For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
Atoms PlatformProduct OverviewDeveloper GuideAPI ReferenceMCPIntegrationsDeveloper ToolsChangelog
Atoms PlatformProduct OverviewDeveloper GuideAPI ReferenceMCPIntegrationsDeveloper ToolsChangelog
  • Get Started
    • Quick start
    • Platform overview
  • Single Prompt Agents
    • Overview
      • Writing Prompts
      • Model Selection
      • Voice Selection
  • Conversational Flow Agents
    • Overview
  • Features
    • Concurrency
    • Knowledge Base
    • Webhooks
    • Widget
    • Integrations
    • Post-Call Metrics
    • Versioning
    • Variables
    • API Calls
  • Deployment
    • Phone Numbers
    • Audiences
    • Campaigns
  • Analytics & Logs
    • Overview
    • Testing
    • Conversation Logs
    • Locking
  • Integrate
    • Embed a voice agent
    • WebSocket SDK
  • Cookbooks
    • Using Cookbooks
  • Reference
    • Quick Reference
    • Glossary
  • Troubleshooting
    • Error reference
    • FAQ
    • Getting Help
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Voice AgentsModels
Voice AgentsModels
On this page
  • Available Models
  • Related Settings
Single Prompt AgentsPrompt Section

Model Selection

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The Prompt Editor

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Voice Selection

Built with

The model is your agent’s brain. It’s what understands what callers say, figures out how to respond, and generates the words your agent speaks. Different models have different strengths — some are faster, some are more expressive, some are more affordable.

Location: Prompt Section (top bar) → Model dropdown

Model dropdown

Model selection dropdown

Available Models

ModelProviderTypeCredit Usage
ElectronSmallest AITraditionalLower
GPT-4oOpenAITraditionalModerate
GPT-4.1OpenAITraditionalModerate
GPT RealtimeOpenAIEmotiveHigher
GPT Realtime MiniOpenAIEmotiveHigher

Emotive models have emotional awareness — they pick up on caller tone and respond with natural expression.

Getting started? GPT-4o is a great all-rounder — reliable, capable, and well-tested.

Try Electron. It’s our own model, built specifically for voice. Fast, affordable, and optimized for real-time conversations.

You can switch models anytime — nothing breaks when you do.


Related Settings

Voice Selection

Pick your agent’s voice

Model Settings

Language switching & fine-tuning