Apr 30, 2026
Custom Voices
Your voice. Your brand. Clone a voice from a short recording and use it across Grok Text to Speech and Voice Agent APIs.
Listen to this blog post
Clone your voice
Read Docs
Clone your voice
Read Docs
Listen to this blog post
Today, we’re introducing Custom Voices. Clone your voice from a few seconds of audio and use it instantly across Grok Text to Speech and Voice Agent APIs.
Tyler
SpaceX Broadcast Host
ORIGINAL
CLONED
Use Cases
Custom Voices unlock a new class of applications.
Live Support
I need help with my recent order.
Of course! Let me pull up your order details.
Brand Voice Agents
Give your customer support agent a consistent, recognizable voice that matches your brand identity, not a generic preset.
Rec
00:42
In today’s episode we dive deep into the future of AI and what it means for creators everywhere
Content Creators
Narrate videos, podcasts, and social posts in your own voice at scale, without re-recording every time.
Original
Preserved
Accessibility
Create personalized voices for individuals who have lost the ability to speak, preserving their vocal identity.
🇺🇸
🇪🇸
🇫🇷
🇩🇪
🇨🇳
🇯🇵
🇺🇸English
🇪🇸Spanish
🇫🇷French
🇩🇪German
🇨🇳Chinese
🇯🇵Japanese
Multilingual Teams
Deliver your CEO’s keynote in every major language — naturally in English, Spanish, French, German, Chinese, Japanese, and more.
NarratorThe ancient door creaked open…
KiraWe need to move. Now.
ThaneI have a bad feeling about this.
Gaming & Entertainment
Bring characters to life with unique voices without scheduling studio time for every line of dialogue.
Chapter 3
The Discovery
She opened the notebook and found the handwriting unmistakably her own though she had no memory of writing it
4:12
12:34
Podcasts & Audiobook Narration
Make your narrative engaging. Turn scripts into full audiobooks narrated in your own voice, chapter by chapter, without stepping into a studio.
Live Support
I need help with my recent order.
Of course! Let me pull up your order details.
Rec
00:42
In today’s episode we dive deep into the future of AI and what it means for creators everywhere
Original
Preserved
🇺🇸
🇪🇸
🇫🇷
🇩🇪
🇨🇳
🇯🇵
🇺🇸English
🇪🇸Spanish
🇫🇷French
🇩🇪German
🇨🇳Chinese
🇯🇵Japanese
NarratorThe ancient door creaked open…
KiraWe need to move. Now.
ThaneI have a bad feeling about this.
Chapter 3
The Discovery
She opened the notebook and found the handwriting unmistakably her own though she had no memory of writing it
4:12
12:34
Brand Voice Agents
Give your customer support agent a consistent, recognizable voice that matches your brand identity, not a generic preset.
Custom Voices
Clone your voice in under two minutes. Use it everywhere.
Record about a minute of natural speech in the xAI console. Our pipeline verifies you’re the voice owner, processes your recording, and delivers a production-ready voice model, all in under two minutes. Your custom voice inherits every TTS capability: speech tags, multilingual output, and both REST and WebSocket streaming.
PASSPHRASE CHECK
RECORDING
My voice is my key
Step 1Read a passphrase aloud to confirm your identity
Custom voices work everywhere our built-in voices do. Pass the
voice_id to any TTS
endpoint
or use it with the Voice Agent
API
for real-time conversational agents.
There is no extra charge to use Text to Speech or Voice Agent APIs with custom voices.
Voice Safety
Every custom voice goes through a two-stage verification process before it can be created. First, the speaker reads a verification phrase that our STT engine transcribes and matches in real time, confirming intent and presence. Then we compute speaker embeddings from the verification clip and the full recording to confirm they belong to the same person.
You can’t clone a voice from a pre-existing recording, and you can’t clone someone else’s voice.
PASSPHRASE CHECK
RECORDING
My voice is my key
Passphrase Check
Read a verification phrase aloud. Our STT engine transcribes and matches it in real time, verifying your consent and presence.
SPEAKER SIMILARITY
IDLE
PASSPHRASE
–
RECORDING
Speaker Similarity
Speaker embeddings from the passphrase and the full recording are compared to confirm they belong to the same person.
Clone your voice
Custom Voices Docs
Voice Agent API
Last updated Oct 08, 2026