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Grok Code Fast 1 vs Gemini 3.5 Flash

At a glance

Speedy reasoning model built for agentic coding.

256K ctx

Google's high-speed thinking model for agentic workflows, chat, and coding.

861.0M ctx$1.50/$9.00 per M#11/92
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
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch AI· as of 2026-07-10
Capability
Capability—
Reasoning & Knowledge
Graduate Science—Factual Recall—
Math
Competition Math—Research Math—
Coding
Real-World Coding—
Agentic
Terminal Tasks25.8%Novel Reasoning—
Reasoning
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Capability
CapabilityECI86.2
Reasoning & Knowledge
Graduate Science92.8%Factual Recall68.4%
Math
Competition Math95.6%Research Math39.0%
Coding
Real-World Coding79.3%
Agentic
Terminal Tasks—Novel Reasoning72.1%
Specs
256K
Context
33K
Max output
—
Released
1.0M
Context
66K
Max output
May 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Pricing not available
Live pricing, shown before you run
Input$1.50/M tokens
Output$9.00/M tokens
Reasoning$9.00/M tokens
Cache read$0.15/M tokens
Cache write$0.08/M tokens
Image input$1.50/M tokens
Audio input$3.00/M tokens
Web search$0.01/search
Chat with Grok Code Fast 1Go to model
Chat with Gemini 3.5 FlashGo to model
Frequently Asked Questions: Grok Code Fast 1 vs Gemini 3.5 Flash▼

Which is better, Grok Code Fast 1 or Gemini 3.5 Flash?

▼

Both Grok Code Fast 1 and Gemini 3.5 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 Code Fast 1 or Gemini 3.5 Flash?

▼

Gemini 3.5 Flash has a larger context window: Grok Code Fast 1 supports 256K tokens vs Gemini 3.5 Flash at 1M tokens.

Do both Grok Code Fast 1 and Gemini 3.5 Flash support vision?

▼

Gemini 3.5 Flash supports vision/image input, but Grok Code Fast 1 does not.

What are the key differences between Grok Code Fast 1 and Gemini 3.5 Flash?

▼

Key differences: only Gemini 3.5 Flash supports vision input; only Gemini 3.5 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 Code Fast 1 and Gemini 3.5 Flash for free on idapt.app to see which performs better for your specific needs.

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