xAI TTS V1
xAI TTS V1 from xAI generates natural speech from text with support for inline speech tags like `[laugh]`, `[pause]`, `[sigh]` and wrapping tags like `<whisper>text</whisper>` and `<slow>text</slow>` for expressive delivery control. Supporting 20+ languages with five distinct voice options (eve, ara, rex, sal, leo), it handles up to 15,000 characters per request. Multiple output formats including MP3, WAV, and PCM at configurable sample rates.
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xAI TTS V1 from xAI generates natural speech from text with support for inline speech tags like `[laugh]`, `[pause]`, `[sigh]` and wrapping tags like `<whisper>text</whisper>` and `<slow>text</slow>` for expressive delivery control. Supporting 20+ languages with five distinct voice options (eve, ara, rex, sal, leo), it handles up to 15,000 characters per request. Multiple output formats including MP3, WAV, and PCM at configurable sample rates.
Connect Claude, Cursor, VS Code, or Codex to Layer’s MCP server and xAI TTS V1 becomes a tool your agent can reach for — it picks the parameters, runs the generation, and shows you the result in the conversation.
https://mcp.app.layer.ai/mcpAsk your agent
“Use xAI TTS V1 for a heavy stone door grinding open in a dungeon.”
execute_forge({
"base_model_id": "xai-tts-v1",
"prompt": "A heavy stone door grinding open in a dungeon",
"batch_size": 1
})Authenticate with a personal access token, post the model’s own form, and poll the inference until it completes. Every field below is accepted by this endpoint.
# Start the generation — returns an inference id straight away.
curl -X POST https://api.app.layer.ai/api/v2/workspaces/$WORKSPACE_ID/base-models/xai-tts-v1/inferences \
-H "Authorization: Bearer $LAYER_TOKEN" \
-H "Content-Type: application/json" \
-d '{
"prompt": "A heavy stone door grinding open in a dungeon"
}'
# Poll until status is "complete" — the response then carries the asset URLs.
curl https://api.app.layer.ai/api/v2/workspaces/$WORKSPACE_ID/inferences/$INFERENCE_ID \
-H "Authorization: Bearer $LAYER_TOKEN"- prompt stringrequired
- The text the voice speaks.
- prompt_language string
- The language the voice speaks in.
Why use xAI TTS V1 for audio?
Natural voice generation
xAI TTS V1 produces expressive, high-quality audio suitable for character dialogue, narration, and voiceover work.
Flexible content types
Supports a range of use cases from in-game dialogue and cinematics to marketing narration and social media content.
Fast iteration
Generate and refine audio content quickly, enabling rapid prototyping of character voices and sound design.
Character voiceover and dialogue production
Generate expressive character voices for in-game dialogue, cutscenes, and interactive narratives. Iterate on tone and delivery rapidly.
Marketing narration and promotional audio
Create professional voiceovers for trailers, app store videos, and social media content without booking voice talent.
Sound design exploration and prototyping
Quickly prototype sound effects, ambient audio, and musical elements to test creative directions early in production.
FAQ
How much does xAI TTS V1 cost? Is it free?+
How does Layer's pricing work?+
There are no seat fees, feature gates, or plans on Layer. Instead, our platform uses a consumption based system with Creative Units (CUs) with a flexible monthly subscription. Every generation on Layer (image, video, 3D, or audio) consumes a Creative Unit, and you only pay for what you create.
What Elo score does xAI TTS V1 have?+
Other audio models on Layer
ElevenLabs Multilingual V2
ElevenLabs
Multilingual text-to-speech with natural voice selection and stability controls.
ElevenLabs TTS V3
ElevenLabs
ElevenLabs' most expressive TTS model with inline audio tags for emotion and delivery.
ElevenLabs Sound Effects
ElevenLabs
Generate custom sound effects from text descriptions with duration and prompt control.
Gemini 3.1 Flash TTS
Google's most controllable TTS model with 200+ audio tags for vocal style and delivery.
Sonilo Sound Effects 1.1
Sonilo
High-quality, commercial-use-safe sound effects from text with exact duration control.
Gemini 3.8 Flash Lite TTS
The lighter, lower-cost tier of Google's Gemini 3.8 text-to-speech model.