Price Per TokenPrice Per Token
Xai
Xai
vs
Xai
Xai

Grok 4 Fast vs Grok 4.1 Fast

A detailed comparison of pricing, benchmarks, and capabilities

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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

FeatureGrok 4 FastGrok 4.1 Fast
Vision (Image Input)
Tool/Function Calls
Reasoning Mode
Audio Input
Audio Output
PDF Input
Prompt Caching
Web Search

License & Release

PropertyGrok 4 FastGrok 4.1 Fast
LicenseProprietaryProprietary
AuthorXaiXai
ReleasedSep 2025Nov 2025

Grok 4 Fast Modalities

Input
textimage
Output
text

Grok 4.1 Fast Modalities

Input
textimage
Output
text

Frequently Asked Questions

Grok 4 Fast has cheaper input pricing at $0.20/M tokens. Grok 4 Fast has cheaper output pricing at $0.50/M tokens.
Grok 4.1 Fast scores higher on coding benchmarks with a score of 19.5, compared to Grok 4 Fast's score of 19.0.
Grok 4 Fast has a 2,000,000 token context window, while Grok 4.1 Fast has a 2,000,000 token context window.
Grok 4 Fast supports vision. Grok 4.1 Fast supports vision.