Grok 3 Fast Latest vs Grok 4 Fast (Non-Reasoning)
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)
xAI
2.0M tokens context • $0.20 / $0.50 per 1M tokens
View full specifications →Detailed Comparison
Specification
Grok 3 Fast Latest
Grok 4 Fast (Non-Reasoning)
Provider
xAI
xAI
Context Window
131K tokens
2.0M tokens
Max Output Tokens
8K tokens
30K tokens
Input Pricing (per 1M tokens)
$5.00
$0.20
Output Pricing (per 1M tokens)
$25.00
$0.50
Release Date
Feb 2025
Sep 2025
Capabilities
Capability
Grok 3 Fast Latest
Grok 4 Fast (Non-Reasoning)
Text Generation
Function Calling
Vision
File Attachments
Which Model Should You Choose?
Choose Grok 3 Fast Latest if:
Choose Grok 4 Fast (Non-Reasoning) if:
- • You need a larger context window
- • Cost efficiency is a priority