Retell AI Pricing & Cost Breakdown (2026)

How Retell AI pricing works

Your per-minute cost is a stack of a few components. The biggest lever is the LLM you choose.

• LLM cost — the model doing the thinking (the main variable)
• Retell platform fee — per minute of conversation
• Telephony — the cost of the phone call itself
• Optional add-ons (knowledge base, integrations)

LLM cost comparison (the main driver)

You can swap the model to balance quality and cost. A simple booking agent doesn't need the most expensive model.

• GPT nano (~$0.003/min) — ultra-cheap, high-volume simple flows
• Gemini Flash (~$0.027/min) — fast, good for multilingual
• GPT 4.1 (~$0.045/min) — the best all-round default
• Claude Sonnet (~$0.08/min) — highest reasoning for complex calls

What it might cost per month

A rough example: an agent handling 500 calls a month at ~3 minutes each is ~1,500 minutes. At a mid-range model plus fees, that's a modest monthly bill — usually far less than a part-time receptionist.

• Cost scales with call volume × minutes
• Low-volume businesses pay very little
• High-volume: pick a cheaper model to keep it lean
• Still typically cheaper than staffing phones

How to keep Retell AI costs down

A few smart choices make a big difference.

• Match the model to the task (don't over-pay)
• Keep prompts tight so calls stay efficient
• Use a knowledge base so calls resolve faster
• Route only the right calls to the agent

Official resources

For primary documentation, see: Make.com · n8n · Zapier.