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o4-mini (High) vs Gemini 3.5 Flash

At a glance

o4-mini with reasoning effort locked to high for maximum accuracy.

79200K ctx$1.10/$4.40 per M#30/92

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

861.0M ctx$1.50/$9.00 per M#11/92
Agent Demos
All agent demos

No shared agent demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Cheaper43%
Capability
CapabilityECI78.6
Reasoning & Knowledge
Graduate Science79.6%Expert-Level18.1%Factual Recall23.9%
Math
Math Problems97.8%Competition Math81.7%Research Math24.8%
Coding
Real-World Coding—Code Editing72.0%
Agentic
Novel Reasoning6.1%Task Horizon1.3h
Reasoning
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Smarter10%
Capability
CapabilityECI10%86.2
Reasoning & Knowledge
Graduate Science17%92.8%Expert-Level—Factual Recall186%68.4%
Math
Math Problems—Competition Math17%95.6%Research Math57%39.0%
Coding
Real-World Coding79.3%Code Editing—
Agentic
Novel Reasoning1080%72.1%Task Horizon—
Specs
200K
Context
100K
Max output
Apr 2025
Released
1.0M
Context
66K
Max output
May 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input27%$1.10/M tokens
Output51%$4.40/M tokens
Cache read$0.28/M tokens
Web search29%$0.01/search
Live pricing, shown before you run
Input$1.50/M tokens
Output$9.00/M tokens
Reasoning$9.00/M tokens
Cache read45%$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 o4-mini (High)Go to model
Chat with Gemini 3.5 FlashGo to model
Frequently Asked Questions: o4-mini (High) vs Gemini 3.5 Flash▼

Which is better, o4-mini (High) or Gemini 3.5 Flash?

▼

Based on the Capability Index, Gemini 3.5 Flash scores higher (86.2 vs 78.6). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.

Which is cheaper, o4-mini (High) or Gemini 3.5 Flash?

▼

o4-mini (High) has a lower blended cost. o4-mini (High): $1.10 input / $4.40 output. Gemini 3.5 Flash: $1.50 input / $9.00 output.

Which has a larger context window, o4-mini (High) or Gemini 3.5 Flash?

▼

Gemini 3.5 Flash has a larger context window: o4-mini (High) supports 200K tokens vs Gemini 3.5 Flash at 1M tokens.

Do both o4-mini (High) and Gemini 3.5 Flash support vision?

▼

Yes, both o4-mini (High) and Gemini 3.5 Flash support vision/image input.

What are the key differences between o4-mini (High) and Gemini 3.5 Flash?

▼

Key differences: Gemini 3.5 Flash has a notably higher capability index (7.6 point gap). 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 o4-mini (High) and Gemini 3.5 Flash for free on idapt.app to see which performs better for your specific needs.

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