Key Takeaways
Grok 4 Fast wins:
- Faster response time
- Better at math
Grok 4.1 Fast wins:
- Higher intelligence benchmark
- Better at coding
Price Advantage
Grok 4 Fast
Benchmark Advantage
Grok 4.1 Fast
Context Window
Grok 4.1 Fast
Speed
Grok 4 Fast
Pricing Comparison
Benchmark Comparison
Context & Performance
Capabilities
Feature Comparison
| Feature | Grok 4 Fast | Grok 4.1 Fast |
|---|---|---|
Vision (Image Input) | ||
Tool/Function Calls | ||
Reasoning Mode | ||
Audio Input | ||
Audio Output | ||
PDF Input | ||
Prompt Caching | ||
Web Search |
License & Release
| Property | Grok 4 Fast | Grok 4.1 Fast |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | Xai | Xai |
| Released | Sep 2025 | Nov 2025 |
Grok 4 Fast Modalities
Input
textimage
Output
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Grok 4.1 Fast Modalities
Input
textimage
Output
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