# OpenAI — Customizable, no-code voice agent automation with GPT-4o

- Company: OpenAI (openai.com)
- Announced: 2025-06-26T10:00:00+00:00
- Subject: GPT / ChatGPT / API
- Models affected: GPT-4o, GPT-4.1
- Source: https://openai.com/index/retell-ai
- Record: https://forck.live/items/535-customizable-no-code-voice-agent-automation-with-gpt-4o

Retell AI is using GPT-4o and GPT-4.1 to provide no-code voice agent automation for call centers, reducing costs and improving customer satisfaction.

## Evidence

Verbatim from https://openai.com/index/retell-ai:

> Retell AI is transforming the call center with AI voice automation powered by GPT-4o and GPT-4.1.

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