Cracked AI Engineering

GLM 4.5 Air (free) vs Kimi K2

GLM 4.5 Air (free) is more cost-effective, GLM 4.5 Air (free) includes advanced reasoning. Compare full specs, pricing, and choose the best model for your use case.

Quick Overview

GLM 4.5 Air (free)

OpenRouter

128K tokens context • Free

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Kimi K2

OpenRouter

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

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Detailed Comparison

Specification
GLM 4.5 Air (free)
Kimi K2
Provider
OpenRouter
OpenRouter
Context Window
128K tokens
131K tokens
Max Output Tokens
96K tokens
33K tokens
Input Pricing (per 1M tokens)
Free
$0.55
Output Pricing (per 1M tokens)
Free
$2.20
Release Date
Jul 2025
Jul 2025

Capabilities

Capability
GLM 4.5 Air (free)
Kimi K2
Text Generation
Advanced Reasoning
Function Calling

Which Model Should You Choose?

Choose GLM 4.5 Air (free) if:

  • • Cost efficiency is a priority
  • • You need advanced reasoning

Choose Kimi K2 if:

  • • You need a larger context window