xAI.Grok.<voice>
Five expressive voices with 20+ language support and auto-detected language detection.
Grok is the second Expressive Mode provider alongside Ultra, supporting inline speech tags for pauses, laughter, whispers, and emphasis.
Voices
| Voice | Description |
|---|---|
xAI.Grok.Ara | Ara — distinct character and tone |
xAI.Grok.Eve | Eve — distinct character and tone |
xAI.Grok.Leo | Leo — distinct character and tone |
xAI.Grok.Rex | Rex — distinct character and tone |
xAI.Grok.Sal | Sal — distinct character and tone |
Expressive Mode
Grok voices support Expressive Mode, letting AI agents dynamically adjust tone and emotion during live conversations. The AI model controls emotional delivery using inline speech tags for pauses, laughter, whispers, and emphasis — without hard-coding emotions into prompts. To enable Expressive Mode, toggle it on in your assistant’s Voice settings.Language Support
Grok voices support 20+ languages with auto-detected language support and BCP-47 code support for consistent output.On-Network Processing
Grok voices run through Telnyx-hosted models, keeping audio and inference on the same private backbone.Getting Started
- Go to Mission Control → AI → Assistants → select your assistant → Voice tab.
- Select an xAI Grok voice (Ara, Eve, Leo, Rex, or Sal).
- Toggle Expressive Mode on.
- Save your assistant.