAt": "2026-05-28T19:01:00.362+00:00",
    "updatedAt": "2026-06-01T17:43:06.969+00:00",
    "resolvedAt": "2026-05-28T20:41:58.586+00:00",
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        "status": "investigating",
        "body": "We are investigating reports of impacted performance for some GitHub services.",
        "createdAt": "2026-05-28T19:01:00.444+00:00"
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        "status": "investigating",
        "body": "Copilot is experiencing degraded performance. We are continuing to investigate.",
        "createdAt": "2026-05-28T19:20:58.651+00:00"
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      {
        "id": "update_statuspage_github_rhqcgg8lg6mm_kypg9w3l7lbd",
        "status": "investigating",
        "body": "We are investigating errors with Copilot requests using OpenAI models",
        "createdAt": "2026-05-28T19:40:54.881+00:00"
      },
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        "body": "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. <br /><br />We mitigated the incident by shifting traffic away from the affected models while the upstream provider deployed a fix. <br /><br />GitHub is working to improve automated failover for the affected models and strengthen monitoring to prevent similar incidents in the future.",
        "createdAt": "2026-05-28T20:41:58.586+00:00"
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