Cracked AI Engineering

Gemini 2.5 Flash vs Grok 4

Gemini 2.5 Flash offers 1.0M tokens context vs 256K tokens, Gemini 2.5 Flash is more cost-effective, Gemini 2.5 Flash supports vision. Compare full specs, pricing, and choose the best model for your use case.

Quick Overview

Gemini 2.5 Flash

FastRouter

1.0M tokens context • $0.30 / $2.50 per 1M tokens

View full specifications →

Grok 4

FastRouter

256K tokens context • $3.00 / $15.00 per 1M tokens

View full specifications →

Detailed Comparison

Specification
Gemini 2.5 Flash
Grok 4
Provider
FastRouter
FastRouter
Context Window
1.0M tokens
256K tokens
Max Output Tokens
66K tokens
64K tokens
Input Pricing (per 1M tokens)
$0.30
$3.00
Output Pricing (per 1M tokens)
$2.50
$15.00
Release Date
Jun 2025
Jul 2025

Capabilities

Capability
Gemini 2.5 Flash
Grok 4
Text Generation
Vision
PDF Processing
Function Calling
Advanced Reasoning
File Attachments

Which Model Should You Choose?

Choose Gemini 2.5 Flash if:

  • • You need a larger context window
  • • Cost efficiency is a priority

Choose Grok 4 if: