Claude Sonnet 4.5 vs Kimi K2 Instruct 0905
Claude Sonnet 4.5 offers 1.0M tokens context vs 262K tokens, Kimi K2 Instruct 0905 is more cost-effective, Claude Sonnet 4.5 includes advanced reasoning. Compare full specs, pricing, and choose the best model for your use case.
Quick Overview
Claude Sonnet 4.5
OpenRouter
1.0M tokens context • $3.00 / $15.00 per 1M tokens
View full specifications →Kimi K2 Instruct 0905
OpenRouter
262K tokens context • $0.60 / $2.50 per 1M tokens
View full specifications →Detailed Comparison
Specification
Claude Sonnet 4.5
Kimi K2 Instruct 0905
Provider
OpenRouter
OpenRouter
Context Window
1.0M tokens
262K tokens
Max Output Tokens
64K tokens
16K tokens
Input Pricing (per 1M tokens)
$3.00
$0.60
Output Pricing (per 1M tokens)
$15.00
$2.50
Release Date
Sep 2025
Sep 2025
Capabilities
Capability
Claude Sonnet 4.5
Kimi K2 Instruct 0905
Text Generation
Vision
Function Calling
Advanced Reasoning
File Attachments
Which Model Should You Choose?
Choose Claude Sonnet 4.5 if:
- • You need a larger context window
- • You need advanced reasoning
Choose Kimi K2 Instruct 0905 if:
- • Cost efficiency is a priority
- • You prefer open weights