xAI Grok audio models now available on Vercel AI Gateway

xAI's audio models are now live on AI Gateway. Realtime voice, text to speech, and speech to text are all available through the AI SDK with the same routing, observability, and spend controls as your other models.

These capabilities are available on the AI SDK 7 release.

Available models

Capability	Models
Realtime voice	xai/grok-voice-think-fast-1.0
Text to speech	xai/grok-tts
Speech to text	xai/grok-stt

Realtime

A voice agent has two pieces: a server route that mints a short-lived token, so your API key never reaches the client, and a browser component that connects with it.

Add the token route: this example sets model to xai/grok-voice-think-fast-1.0:

Then connect from the browser. The useRealtimehook from @ai-sdk/react fetches that route and manages the WebSocket connection, microphone capture, and audio playback:

Text to speech

Generate spoken audio from text with generateSpeech. Pass a voice and an output format, then write the result to a file with xai/grok-tts:

Speech to text

Transcribe recordings into text with transcribe. This example uses xai/grok-stt:

Playground

You can also try the xAI audio models directly in the AI Gateway playground. Open the models list and click into any of the models to use them directly in the browser. The xai/grok-voice-think-fast-1.0 playground here allows you to talk to the agent and see responses instantly:

More information

• Realtime quickstart

• Speech quickstart

• See all xAI models

Read more