Outage in OpenAI
Elevated latency and error rates for ChatGPT 5.5 Thinking
Resolved Minor
May 21, 2026 - Started 2 days ago
- Lasted about 1 hour
Incident Report
Summary AI Generated
OpenAI experienced elevated latency and error rates affecting ChatGPT 5.5 Thinking functionality on both web and ChatGPT platforms. The incident lasted 1.4 hours and was resolved by applying a mitigation, with the team continuing to monitor the recovery.
We have identified that users are experiencing elevated latency and error rates for ChatGPT 5.5 Thinking.
We are working on implementing a mitigation.
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Latest Updates ( sorted recent to last )
MONITORING
2 days ago - at 05/21/2026 10:57PM
We are continuing to monitor recovery.
MONITORING
2 days ago - at 05/21/2026 10:25PM
We have applied the mitigation and are monitoring the recovery.
IDENTIFIED
2 days ago - at 05/21/2026 10:05PM
We have identified that users are experiencing elevated latency and error rates for ChatGPT 5.5 Thinking.
We are working on implementing a mitigation.
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