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xAI · Audio

Grok Speech to Text API pricing

xai/grok-stt-1.0

Speech-to-text. Grok Speech to Text by xAI, routed through INFRO on a xAI account you connect — alongside every other provider you run. xAI bills you for it directly, on that account and at your own rate. INFRO adds routing, failover, request logs, cost attribution and policy around it, and takes no part of what you pay xAI.

Pricing

Per audio hourUSD · updated 2026-10-05

xAI rate

$0.10

per audio hour, billed to you by xAI

INFRO adds

$0

0% markup on model spend

Calling Grok Speech to Text

POST /v1/audio/speech
import os
from infro import Infro

client = Infro(api_key=os.environ["INFRO_API_KEY"])

transcript = client.audio.transcriptions.create(
    model="xai/grok-stt-1.0",
    file=open("meeting.mp3", "rb"),
)

What this modality supports

  • Text to speech
  • Music generation
  • Transcription
  • Diarization

Text-to-speech with streaming playback, full-track music generation, and transcription with timestamps and diarization. Billed per character generated, per track, and per hour transcribed.

QuickstartGet a key

Alternatives for speech-to-text

Same modality, nearest in price. All of them share the request shape above, so comparing them is a one-word change.

Work out what Grok Speech to Text would cost you

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