OpenAI says Retell uses GPT-6 Astra to power 100M monthly calls

OpenAI said Retell is using its models to help power 100 million monthly calls, highlighting how the company is applying GPT-6 Astra and Codex across voice-agent workflows. The post, published October 27, 2026, also said GPT-6 Astra tops Retell’s voice agent benchmark and that Codex helped Retell reach a $1.6 million annual revenue run rate per employee. According to OpenAI’s October 27, 2026 post, Retell is using OpenAI models to support a large-scale voice platform handling 100 million calls a month. OpenAI attributed two specific outcomes to its products: GPT-6 Astra leading Retell’s voice agent benchmark, and Codex contributing to a $1.6 million annual revenue run rate per employee. Those figures were stated by OpenAI in the source material and are not independently verified here.

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