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Gemini 3.5 Flash vs GPT 4o

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

OpenAI's original omni model supporting text and image inputs.

63128K ctx$2.50/$10.00 per M#64/92
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
Smarter37%Cheaper23%
Capability
CapabilityECI37%86.2
Reasoning & Knowledge
Graduate Science89%92.8%Expert-Level—Factual Recall68.4%
Math
Math Problems—Competition Math1396%95.6%Research Math11200%39.0%
Coding
Real-World Coding156%79.3%Code Editing—
Agentic
Novel Reasoning72.1%Task Horizon—
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Capability
CapabilityECI63.0
Reasoning & Knowledge
Graduate Science49.2%Expert-Level2.7%Factual Recall—
Math
Math Problems53.3%Competition Math6.4%Research Math0.3%
Coding
Real-World Coding31.0%Code Editing23.1%
Agentic
Novel Reasoning—Task Horizon9min
Specs
1.0M
Context
66K
Max output
May 2026
Released
128K
Context
16K
Max output
May 2024
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input40%$1.50/M tokens
Output10%$9.00/M tokens
Reasoning$9.00/M tokens
Cache read88%$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
Input$2.50/M tokens
Output$10.00/M tokens
Cache read$1.25/M tokens
Chat with Gemini 3.5 FlashGo to model
Chat with GPT 4oGo to model
Frequently Asked Questions: Gemini 3.5 Flash vs GPT 4o▼

Which is better, Gemini 3.5 Flash or GPT 4o?

▼

Based on the Capability Index, Gemini 3.5 Flash scores higher (86.2 vs 63.0). 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 GPT 4o?

▼

Gemini 3.5 Flash has a lower blended cost. Gemini 3.5 Flash: $1.50 input / $9.00 output. GPT 4o: $2.50 input / $10.00 output.

Which has a larger context window, Gemini 3.5 Flash or GPT 4o?

▼

Gemini 3.5 Flash has a larger context window: Gemini 3.5 Flash supports 1M tokens vs GPT 4o at 128K tokens.

Do both Gemini 3.5 Flash and GPT 4o support vision?

▼

Yes, both Gemini 3.5 Flash and GPT 4o support vision/image input.

Which has better coding performance, Gemini 3.5 Flash or GPT 4o?

▼

Gemini 3.5 Flash scores higher on SWE-bench Verified: Gemini 3.5 Flash resolves 79% vs GPT 4o at 31%.

What are the key differences between Gemini 3.5 Flash and GPT 4o?

▼

Key differences: Gemini 3.5 Flash has a notably higher capability index (23.2 point gap); 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 Gemini 3.5 Flash and GPT 4o for free on idapt.app to see which performs better for your specific needs.

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