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GoogleGemini 3.5 Flash LiteVSOpenAIGPT-5.5 Pro

Analysis by:the whichllmmodel Editorial Team|Updated: June 2026

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 Lite and GPT-5.5 Pro directly in their respective provider playgrounds to see which fits your specific prompt styles best.
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Model Specs

Gemini 3.5 Flash Lite

Benchmarks & Scores

Coding (swe-bench-pro)
54.2%

excellent at multi-file repositories, autonomous agents, and industrial codebases

Reasoning (gpqa-diamond)
84%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)79.4x cheaper
$0.85Input: $0.30 | Output: $2.50
Context Window
1.05M tokens
Model Specs

GPT-5.5 Pro

Benchmarks & Scores

Coding (swe-bench-pro)
N/A

excellent at multi-file repositories, autonomous agents, and industrial codebases

Reasoning (gpqa-diamond)Winner (+12.2%)
96.2%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)
$67.50Input: $30.00 | Output: $180.00
Context WindowLarger
1.05M tokens

Frequently Asked Questions about Gemini 3.5 Flash Lite vs GPT-5.5 Pro

Gemini 3.5 Flash Lite is cheaper than GPT-5.5 Pro. Gemini 3.5 Flash Lite has a blended cost of $0.85/1M tokens, which is about 79.4x cheaper than GPT-5.5 Pro at $67.50/1M tokens.

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