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ChangesChatGPTAuthentication errors for some API users

ChatGPT: Major incident: Authentication errors for some API users

Major incidentmajor (vendor)Changed Detected status.openai.com (opens in new tab)
Summary

Summary pending. The diff below shows exactly what changed.

Incident page: the full timeline of updates

What changed

Struck in red is what ChatGPT removed; blue is what they added. Muted text is unchanged context.

AddedTitle#1
Before: not present
After: Authentication errors for some API users
AddedImpact#2
Before: not present
After: major
AddedStatus#3
Before: not present
After: resolved
AddedStart time#4
Before: not present
After: 2026-10-20 16:35 UTC
AddedResolved time#5
Before: not present
After: 2026-10-20 17:35 UTC
AddedUpdateinvestigating#6
Before: not present
After: Some API users near Illinois experienced authentication errors.
AddedUpdateresolved#7
Before: not present
After: On October 20, from 9:35 to 10:35 a.m. PDT, some API users near Illinois experienced authentication errors. We rolled back a configuration change, and service was restored.

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History of this incident

YesterdayWednesday, October 21Wed, Oct 21

1 rewrite

Tuesday, October 20

1 incident change

All ChatGPT changesChatGPT profileMarkdownJSON