Gemini 3.5 Flash vs o3-mini (High)
Google's high-speed thinking model for agentic workflows, chat, and coding.
o3-mini with reasoning effort set to high for maximum STEM accuracy.
No captured outputs for these models yet.
Frequently Asked Questions: Gemini 3.5 Flash vs o3-mini (High)▼
Which is better, Gemini 3.5 Flash or o3-mini (High)?
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Based on the Capability Index, Gemini 3.5 Flash scores higher (86.2 vs 73.9). 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 o3-mini (High)?
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o3-mini (High) has a lower blended cost. Gemini 3.5 Flash: $1.50 input / $9.00 output. o3-mini (High): $1.10 input / $4.40 output.
Which has a larger context window, Gemini 3.5 Flash or o3-mini (High)?
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Gemini 3.5 Flash has a larger context window: Gemini 3.5 Flash supports 1M tokens vs o3-mini (High) at 200K tokens.
Do both Gemini 3.5 Flash and o3-mini (High) support vision?
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Gemini 3.5 Flash supports vision/image input, but o3-mini (High) does not.
What are the key differences between Gemini 3.5 Flash and o3-mini (High)?
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Key differences: Gemini 3.5 Flash has a notably higher capability index (12.3 point gap); only Gemini 3.5 Flash supports vision input. Compare full specs on this page.
Which model should I choose for my use case?
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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 o3-mini (High) for free on idapt.app to see which performs better for your specific needs.