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Updated , rescanned every two hoursWednesday, October 28, 2026

Retell scales to 100M monthly calls with GPT-6 voice agent

AgentsCodingVoice

What is Retell uses OpenAI models to help power 100M monthly calls?

Retell’s platform uses OpenAI’s GPT-6 Astra to run conversational voice agents that can handle about 100 million calls each month. Codex also powers its backend, helping the company reach a $1.6 million annual revenue run-rate per employee.

Who it is for

Anyone building call-center bots or voice assistants can see how a single employee can drive that level of call volume and revenue.

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