Cracked AI Engineering

GPT-5 Mini vs Kimi K2

GPT-5 Mini offers 400K tokens context vs 131K tokens, GPT-5 Mini includes advanced reasoning, GPT-5 Mini supports vision. Compare full specs, pricing, and choose the best model for your use case.

Quick Overview

GPT-5 Mini

FastRouter

400K tokens context • $0.25 / $2.00 per 1M tokens

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Kimi K2

FastRouter

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

View full specifications →

Detailed Comparison

Specification
GPT-5 Mini
Kimi K2
Provider
FastRouter
FastRouter
Context Window
400K tokens
131K tokens
Max Output Tokens
128K tokens
33K tokens
Input Pricing (per 1M tokens)
$0.25
$0.55
Output Pricing (per 1M tokens)
$2.00
$2.20
Release Date
Aug 2025
Jul 2025

Capabilities

Capability
GPT-5 Mini
Kimi K2
Text Generation
Vision
Function Calling
Advanced Reasoning
File Attachments

Which Model Should You Choose?

Choose GPT-5 Mini if:

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

Choose Kimi K2 if:

  • • You prefer open weights