Grok API Pricing October 2025: Complete Guide to Models, Features, and Costs

October 2025

xAI’s Grok API continues to evolve with new models and pricing structures designed to meet diverse developer needs. This comprehensive guide covers everything you need to know about Grok API pricing as of October 2025.

🚀 New Model Releases

Grok 4 Fast Series

xAI has introduced two new cost-efficient reasoning models:

grok-4-fast-reasoning

• Capabilities: Advanced reasoning with lightning-fast performance
• Context Window: 2,000,000 tokens
• Pricing: $0.20 per million input tokens · $0.50 per million output tokens
• Rate Limits: 4M tokens per minute · 480 requests per minute

grok-4-fast-non-reasoning

• Capabilities: Cost-optimized non-reasoning variant
• Context Window: 2,000,000 tokens
• Pricing: $0.20 per million input tokens · $0.50 per million output tokens
• Rate Limits: 4M tokens per minute · 480 requests per minute

Specialized Coding Model

grok-code-fast-1

• Description: Lightning-fast reasoning model built for agentic coding
• Context Window: 256,000 tokens
• Pricing: $0.20 per million input tokens · $1.50 per million output tokens
• Rate Limits: 2M tokens per minute · 480 requests per minute

📊 Complete Model Pricing Table

Language Models

Image Generation Models

grok-2-image-1212

• Pricing: $0.07 per image
• Rate Limit: 300 images per minute

🔍 Search Features Pricing

Live Search

• Cost: $25 per 1,000 sources requested
• Billing: Each source used (Web, X, News, RSS) counts as one request
• Examples:
  • 1 source: $0.025
  • 4 sources: $0.10
• Tracking: Check response.usage.num_sources_used in API response

Documents Search

• Documents Search: $2.50 per 1,000 requests
• File Storage: Free
• Collections Storage: Free

⚡ Grok 4 Important Updates

Key Differences from Grok 3

• Reasoning Model Only: Grok 4 operates exclusively as a reasoning model with no non-reasoning mode
• Unsupported Parameters: presencePenalty, frequencyPenalty, and stop parameters are not supported
• No Reasoning Effort: The reasoning_effort parameter is not available in Grok 4

Knowledge Cut-off

• Grok 3 & Grok 4: Both models have knowledge up to November 2024
• Realtime Information: Requires Live Search integration for current events

💡 Model Capabilities & Features

Input/Output Modalities

• Text-to-Text (T→T): All current models support text input and output
• Image Input: Supported by vision models with specific limitations
• Mixed Input: Text and image inputs can be combined in any order

Image Input Specifications

• Maximum Image Size: 20MiB
• Maximum Number of Images: No limit
• Supported Formats: JPG/JPEG or PNG
• Flexible Input Order: Text prompts can precede or follow image inputs

Context Window Management

• Variable Sizes: Ranging from 32,768 to 2,000,000 tokens depending on model
• Cached Prompt Tokens: Automatic caching reduces costs for repeated prompts
• Usage Tracking: Monitor cached token consumption in the “usage” object

🎯 Best Practices for Cost Optimization

1. Use Cached Prompts: Enable automatic caching for repeated requests
2. Choose Appropriate Model: Select based on task complexity and budget
3. Monitor Source Usage: Track Live Search sources to control costs
4. Leverage Context Windows: Use larger context models for complex conversations
5. Consider Grok 4 Fast: New models offer significant cost savings for reasoning tasks

📈 Pricing Summary

The October 2025 pricing introduces significant improvements in cost-efficiency, particularly with the new Grok 4 Fast series offering reasoning capabilities at substantially lower prices compared to previous generations.

For the most up-to-date pricing and detailed specifications, always check the official xAI Console and API documentation.

Note: All prices are subject to change. Please refer to official xAI documentation for the most current pricing information.