OpenAI incident
API users may see increased error rates for GPT-5.4 and GPT-5.5
OpenAI experienced a minor incident on May 20, 2026 affecting Responses and Chat Completions, lasting —. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- identified May 19, 2026, 11:32 PM UTC
Status: Identified We have identified that users are experiencing elevated errors for the impacted services. We are working on implementing a mitigation. Affected components Chat Completions (Degraded performance) Responses (Degraded performance)
- monitoring May 19, 2026, 11:38 PM UTC
Status: Monitoring We have applied the mitigation and are monitoring the recovery. Affected components Responses (Degraded performance) Chat Completions (Degraded performance)
- monitoring May 19, 2026, 11:59 PM UTC
Status: Monitoring We have applied the mitigation and are monitoring the recovery. Affected components Chat Completions (Operational) Responses (Operational)
- resolved May 20, 2026, 12:37 AM UTC
Status: Resolved All impacted services have now fully recovered. Affected components Chat Completions (Operational)