OpenAI incident
Some users may encounter issues with GPT-5.4-C model in Codex
Minor Vendor's status page →
Resolved after 1 hour 58 minutes, affecting Codex Web and Codex API and 1 more, on April 21, 2026.
We have applied the mitigation and are monitoring the recovery.
Affected components
Codex WebCodex APICLIVS Code extensionCodex in ChatGPT Desktop
Update timeline
- monitoring Apr 21, 2026, 02:34 AM UTC
We have applied the mitigation and are monitoring the recovery.
- resolved Apr 21, 2026, 04:33 AM UTC
All impacted services have now fully recovered.
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