Upfirst - API users may see increased error rates for GPT-5.4 and GPT-5.5 – Incident details

All systems operational

API users may see increased error rates for GPT-5.4 and GPT-5.5

Resolved
Degraded performance
Started 2 months agoLasted about 1 hour

Affected

OpenAI → Chat Completions API

Degraded performance from 11:32 PM to 11:59 PM, Operational from 11:59 PM to 12:37 AM

Updates
  • Resolved
    UTC
    Resolved

    All impacted services have now fully recovered.

  • Update
    UTC
    Update

    We have applied the mitigation and are monitoring the recovery.

  • Monitoring
    UTC
    Monitoring

    We have applied the mitigation and are monitoring the recovery.

  • Identified
    UTC
    Identified

    We have identified that users are experiencing elevated errors for the impacted services.

    We are working on implementing a mitigation.