Region-by-region timeline
When each monitored region started failing and when it recovered, per RealUptime's own probes. A region not listed here never failed during this incident.
US-East10 min
Failing from Aug 28, 2026, 1:55 AM UTC, recovered Aug 28, 2026, 2:05 AM UTC
US-West10 min
Failing from Aug 28, 2026, 1:56 AM UTC, recovered Aug 28, 2026, 2:06 AM UTC
Europe10 min
Failing from Aug 28, 2026, 1:56 AM UTC, recovered Aug 28, 2026, 2:06 AM UTC
How this was measured
This record comes only from RealUptime's own scheduled probes against OpenAI's public, unauthenticated endpoints, run from 4 named regions. It is never built from user reports or from OpenAI's own status page, and it does not change once this incident closes: this page is the permanent record, not a live view.