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  1. Home
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  3. Compare

Gemini 2.5 Flash Preview 09-2025 vs Grok 4

Compare Gemini 2.5 Flash Preview 09-2025 from Google and Grok 4 from SpaceXAI on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.

Favicon for google
Gemini 2.5 Flash Preview 09-2025
Favicon for x-ai
Grok 4
Favicon for google
Gemini 2.5 Flash Preview 09-2025
Favicon for x-ai
Grok 4

Overview

Gemini 2.5 Flash Preview 09-2025
Author
Google
Grok 4
Author
SpaceXAI
Gemini 2.5 Flash Preview 09-2025
Context length
1.05Mtokens
Grok 4
Context length
256Ktokens
Gemini 2.5 Flash Preview 09-2025
Reasoning
Grok 4
Reasoning
Gemini 2.5 Flash Preview 09-2025
Input modalities
Grok 4
Input modalities
Gemini 2.5 Flash Preview 09-2025
Output modalities
Grok 4
Output modalities

Gemini 2.5 Flash Preview 09-2025 vs Grok 4: side-by-side summary

Gemini 2.5 Flash Preview 09-2025 and Grok 4 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Gemini 2.5 Flash Preview 09-2025, from Google, has a 1,048,576-token context window and is priced by the provider serving it on OpenRouter.

Grok 4, from SpaceXAI, has a 256,000-token context window and is priced by the provider serving it on OpenRouter.

Context window
  • Gemini 2.5 Flash Preview 09-2025: 1,048,576 tokens
  • Grok 4: 256,000 tokens
Price
  • Gemini 2.5 Flash Preview 09-2025: Pricing varies by provider
  • Grok 4: Pricing varies by provider
Provided by
  • Gemini 2.5 Flash Preview 09-2025: Google
  • Grok 4: SpaceXAI
  • model details, providers and pricing
Gemini 2.5 Flash Preview 09-2025
model details, providers and pricing
Grok 4