OpenAI / ChatGPT
Degraded

ChatGPT outage on October 27, 2026: what happened and how long it lasted

On October 27, 2026, OpenAI / ChatGPT had degraded performance between 08:00 and 16:20 UTC, about 8.3 h in total. The vendor posted 2 incidents.

Live status

Timeline (UTC)

  1. OfficialOfficial incident posted: Elevated error rates for most hosted Code Reviews and Security Reviews on private GitHub repositories
  2. OfficialOfficially resolved: Elevated error rates for most hosted Code Reviews and Security Reviews on private GitHub repositories
  3. OfficialOfficial incident posted: 6.1 Sol Degraded Model Performance
  4. MeasuredModelBank probes detect degraded performance
  5. OfficialOfficially resolved: 6.1 Sol Degraded Model Performance
  6. MeasuredProbes back to normal (lasted 1.3 h)

Hourly measurements (UTC)

00:0012:0023:00

Also affected that day: 豆包 · Kimi

Was ChatGPT down on October 27, 2026?

On October 27, 2026, OpenAI / ChatGPT had degraded performance between 08:00 and 16:20 UTC, about 8.3 h in total. The vendor posted 2 incidents.

Is ChatGPT working now?

Live status: modelbank.ai/status/openai. We test it every 2 minutes.

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