# Retell powers 100M monthly calls with OpenAI

> Retell AI uses OpenAI models to handle 100M+ monthly calls with 80%+ resolution rates.
- Title: Retell powers 100M monthly calls with OpenAI · OpenAI
- Summary: Retell AI uses OpenAI models to handle 100M+ monthly calls with 80%+ resolution rates. Retell AI platform processes over 100 million monthly calls for…
- Keywords: retell, openai, gpt-6, codex, voice ai, contact center, customer resolution, ai agents, monthly calls, 100m, technology, powers
- Source: OpenAI — https://openai.com/index/retell-ai
- Read time: 1 min
- Topics: retell, openai, gpt-6, codex, voice ai, contact center, customer resolution, ai agents, monthly calls, 100m, ai, technology
## Retell AI platform
Retell AI is a voice AI platform for contact center operations helping businesses build agents that answer questions, take action, and connect callers with people.
## 100M+ monthly calls
Retell serves over 4,000 businesses with monthly call volume growing from 30 million in early 2026 to more than 100 million by September.
## 80%+ customer resolution
Customers achieve resolution rates above 80% using Retell's voice agents for complex workflows.
## 1 trillion tokens consumed
Retell has surpassed 1 trillion tokens consumed across OpenAI models, reflecting high adoption scale.
## GPT-6 Astra benchmark
GPT-6 Astra ranked first for instruction following at 89.7% in Retell's October 13, 2:026 benchmark.
## Codex for engineering
Retell engineers use Codex to research, build, and debug code, improving efficiency and accuracy.
## OpenAI models in action
OpenAI models generate responses for 80% of calls, with customers achieving resolution rates above 80%.
## $1.6M revenue per employee
Retell reports $1.6 million annual revenue run rate per employee, indicating strong financial performance.
## Anker case study
Anker achieved 80.4% case resolution rate and NPS of 63 using Retell for post-sales support.
## Key takeaway

Retell AI platform processes over 100 million monthly calls for businesses using OpenAI models, achieving 80%+ customer resolution rates.