Downstream third-party provider outage (OpenAI LLMs)

Update timeline

1. identified Oct 22, 2025, 05:45 PM UTC

   A service degradation and partial outage began at approximately 16:44 UTC.

2. identified Oct 22, 2025, 06:07 PM UTC

   We're seeing elevated error rates (500 Internal Server Error) with OpenAI models in the Voice Agent API. Our team is actively investigating and communicating with OpenAI to find a path to resolution, and a path to mitigation in the short term. Our metrics show degraded service for 4o-mini, 4.1-mini, 4.1 nano, 4.1, and possibly other OpenAI models. We are continuing to monitor, investigate, and work with OpenAI to resolve. As a workaround, we recommend switching to a different model or provider.

3. identified Oct 23, 2025, 06:20 PM UTC

   We are continuing to see elevated error rates with OpenAI models in the Voice Agent API workflow. We have reached out and communicated with OpenAI to help resolve.

4. identified Oct 24, 2025, 05:47 PM UTC

   We are still continuing to see increased errors using the OpenAI models in the Voice Agent API workflow. We have reached out and communicated with OpenAI to help resolve.

5. identified Oct 27, 2025, 11:31 PM UTC

   We are still continuing to see increased errors using the OpenAI models in the Voice Agent API workflow. We have reached out and communicated with OpenAI to help resolve.

6. resolved Oct 29, 2025, 10:02 PM UTC

   As of 19:28 UTC OpenAI's LLMs are no longer returning 500 errors. We are still in conversation with OpenAI about what happened.