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Gemini 2.5 Flash Preview 09-2025 vs Grok 4

A detailed comparison of pricing, benchmarks, and capabilities

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Key Takeaways

Gemini 2.5 Flash Preview 09-2025 wins:

  • Cheaper input tokens
  • Cheaper output tokens
  • Larger context window

Grok 4 wins:

  • Faster response time
  • Higher intelligence benchmark
  • Better at coding
  • Better at math
Price Advantage
Gemini 2.5 Flash Preview 09-2025
Benchmark Advantage
Grok 4
Context Window
Gemini 2.5 Flash Preview 09-2025
Speed
Grok 4

Pricing Comparison

Benchmark Comparison

Context & Performance

Capabilities

Feature Comparison

FeatureGemini 2.5 Flash Preview 09-2025Grok 4
Vision (Image Input)
Tool/Function Calls
Reasoning Mode
Audio Input
Audio Output
PDF Input
Prompt Caching
Web Search

License & Release

PropertyGemini 2.5 Flash Preview 09-2025Grok 4
LicenseProprietaryProprietary
AuthorGoogleXai
ReleasedUnknownJul 2025

Gemini 2.5 Flash Preview 09-2025 Modalities

Input
textimageaudiovideo
Output
text

Grok 4 Modalities

Input
imagetext
Output
text

Frequently Asked Questions

Gemini 2.5 Flash Preview 09-2025 has cheaper input pricing at $0.30/M tokens. Gemini 2.5 Flash Preview 09-2025 has cheaper output pricing at $2.50/M tokens.
Grok 4 scores higher on coding benchmarks with a score of 40.5, compared to Gemini 2.5 Flash Preview 09-2025's score of 22.1.
Gemini 2.5 Flash Preview 09-2025 has a 1,048,576 token context window, while Grok 4 has a 256,000 token context window.
Gemini 2.5 Flash Preview 09-2025 supports vision. Grok 4 supports vision.