Oct 27, 2026, 3:00 PMArtificial Intelligence
Retell Uses OpenAI Models for 100M Monthly Calls, Hits $1.6M Revenue per Employee
Retell uses OpenAI's GPT-6 Astra and Codex to support 100 million monthly calls, while reaching a $1.6 million annual revenue run rate for each employee.
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Summary
Retell uses OpenAI models to help power 100 million calls a month. GPT-6 Astra leads Retell’s voice agent benchmark, while Codex helps the company reach a $1.6 million annual revenue run rate per employee. The figures were published on October 27, 2026.
Details remain limited. Benchmark methodology, competing model scores, Codex’s precise contribution and each model’s share of Retell’s monthly call traffic are unspecified.
Positives
- 100 million monthly calls demonstrate the scale at which Retell is using OpenAI models.
- GPT-6 Astra ranks first in Retell’s voice agent benchmark.
- $1.6 million in annual revenue run rate per employee indicates high revenue efficiency, with Codex contributing to the result.
Risks & concerns
- Benchmark methodology and competing model scores remain unspecified, limiting assessment of GPT-6 Astra’s lead.
- Codex’s precise contribution to Retell’s $1.6 million annual revenue run rate per employee is unclear.
- The breakdown of OpenAI model usage across Retell’s 100 million monthly calls is unavailable.
Primary sourceOpenAI Newshttps://openai.com/index/retell-ai
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