Retell uses OpenAI models to power 100 million monthly calls, hits $1.6M revenue per employee run rate

Retell, a voice agent platform, reports that its monthly call volume has surpassed 100 million. The company attributes its growth to OpenAI models, specifically GPT-6 Astra for voice benchmark performance and Codex for development assistance, which together enabled a $1.6 million annual revenue run rate per employee.