# Retell Uses OpenAI Models to Power 100M Monthly Calls

Retell is using OpenAI models to support 100 million calls per month. The milestone shows how AI voice agents are scaling in customer-facing phone interactions and how companies are building on OpenAI infrastructure.

**Importance:** 2/5

## Sources

### Science
- [OpenAI Blog](https://openai.com/index/retell-ai) — Tue, 27 Oct 2026 15:00:00 GMT