ChatGPT

✓

Codex down due to 401 backend key error

Updated 25 Sep 2026, 23:54 UTC

Resolved 22:58Started 2Timeline events

Confirmed by the official source.

Executive summary

Summary
The provider confirmed a Codex disruption affecting Codex Web, CLI, the VS Code extension, and the Codex API, each listed as a full outage. API-key login was reported as a way to unblock access, while mitigation remained in progress.

What users experienced

User impact
Codex Web, CLI, the VS Code extension, and the Codex API were reported as fully unavailable. API-key login could unblock access at one point during the incident.

◷

Started

22:5825 Sep 2026

▧

Timeline events

Timeline of the incident

25 Sep 2026, 23:01 UTC
Detection
Confirmed by an official service source.
25 Sep 2026, 23:54 UTC
Resolution
The service is no longer reporting this incident as active.

What we know

✓The provider confirmed the Codex disruption and listed Codex Web, CLI, the VS Code extension, and the Codex API as full outages.
✓The provider reported that login via API key could unblock access.
✓The provider later stated that the root cause had been identified and that it was moving toward mitigation.