Cracked AI Engineering

Grok Code Fast 1 vs Kimi K2

Grok Code Fast 1 offers 256K tokens context vs 131K tokens, Grok Code Fast 1 includes advanced reasoning, Kimi K2 has open weights. Compare full specs, pricing, and choose the best model for your use case.

Quick Overview

Grok Code Fast 1

OpenRouter

256K tokens context • $0.20 / $1.50 per 1M tokens

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Kimi K2

OpenRouter

131K tokens context • $0.55 / $2.20 per 1M tokens

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Detailed Comparison

Specification
Grok Code Fast 1
Kimi K2
Provider
OpenRouter
OpenRouter
Context Window
256K tokens
131K tokens
Max Output Tokens
10K tokens
33K tokens
Input Pricing (per 1M tokens)
$0.20
$0.55
Output Pricing (per 1M tokens)
$1.50
$2.20
Release Date
Aug 2025
Jul 2025

Capabilities

Capability
Grok Code Fast 1
Kimi K2
Text Generation
Function Calling
Advanced Reasoning

Which Model Should You Choose?

Choose Grok Code Fast 1 if:

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

Choose Kimi K2 if:

  • • You prefer open weights