Retell AI Agent started speaking Chinese mid conversation

Support Help
1

During one voice conversation, our AI agent started speaking Chinese and with what looks like a part of Retell AI’s source code.

Here is the call log id: call_622159801b600e40067678e1181

2

Hi @rowell

Thanks for reaching out. I’ve shared your call ID with our team for review.

We’ll update you as soon as we have more information.

Thank You

3

Thanks Mark.

Looking forward to hearing what happened because the Chinese text was about Lottery and etc which we don’t have it any of our data.

4

Hi @rowell

It looks like you’re currently using GPT 5.4, which may sometimes produce hallucinations. We recommend switching to GPT 4.1 for more accurate and reliable responses.

Thank You