# Authentication errors for some users

- Provider: [OpenAI](https://down.guide/openai)
- Level: confirmed
- Impact: Partial outage
- lasted 0m
- started 2026-10-21 22:36 UTC
- id: DWN-07d2627511
- Official page: https://status.openai.com/incidents/01M5G9QQ9V4CYDWFRYF9BWZ5GG

## Updates from OpenAI
### 2026-10-20 16:35 UTC: investigating
Some users near Illinois experienced authentication errors with the API, ChatGPT, and Codex.

### 2026-10-20 17:35 UTC: resolved
On October 20, from 9:35 to 10:35 a.m. PDT, some users near Illinois experienced authentication errors with the API, ChatGPT, and Codex. We rolled back a configuration change, and service was restored.

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