GPT-5 Pro vs Kimi K2
GPT-5 Pro offers 400K tokens context vs 131K tokens, Kimi K2 is more cost-effective, GPT-5 Pro includes advanced reasoning. Compare full specs, pricing, and choose the best model for your use case.
Quick Overview
Detailed Comparison
Specification
GPT-5 Pro
Kimi K2
Provider
OpenRouter
OpenRouter
Context Window
400K tokens
131K tokens
Max Output Tokens
272K tokens
33K tokens
Input Pricing (per 1M tokens)
$15.00
$0.55
Output Pricing (per 1M tokens)
$120.00
$2.20
Release Date
Oct 2025
Jul 2025
Capabilities
Capability
GPT-5 Pro
Kimi K2
Text Generation
Vision
Function Calling
Advanced Reasoning
File Attachments
Which Model Should You Choose?
Choose GPT-5 Pro if:
- • You need a larger context window
- • You need advanced reasoning
Choose Kimi K2 if:
- • Cost efficiency is a priority
- • You prefer open weights