ChatGPT Status · History · Incident #4545

RESOLVED

Elevated error rates for GPT 5.5 in Codex

Minor · Started Jun 11, 2026 · 8:59 PM

Duration

1h 28m
Severity

Minor
Detection lead

—
User reports

Peak 1/hr

Summary

Elevated error rates for GPT 5.5 in Codex

All impacted services have now fully recovered.

Started

Jun 11, 2026 · 8:59 PM
Resolved

Jun 11, 2026 · 10:28 PM
Duration

1h 28m
Severity

Minor

Event timeline

How this incident unfolded

◆

Identified
Jun 11 · 8:59 PM ChatGPT

We have identified that users are experiencing elevated errors when using GPT 5.5 in Codex. We are working on implementing a mitigation.
◉

Monitoring
Jun 11 · 9:33 PM ChatGPT

We have applied the mitigation and are monitoring the recovery.
✓

Resolved
Jun 11 · 10:28 PM ChatGPT

All impacted services have now fully recovered.

User reports · incident window

Report volume over time

Hourly report count. Red bars mark the incident window.

Peak: 1 reports/hr

← Before incident After →

Pattern

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