OpenAI incident

Some users may encounter issues with GPT-5.4-C model in Codex

Minor Resolved View vendor source →

OpenAI experienced a minor incident on April 21, 2026 affecting Codex Web and Codex API and 1 more component, lasting —. The incident has been resolved; the full update timeline is below.

Started
Apr 21, 2026, 04:33 AM UTC
Resolved
Apr 21, 2026, 04:33 AM UTC
Duration
—
Detected by Pingoru
Apr 21, 2026, 04:33 AM UTC

Affected components

Codex WebCodex APICLIVS Code extensionApp

Update timeline

  1. monitoring Apr 21, 2026, 02:34 AM UTC

    Status: Monitoring We have applied the mitigation and are monitoring the recovery. Affected components CLI (Degraded performance) App (Degraded performance) VS Code extension (Degraded performance) Codex API (Degraded performance) Codex Web (Degraded performance)

  2. resolved Apr 21, 2026, 04:33 AM UTC

    Status: Resolved All impacted services have now fully recovered. Affected components CLI (Operational) App (Operational) VS Code extension (Operational) Codex API (Operational) Codex Web (Operational)