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Grok Voice Think Fast 1.0

Grok Voice Think Fast 1.0 is xAI's realtime voice model for speech-to-speech agents, streaming audio bidirectionally over WebSocket through Vercel AI Gateway.

index.ts
import { gateway } from '@ai-sdk/gateway';


export async function POST() {
  const { token, url } = await gateway.experimental_realtime.getToken({
    model: 'xai/grok-voice-think-fast-1.0',
  });


  return Response.json({ token, url, tools: [] });
}
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About Grok Voice Think Fast 1.0

Grok Voice Think Fast 1.0 is xAI's realtime voice model, released April 23, 2026 and available through AI Gateway. Grok Voice Think Fast 1.0 handles full-duplex, speech-to-speech conversation: audio streams in, and spoken replies stream back with low latency. Background reasoning lets Grok Voice Think Fast 1.0 think through hard queries while the conversation keeps moving. xAI positions the model for customer support, sales, and other high-stakes voice workflows.

Grok Voice Think Fast 1.0 captures structured data from natural speech, including email addresses, street addresses, phone numbers, and account numbers, even through accents and mid-sentence corrections. Tool calling works inside the session, so a voice agent can act on external systems mid-conversation. xAI reports support for conversations in more than 25 languages and robustness under telephony conditions like noise and interruptions.

Through AI Gateway, a server route mints a short-lived token with gateway.experimental_realtime.getToken, so your API key never reaches the client. In the browser, the useRealtime hook from @ai-sdk/react manages the WebSocket connection, microphone capture, and audio playback. In Node.js, the realtime model acts as a codec for a WebSocket you drive yourself. Session config covers voice, turn detection, instructions, and tools. Realtime support ships on the canary releases of the AI SDK, and you can try Grok Voice Think Fast 1.0 in the AI Gateway playground at https://ai-sdk.dev/playground/xai:grok-voice-think-fast-1.0.