OpenAI· GPT / ChatGPT / API

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.

From the source

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

openai.com

Announced

26 Jun 2025 10:00 UTC

Detected

03 Aug 2026 21:11 UTC (+403d after)