Grok TTS

xai/grok-tts

xAI's text-to-speech service at /v1/tts, generally available since March 2026, with no model selector. Covers 20 languages plus auto-detect, built-in voices (eve by default) or cloned custom voices, inline speech tags and WebSocket streaming.

Get API Key Read the Docs

curl "$AUDIOLAB_API_URL/v1/audio/speech" \
  -H "Authorization: Bearer $AUDIOLAB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "xai/grok-tts",
  "input": "Make every word count.",
  "voice": "auto",
  "response_format": "mp3"
}' --output speech.mp3

Input Price: $12.75 / 1M characters
Output Price: —
Input: Text
Output: Audio

Capabilities

Explore what Grok TTS supports, then use the API section for a request tailored to this model.

BatchStreamVoices

Languages

Multilingual

Model Information

Provider: xAI
Product: Text-to-Speech
Release Date: Mar 2026
Data Policy: No training
Region: Global
Input: Text
Output: Audio

Provider Documentation

Playground

Try Grok TTS by xAI. Requests use the selected workspace’s credits and API pricing.

Grok TTS

Providers

Compare available endpoints, pricing, and context limits for Grok TTS.

Provider	Context	Output	Input Price	Output Price	Endpoint
xAI	Not specified	Audio	$12.75 / 1M characters	—	`xai/grok-tts:xai`

Prices are catalog rates. Your workspace’s estimate and endpoint pricing determine the final charge.

Input and Output Limits

Formats and limits AudioLab enforces on each request.

Limit	Value
Max chars	2000
Formats	mp3, wav, pcm, ulaw, alaw

Provider Notes

xAI exposes one /v1/tts service contract with no upstream model selector; xai/grok-tts is AudioLab's routing slug for it. It supports native bidirectional text.delta, text.done, and text.clear events through AudioLab's speech WebSocket route, plus built-in or custom voice IDs.

Performance

Uptime100%

Time to First AudioMedianP90256 ms

Throughput—

Performance

Status

Current catalog availability. Your workspace’s access is checked separately before a request runs.

Checking availability…

A live availability check is not available right now.

Getting Started

Use your workspace API key and the exact model identifier below. Set the API URL to the endpoint shown in your workspace and keep credentials on your server.

curl "$AUDIOLAB_API_URL/v1/audio/speech" \
  -H "Authorization: Bearer $AUDIOLAB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "xai/grok-tts",
  "input": "Make every word count.",
  "voice": "auto",
  "response_format": "mp3"
}' --output speech.mp3

Read the Endpoint Reference

Request Parameters

Available parameters depend on the provider and request format. The endpoint reference explains accepted values and required fields.

Parameter	Details
`model`	`xai/grok-tts` — Required model identifier.
`output_format`	View Accepted Values
`optimize_streaming_latency`	View Accepted Values
`text_normalization`	View Accepted Values
`with_timestamps`	View Accepted Values

Input and Output Limits

Formats and limits AudioLab enforces on each request.

Limit	Value
Max chars	2000
Formats	mp3, wav, pcm, ulaw, alaw

Similar Models

Explore more text-to-speech and compare their capabilities.

Model	Context	Input Price	Output Price
Sonic 3.6Cartesia	Not specified	$38.25 / 1M characters	—
Sonic 3.6 (2026-08-27)Cartesia	Not specified	$38.25 / 1M characters	—
tts-rt-v2Soniox	Not specified	$11.985 / 1M characters	—
Inworld TTS-2 FlashInworld AI	Not specified	$12.75 / 1M characters	—
audio8DeepInfra	Not specified	$4.25 / 1M characters	—
qwen-audio-3.0-tts-flashAlibaba Cloud Model Studio	Not specified	$12.75 / 1M characters	—

View All Text-to-Speech