Dear Support Team, I have attached the complete call transcript along with the caller ID for your reference. The call was unexpectedly terminated with the error: call.in-progress.error-providerfault-openai-llm-failed. Could you please help us understand the possible reason for this failure? Additionally, we would appreciate any guidance on how to prevent such issues from occurring in the future. Thank you for your support. call transcript - User Hello. This is Kevin. 8:35:38 PM(+00:01.92) Assistant Hi. This is Athena with Martin Heating and Air A LLC. I'm reaching out about your service agreement that you have with us I'm just calling to make sure you don't miss your included spring tune up. Have you already scheduled that, or do you want me to help you take care of it? 8:35:40 PM(+00:03.96) User I I haven't, but I just barely got the unit installed a few months, you know. 3 or 4 months ago. So I don't know if it needs it. 8:35:59 PM(+00:22.78) Assistant That's a great question, Kevin. I and I completely understand. Even with a newer system, your service agreement includes routine maintenance to keep everything running efficiently and protect your warranty. The tune up helps make sure everything is calibrated properly and catches anything early. Would you like me to check what days we have available for you? 8:36:09 PM(+00:32.40) User Yeah. Go ahead and schedule it. 8:36:27 PM(+00:50.86) Assistant Absolutely. I'd I'd be happy to help with that. What day works best for you? 8:36:31 PM(+00:54.55) User It doesn't matter. Any weekday. Preferably in the afternoon. 8:36:36 PM(+00:59.29) Assistant Just to confirm, are you referring to Friday, March 13? 8:36:45 PM(+01:08.22) User That's fine. Yeah. Hey. I'm gonna just to go ahead and schedule and check the date. I'm actually on another right now. Okay. Hello? 8:36:49 PM(+01:13.04) call.in-progress.error-providerfault-openai-llm-failed 08:37 PM Call id - 019ce0f5-f73d-7338-bee2-a0bb65348dc6

The error

call.in-progress.error-providerfault-openai-llm-failed

indicates that the call was terminated due to an issue on the OpenAI provider's side, such as a temporary outage or internal error—not a configuration problem on your end. Actionable step: Retry the call after a short interval. If the problem persists, please contact support with your call ID (

019ce0f5-f73d-7338-bee2-a0bb65348dc6

) so they can investigate provider logs in detail. Reference: See the "providerfault" error explanation in the [Vapi documentation](https://docs.vapi.ai/calls/call-ended-reason). Source: - [Call ended reasons (Vapi documentation)](https://docs.vapi.ai/calls/call-ended-reason)

Hi, This call dropped due to a transient OpenAI service degradation — Vapi sent a completion request that timed out with no response from OpenAI's end. This was not an issue with your configuration. To improve resilience going forward, we recommend configuring a fallback model (e.g.

gpt-4o

) in your assistant settings so calls can recover automatically if the primary model times out. Let me know if you have any questions!

Have you been able to solve this or you still need help? @Azhar