Grok 4

xAI

xAI flagship model with first-principles reasoning, enhanced logical consistency, and multimodal support. Features 256K context window with extended context billing above 128K tokens.

Text Generation API Grok Family

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Parameters

params

Context Window

256K

tokens

Max Output

tokens

Input Price

per 1M tokens

Output Price

$15

per 1M tokens

Grok Family 9 models

The full Grok line by generation — pricing and capabilities vary across the family.

4.3

4.3 Latest

General reasoning, coding, multimodal (video) understanding

4.20

General-purpose, reasoning, fast inference

Grok

4 Current

$3 / $15

in / out · 1M

Jul 2025

Real-time knowledge, wit

Real-time knowledge, humor

$5 / $15

in / out · 1M

Feb 2025

Capabilities

👁️

Vision

⚡

Function Calling

📋

JSON Mode

🌊

Streaming

💬

System Prompt

🖥️

Code Execution

🔍

Web Search

🔌

MCP Support

Extended Pricing

Input

$3/1M

Output

$15/1M

Cache Read

$0.75/1M

Details

Release Date: July 10, 2025
Knowledge Cutoff: November 1, 2024
Source: API
API Key Required: Yes
License: Proprietary
Model ID: grok-4

Last updated: March 13, 2026