xAI: Grok Voice STT 1.0

Grok Voice STT 1.0 is xAI's speech-to-text model. It supports transcription with word-level timestamps, optional speaker diarization, and multichannel audio.

Model lab: xAI
Model family: —

Modalitiesaudio → text

Context window15,000

Maximum output15,000

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Quickstart

Use your Moduck API Key, set the API base URL to https://api.moduck.ai/v1, and set the model parameter to xai/grok-voice-stt-1.0.

import os
import requests

base_url = "https://api.moduck.ai/v1"
api_key = os.environ["MODUCK_API_KEY"]
model_id = "xai/grok-voice-stt-1.0"

response = requests.post(
    f"{base_url}/chat/completions",
    headers={
        "Authorization": f"Bearer {api_key}",
        "Content-Type": "application/json",
    },
    json={
        "model": model_id,
        "messages": [{"role": "user", "content": "Hello!"}],
        "stream": False,
    },
    timeout=60,
)
response.raise_for_status()
print(response.json())

Use the familiar OpenAI-style chat request format to make model integration easier.

Grok Voice STT 1.0 API Pricing

Price currently unavailable

Performance

Performance trends

Throughput87.9 tok/sCurrent

Time to first token1.4 sCurrent

End-to-end latency7.4 sCurrent

Throughput

Current87.9 tok/s

Window average89.4 tok/s

Time to first token

Current1.4 s

Window average1.4 s

End-to-end latency

Current7.4 s

Window average7.5 s

Tail latency (P99)

Current15.5 s

Window average17.1 s

Prompt cache hit rate

Current18.0%

Window average24.7%

Error rate

Current0.0%

Window average0.1%

Availability

Uptime100%At least one provider responded

Availability100%Requests actually served

Error rate0%Share of failed requests

Served requests, hour by hour

24 hours agoNow

Grok Voice STT 1.0 Compare models

Model	Input price	Output price	Context window	Capabilities
Grok Voice STT 1.0This page	Price currently unavailable	Price currently unavailable	15,000	Text output
Gemini 3.5 Transcribe Live	USD 0.00012 / second · Billed by input audio duration	Not billed on output	—	Text output
GPT Realtime Whisper	USD 0.0002272 / second · Billed by input audio duration	Not billed on output	16,000	Text output
Whisper 3 Large	USD 0.00184 / 1M tokens	USD 0.00184 / 1M tokens	448	Text output
Whisper Large v3 Turbo	USD 0.00184 / 1M tokens	USD 0.00184 / 1M tokens	448	Text output

Model specifications

Input: audio
Output: text
Context window: 15,000
Maximum output: 15,000
Release date: 2026-08-04
Attachments: Yes
Reasoning: No
Tool calling: No
Temperature setting: No
Open weights: No

Frequently asked questions

What is Grok Voice STT 1.0 for?

Grok Voice STT 1.0 is xAI's speech-to-text model. It supports transcription with word-level timestamps, optional speaker diarization, and multichannel audio.

What inputs and outputs does Grok Voice STT 1.0 support?

Recorded inputs: audio; outputs: text.

How is Grok Voice STT 1.0 priced?

This page does not list a price for this model yet.

What specifications are recorded for Grok Voice STT 1.0?

Current model records list Context window 15,000 tokens; Maximum output 15,000 tokens.

What model parameter does the Quickstart use?

The example uses xai/grok-voice-stt-1.0. This value comes from the page identifier and is not confirmed as a callable Moduck public ID.

Can I call this model through the Moduck API now?

This page has no verified Moduck API call for this model. A Quickstart example or reserved ID does not establish access; check the models available to your account.