Claude Opus 4.1 vs Kimi K2 Instruct 0905
Kimi K2 Instruct 0905 offers 262K tokens context vs 200K tokens, Kimi K2 Instruct 0905 is more cost-effective, Claude Opus 4.1 includes advanced reasoning. Compare full specs, pricing, and choose the best model for your use case.
Quick Overview
Claude Opus 4.1
OpenRouter
200K tokens context • $15.00 / $75.00 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 Opus 4.1
Kimi K2 Instruct 0905
Provider
OpenRouter
OpenRouter
Context Window
200K tokens
262K tokens
Max Output Tokens
32K tokens
16K tokens
Input Pricing (per 1M tokens)
$15.00
$0.60
Output Pricing (per 1M tokens)
$75.00
$2.50
Release Date
Aug 2025
Sep 2025
Capabilities
Capability
Claude Opus 4.1
Kimi K2 Instruct 0905
Text Generation
Vision
Function Calling
Advanced Reasoning
File Attachments
Which Model Should You Choose?
Choose Claude Opus 4.1 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