Gemini 3.5 Flash vs GPT 5.1
Google's high-speed thinking model for agentic workflows, chat, and coding.
Frontier-grade model with strong general-purpose reasoning.
No captured outputs for these models yet.
Frequently Asked Questions: Gemini 3.5 Flash vs GPT 5.1▼
Which is better, Gemini 3.5 Flash or GPT 5.1?
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Based on the Capability Index, Gemini 3.5 Flash scores higher (86.2 vs 81.6). 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 GPT 5.1?
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Gemini 3.5 Flash has a lower blended cost. Gemini 3.5 Flash: $1.50 input / $9.00 output. GPT 5.1: $1.25 input / $10.00 output.
Which has a larger context window, Gemini 3.5 Flash or GPT 5.1?
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Gemini 3.5 Flash has a larger context window: Gemini 3.5 Flash supports 1M tokens vs GPT 5.1 at 400K tokens.
Do both Gemini 3.5 Flash and GPT 5.1 support vision?
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Yes, both Gemini 3.5 Flash and GPT 5.1 support vision/image input.
Which has better coding performance, Gemini 3.5 Flash or GPT 5.1?
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Gemini 3.5 Flash scores higher on SWE-bench Verified: Gemini 3.5 Flash resolves 79% vs GPT 5.1 at 68%.
What are the key differences between Gemini 3.5 Flash and GPT 5.1?
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Gemini 3.5 Flash and GPT 5.1 have similar overall capabilities. The main differences lie in pricing, context window size, and provider-specific strengths. Use this comparison page to review all metrics side by side.
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 5.1 for free on idapt.app to see which performs better for your specific needs.