Cracked AI Engineering

o4 Mini vs Kimi K2 Instruct 0905

Kimi K2 Instruct 0905 offers 262K tokens context vs 200K tokens, Kimi K2 Instruct 0905 is more cost-effective, o4 Mini includes advanced reasoning. Compare full specs, pricing, and choose the best model for your use case.

Quick Overview

o4 Mini

OpenRouter

200K tokens context • $1.10 / $4.40 per 1M tokens

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Kimi K2 Instruct 0905

OpenRouter

262K tokens context • $0.60 / $2.50 per 1M tokens

View full specifications →

Detailed Comparison

Specification
o4 Mini
Kimi K2 Instruct 0905
Provider
OpenRouter
OpenRouter
Context Window
200K tokens
262K tokens
Max Output Tokens
100K tokens
16K tokens
Input Pricing (per 1M tokens)
$1.10
$0.60
Output Pricing (per 1M tokens)
$4.40
$2.50
Release Date
Apr 2025
Sep 2025

Capabilities

Capability
o4 Mini
Kimi K2 Instruct 0905
Text Generation
Vision
Function Calling
Advanced Reasoning
File Attachments

Which Model Should You Choose?

Choose o4 Mini if:

  • • You need advanced reasoning

Choose Kimi K2 Instruct 0905 if:

  • • You need a larger context window
  • • Cost efficiency is a priority
  • • You prefer open weights