Grok 4 Fast (Non-Reasoning) vs Kimi K2 Instruct
Grok 4 Fast (Non-Reasoning) offers 2.0M tokens context vs 131K tokens, Grok 4 Fast (Non-Reasoning) is more cost-effective, Grok 4 Fast (Non-Reasoning) supports vision. Compare full specs, pricing, and choose the best model for your use case.
Quick Overview
Grok 4 Fast (Non-Reasoning)
Vercel AI Gateway
2.0M tokens context • $0.20 / $0.50 per 1M tokens
View full specifications →Kimi K2 Instruct
Vercel AI Gateway
131K tokens context • $1.00 / $3.00 per 1M tokens
View full specifications →Detailed Comparison
Specification
Grok 4 Fast (Non-Reasoning)
Kimi K2 Instruct
Provider
Vercel AI Gateway
Vercel AI Gateway
Context Window
2.0M tokens
131K tokens
Max Output Tokens
30K tokens
16K tokens
Input Pricing (per 1M tokens)
$0.20
$1.00
Output Pricing (per 1M tokens)
$0.50
$3.00
Release Date
Sep 2025
Jul 2025
Capabilities
Capability
Grok 4 Fast (Non-Reasoning)
Kimi K2 Instruct
Text Generation
Vision
Function Calling
File Attachments
Which Model Should You Choose?
Choose Grok 4 Fast (Non-Reasoning) if:
- • You need a larger context window
- • Cost efficiency is a priority
Choose Kimi K2 Instruct if:
- • You prefer open weights