OpenAI Responses API experienced elevated latency on the US endpoint
OpenAI's status page documented elevated latency affecting some Responses API requests on the US endpoint from August 31 into September 1 before mitigations restored service.
- First observed
- Sep 1, 2026, 12:27:56 AM
- Disclosed
- Sep 1, 2026, 12:27:56 AM
- Status
- Resolved
- Confidence
- 99%
- Organization
- OpenAI
- Last reviewed
- Sep 4, 2026
Observed
Facts supported by sources
- OpenAI reported elevated latency affecting some Responses API requests on the US endpoint.
- The incident was first posted at 22:27 UTC on August 31 and marked fully recovered at 19:05 UTC on September 1 after mitigations and monitoring.
Assessment
Interpretation, not observation
- OpenAI did not publish a root cause on the status page reviewed for this run.
Impact
Impact
Slower Responses API calls for affected US-endpoint customers over a multi-hour period.
Response
Response
OpenAI identified the issue, applied multiple mitigations, monitored recovery and then reported full service restoration.