GoogleGemini 3.5 FlashVSOpenAIGPT-5.5 Pro
Our Take
Standardized reasoning and coding benchmarks are currently pending verification for one or both of these models. We recommend testing Gemini 3.5 Flash and GPT-5.5 Pro directly in their respective provider playgrounds to see which fits your specific prompt styles best.
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Benchmarks & Scores
Coding (swe-bench-pro)
55.1%complex codebases, multi-file repositories, and architectural planning
Reasoning (gpqa-diamond)
92.2%graduate-level science QA
Cost & Context
Cost (per 1M tokens)20.0x cheaper
$3.38Input: $1.50 | Output: $9.00Context Window
1.05M tokensBenchmarks & Scores
Coding (swe-bench-pro)
N/Acomplex codebases, multi-file repositories, and architectural planning
Reasoning (gpqa-diamond)Winner (+4.0%)
96.2%graduate-level science QA
Cost & Context
Cost (per 1M tokens)
$67.50Input: $30.00 | Output: $180.00Context WindowLarger
1.05M tokensFrequently Asked Questions about Gemini 3.5 Flash vs GPT-5.5 Pro
Gemini 3.5 Flash is cheaper than GPT-5.5 Pro. Gemini 3.5 Flash has a blended cost of $3.38/1M tokens, which is about 20.0x cheaper than GPT-5.5 Pro at $67.50/1M tokens.
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