Outage in OpenAI ChatGPT
Issues with Codex
Resolved Major
September 25, 2026 - Started about 12 hours ago
- Lasted about 1 hour
Incident Report
Summary AI Generated
OpenAI's Codex service experienced a major outage lasting 56 minutes, causing widespread failures across ChatGPT and Codex, with users reporting persistent "Error in message stream" errors, messaging failures across all devices, and API authentication errors (401 Unauthorized). Enterprise users were notably impacted while free-tier access remained functional, and a temporary workaround of logging in via API key was identified early in the incident. The root cause was identified and a mitigation was applied, with the service moving into a monitoring phase for recovery.
We have identified that users are experiencing a codex outage.
We have identified the internal issue and are heading towards a mitigation.
Components affected
OpenAI ChatGPT ChatGPT OpenAI ChatGPT CodexLatest Updates ( sorted recent to last )
MONITORING
about 11 hours ago - at 09/25/2026 11:45PM
We have applied the mitigation and are monitoring the recovery.
IDENTIFIED
about 11 hours ago - at 09/25/2026 11:34PM
We have identified root cause and are moving towards mitigation.
IDENTIFIED
about 12 hours ago - at 09/25/2026 11:19PM
Login via API key will unblock access at this time.
IDENTIFIED
about 12 hours ago - at 09/25/2026 11:03PM
We have identified that users are experiencing elevated errors for the impacted services.
We are working on implementing a mitigation.
IDENTIFIED
about 12 hours ago - at 09/25/2026 10:58PM
We have identified that users are experiencing a codex outage.
We have identified the internal issue and are heading towards a mitigation.
source IsDown
Service outage and API issues
Reports started 2 minutes before official outage was reported
Users report API errors, repeated '401 Unauthorized' messages due to incorrect API keys, and widespread interruptions across message streams.
Latest OpenAI ChatGPT outages
Increased error rate for Plus and Pro users. - 4 days ago
Elevated errors for ChatGPT users in Europe - 13 days ago
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