Gemini 3.5 Flash vs o3
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Frequently Asked Questions: Gemini 3.5 Flash vs o3▼
Which is better, Gemini 3.5 Flash or o3?
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Based on the Capability Index, Gemini 3.5 Flash scores higher (86.2 vs 79.2). 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?
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Gemini 3.5 Flash has a lower blended cost. Gemini 3.5 Flash: $1.50 input / $9.00 output. o3: $2.00 input / $8.00 output.
Which has a larger context window, Gemini 3.5 Flash or o3?
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Gemini 3.5 Flash has a larger context window: Gemini 3.5 Flash supports 1M tokens vs o3 at 200K tokens.
Do both Gemini 3.5 Flash and o3 support vision?
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Yes, both Gemini 3.5 Flash and o3 support vision/image input.
Which has better coding performance, Gemini 3.5 Flash or o3?
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Gemini 3.5 Flash scores higher on SWE-bench Verified: Gemini 3.5 Flash resolves 79% vs o3 at 62%.
What are the key differences between Gemini 3.5 Flash and o3?
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Key differences: Gemini 3.5 Flash has a notably higher capability index (7.0 point gap). 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 for free on idapt.app to see which performs better for your specific needs.