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Grok 4 vs Gemini 3.8 Flash

At a glance

xAI's flagship reasoning model with parallel tool calling.

256K ctx

Google's most intelligent Flash model, with significant gains over 3.7 Flash across software engineering, agentic tasks, and multi-step reasoning.

1.0M ctx$0.75/$3.75 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
No benchmarks available

This model hasn't been benchmarked yet.

Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Specs
256K
Context
33K
Max output
—
Released
1.0M
Context
66K
Max output
Sep 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Pricing not available
Live pricing, shown before you run
Input$0.75/M tokens
Output$3.75/M tokens
Reasoning$3.75/M tokens
Cache read$0.07/M tokens
Cache write$0.04/M tokens
Image input$0.75/M tokens
Audio input$0.75/M tokens
Web search$0.01/search
Chat with Grok 4Go to model
Chat with Gemini 3.8 FlashGo to model
Frequently Asked Questions: Grok 4 vs Gemini 3.8 Flash▼

Which is better, Grok 4 or Gemini 3.8 Flash?

▼

Both Grok 4 and Gemini 3.8 Flash are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which has a larger context window, Grok 4 or Gemini 3.8 Flash?

▼

Gemini 3.8 Flash has a larger context window: Grok 4 supports 256K tokens vs Gemini 3.8 Flash at 1M tokens.

Do both Grok 4 and Gemini 3.8 Flash support vision?

▼

Yes, both Grok 4 and Gemini 3.8 Flash support vision/image input.

What are the key differences between Grok 4 and Gemini 3.8 Flash?

▼

Key differences: only Gemini 3.8 Flash offers extended reasoning mode. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Grok 4 and Gemini 3.8 Flash for free on idapt.app to see which performs better for your specific needs.

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