OpenAI — Degradation
ResolvedDegradation MediumApr 21, 2026, 02:35 AM · 3 days ago · Duration: 1h 59min
openaiView source
Incident Summary
External incident reported: Some users may encounter issues with GPT-5.4-C model in Codex. Affected:
Timeline
Started
Apr 21, 2026, 02:35 AM
3 days ago
Resolved
Apr 21, 2026, 04:35 AM
3 days ago
Duration
1h 59min
Track OpenAI reliability
This isn't OpenAI's first incident. They had 14 incidents in the last 180 days, averaging 483 minutes of impact.