Retell uses OpenAI models to help power 100M monthly calls
GPT-6 Astra tops Retell’s voice agent benchmark, while Codex helps it reach a $1.6M annual revenue run rate per employee.
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Research analysis
Research claim
Source account: GPT-6 Astra tops Retell’s voice agent benchmark, while Codex helps it reach a $1.6M annual revenue run rate per employee.
Evaluation record
Recent records to compare: “Cognitive Bias Signatures in Search-Equipped LLM Agents: A Stage-Resolved Analysis” (arXiv, Nov 5, 2026); “Prospective Memory for Proactive LLM Agents” (arXiv, Nov 5, 2026). Shared themes are navigation hints; they have not been verified as the same need or independent corroboration.
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Verification plan
Read the paper or model card and its evaluation appendix. Reproduce one bounded result against the stated baseline, then test a representative user task and record where the conclusion fails.