Gemini 3.5 Flash vs GPT 5.5 Pro
Google's high-speed thinking model for agentic workflows, chat, and coding.
OpenAI's high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads.
No captured outputs for these models yet.
Frequently Asked Questions: Gemini 3.5 Flash vs GPT 5.5 Pro▼
Which is better, Gemini 3.5 Flash or GPT 5.5 Pro?
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Based on the Capability Index, GPT 5.5 Pro scores higher (91.8 vs 86.2). 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 GPT 5.5 Pro?
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Gemini 3.5 Flash has a lower blended cost. Gemini 3.5 Flash: $1.50 input / $9.00 output. GPT 5.5 Pro: $30.00 input / $180.00 output.
Which has a larger context window, Gemini 3.5 Flash or GPT 5.5 Pro?
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GPT 5.5 Pro has a larger context window: Gemini 3.5 Flash supports 1M tokens vs GPT 5.5 Pro at 1.1M tokens.
Do both Gemini 3.5 Flash and GPT 5.5 Pro support vision?
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Yes, both Gemini 3.5 Flash and GPT 5.5 Pro support vision/image input.
What are the key differences between Gemini 3.5 Flash and GPT 5.5 Pro?
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Key differences: GPT 5.5 Pro has a notably higher capability index (5.6 point gap); Gemini 3.5 Flash is significantly cheaper. 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 GPT 5.5 Pro for free on idapt.app to see which performs better for your specific needs.