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ChatGPT Status · History · Incident #151937

RESOLVED

Authentication errors for some users

Major · Started Oct 21, 2026 · 10:36 PM

  • Duration

    1d 5h 1m

  • Severity

    Major

  • Detection lead

    —

  • User reports

    —

Summary

Authentication errors for some users

On October 20, from 9:35 to 10:35 a.m. PDT, some users near Illinois experienced authentication errors with the API, ChatGPT, and Codex. We rolled back a configuration change, and service was restored.

  • Started

    Oct 21, 2026 · 10:36 PM

  • Resolved

    Oct 20, 2026 · 5:35 PM

  • Duration

    1d 5h 1m

  • Severity

    Major

Event timeline

How this incident unfolded

  • ◐

    Investigating

    Oct 21 · 10:36 PM ChatGPT

    Some users near Illinois experienced authentication errors with the API, ChatGPT, and Codex.

  • ✓

    Resolved

    Oct 21 · 10:36 PM ChatGPT

    On October 20, from 9:35 to 10:35 a.m. PDT, some users near Illinois experienced authentication errors with the API, ChatGPT, and Codex. We rolled back a configuration change, and service was restored.

Pattern

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