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Grok STT

Grok STT is xAI's speech-to-text model. It transcribes recorded audio into text across 25 languages, available through Vercel AI Gateway with the AI SDK.

Websockets
index.ts
import { experimental_streamTranscribe as streamTranscribe } from 'ai';
import { createGateway, gateway } from '@ai-sdk/gateway';
import { readFile } from 'node:fs/promises';
const modelId = 'xai/grok-stt';
// Mint this on your server, then send only the short-lived token to the client.
const { token } = await gateway.experimental_transcription.getToken({
model: modelId,
});
const clientGateway = createGateway({ apiKey: token });
// Raw 24 kHz, 16-bit signed little-endian mono PCM audio.
const bytes = await readFile('audio.pcm');
const audio = new ReadableStream<Uint8Array>({
start(controller) {
controller.enqueue(new Uint8Array(bytes));
controller.close();
},
});
const result = streamTranscribe({
model: clientGateway.transcription(modelId),
audio,
inputAudioFormat: { type: 'audio/pcm', rate: 24000 },
});
for await (const part of result.fullStream) {
if (part.type === 'transcript-delta') {
process.stdout.write(part.delta);
}
}
console.log('\nFinal:', await result.text);

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Provider
Input
Capabilities
ZDR
No Training
Release Date
xAI
Legal:Terms
Privacy
$0.20/hr+1 more
03/16/2026