Grok 4 Fast vs Kimi K2 Instruct 0905
Grok 4 Fast offers 2.0M tokens context vs 262K tokens, Grok 4 Fast includes advanced reasoning, Grok 4 Fast supports vision. Compare full specs, pricing, and choose the best model for your use case.
Quick Overview
Kimi K2 Instruct 0905
OpenRouter
262K tokens context • $0.60 / $2.50 per 1M tokens
View full specifications →Detailed Comparison
Specification
Grok 4 Fast
Kimi K2 Instruct 0905
Provider
OpenRouter
OpenRouter
Context Window
2.0M tokens
262K tokens
Max Output Tokens
30K tokens
16K tokens
Input Pricing (per 1M tokens)
$0.20
$0.60
Output Pricing (per 1M tokens)
$0.50
$2.50
Release Date
Aug 2025
Sep 2025
Capabilities
Capability
Grok 4 Fast
Kimi K2 Instruct 0905
Text Generation
Vision
Function Calling
Advanced Reasoning
Which Model Should You Choose?
Choose Grok 4 Fast if:
- • You need a larger context window
- • Cost efficiency is a priority
- • You need advanced reasoning
Choose Kimi K2 Instruct 0905 if:
- • You prefer open weights