Outage in OpenAI ChatGPT
Elevated errors in Codex
Resolved Minor
April 23, 2026 - Started about 5 hours ago
- Lasted about 2 hours
Incident Report
Summary AI Generated
OpenAI ChatGPT experienced elevated errors affecting Codex gpt-5.5 usage for 2.1 hours, causing intermittent "not found" errors when users started or updated requests. Users reported that the service was not responding to messages during the incident. The issue was investigated and mitigated by the OpenAI team.
We’re investigating elevated errors affecting Codex gpt-5.5 usage. Some users may see intermittent “not found” errors when starting or updating requests. We’re working to mitigate the issue and will share another update soon.
Components affected
OpenAI ChatGPT Codex OpenAI ChatGPT ChatGPTLatest Updates ( sorted recent to last )
INVESTIGATING
about 5 hours ago - at 04/23/2026 06:23PM
We’re investigating elevated errors affecting Codex gpt-5.5 usage. Some users may see intermittent “not found” errors when starting or updating requests. We’re working to mitigate the issue and will share another update soon.
Latest OpenAI ChatGPT outages
Elevated errors for ChatGPT conversations in Europe - 3 days ago
Users unable to load ChatGPT, Codex and API Platform - 3 days ago
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