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Gemini 3.5 Flash vs o4-mini (High)

At a glance

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

861.0M ctx$1.50/$9.00 per M#11/92

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

79200K ctx$1.10/$4.40 per M#30/92
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
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—
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
Specs
1.0M
Context
66K
Max output
May 2026
Released
200K
Context
100K
Max output
Apr 2025
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
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
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
Chat with Gemini 3.5 FlashGo to model
Chat with o4-mini (High)Go to model
Frequently Asked Questions: Gemini 3.5 Flash vs o4-mini (High)▼

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

▼

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

▼

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

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

▼

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

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

▼

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

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

▼

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 Gemini 3.5 Flash and o4-mini (High) for free on idapt.app to see which performs better for your specific needs.

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