StudioRetell uses OpenAI models to power 100M monthly calls
Original title: Retell uses OpenAI models to help power 100M monthly calls
Retell uses OpenAI models to power 100 million calls per month, with GPT-6 Astra topping Retell's voice agent benchmark. The company says Codex helped it reach a $1.6M annual revenue run rate per employee.
Why it matters
An official OpenAI customer case with concrete scale figures for Retell's voice agents and how its model choices performed, useful as a reference.
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