Claude Sonnet 4 vs Kimi K2
Claude Sonnet 4 offers 200K tokens context vs 131K tokens, Kimi K2 is more cost-effective, Claude Sonnet 4 includes advanced reasoning. Compare full specs, pricing, and choose the best model for your use case.
Quick Overview
Claude Sonnet 4
FastRouter
200K tokens context • $3.00 / $15.00 per 1M tokens
View full specifications →Detailed Comparison
Specification
Claude Sonnet 4
Kimi K2
Provider
FastRouter
FastRouter
Context Window
200K tokens
131K tokens
Max Output Tokens
64K tokens
33K tokens
Input Pricing (per 1M tokens)
$3.00
$0.55
Output Pricing (per 1M tokens)
$15.00
$2.20
Release Date
May 2025
Jul 2025
Capabilities
Capability
Claude Sonnet 4
Kimi K2
Text Generation
Vision
Function Calling
Advanced Reasoning
File Attachments
Which Model Should You Choose?
Choose Claude Sonnet 4 if:
- • You need a larger context window
- • You need advanced reasoning
Choose Kimi K2 if:
- • Cost efficiency is a priority
- • You prefer open weights