ModelInfo
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Grok Voice Think Fast 2.0

xAI speech-to-speech voice model with improved intelligence, transcription accuracy and conversational capabilities.

xAIgrok-voice-think-fast-2.02026-07-29Report incorrect data

Specs

Context
—
Max output
—
Input price
—
Output price
—
Released
2026-07-29

Context

Not published

Pricing

Not published

Modalities

Input
TextAudio
Output
TextAudio

API

API types
realtime

Reasoning

Not published

Info

Status
Active
Released
2026-07-29
Knowledge cutoff
—

Features

Confirmed
tools
Source · official docsVerified 2026-10-11

How to call

1 provider

xaimodel = grok-voice-think-fast-2.0

realtime
GEThttps://api.x.ai/v1/realtime

JSON

Standard format
grok-voice-think-fast-2.0.json
{
  "id": "grok-voice-think-fast-2.0",
  "object": "model",
  "created": 1785283200,
  "owned_by": "xai",
  "name": "Grok Voice Think Fast 2.0",
  "api": {
    "types": [
      "realtime"
    ]
  },
  "limits": {
    "context": null,
    "input": null,
    "output": null
  },
  "modalities": {
    "input": [
      "text",
      "audio"
    ],
    "output": [
      "text",
      "audio"
    ]
  },
  "reasoning": {
    "supported": null,
    "efforts": []
  },
  "pricing": null,
  "features": [
    "tools"
  ],
  "info": {
    "status": "active",
    "release_date": "2026-07-29",
    "knowledge_cutoff": null,
    "description": "xAI speech-to-speech voice model with improved intelligence, transcription accuracy and conversational capabilities.",
    "docs": "https://docs.x.ai/developers/models/grok-voice-think-fast-2.0",
    "verified_at": "2026-10-11"
  }
}

Official sources

4