Gemini 3 Pro vs GPT-5.5
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-5.5 by OpenAI wins on 4 of 6 benchmarks against Gemini 3 Pro by Google, which leads on 2. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
Coding: In coding, GPT-5.5 scores 1272 on Design Arena ELO compared to Gemini 3 Pro's 1259, while GPT-5.5 scores 1269 on Website Arena ELO compared to Gemini 3 Pro's 1265.
Reasoning: In reasoning, GPT-5.5 scores 93.8% on GPQA Diamond compared to Gemini 3 Pro's 91.9%.
Context: In context, GPT-5.5 scores 1.1M on Context Length compared to Gemini 3 Pro's 1.0M.
Pricing Comparison
Gemini 3 Pro costs $2.0/1M input tokens and $12.0/1M output tokens, while GPT-5.5 costs $5.0/1M input and $30.0/1M output. Gemini 3 Pro is the more affordable option for API usage.
Verdict
Gemini 3 Pro leads across the board in affordability, making it the stronger overall choice in this comparison.
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Gemini 3 Pro vs GPT-5.5 — FAQ
Which is better, Gemini 3 Pro or GPT-5.5?
GPT-5.5 wins on more benchmarks overall (4 vs 2). However, the best choice depends on your specific needs — each model excels in different areas.
How does Gemini 3 Pro compare to GPT-5.5 for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is Gemini 3 Pro cheaper than GPT-5.5?
Yes, Gemini 3 Pro is cheaper. Gemini 3 Pro costs $2.0/1M input and $12.0/1M output tokens. GPT-5.5 costs $5.0/1M input and $30.0/1M output tokens.
Which is faster, Gemini 3 Pro or GPT-5.5?
Output speed data is not available for both models. Check the speed section of the comparison above for available performance data.
What benchmarks does the Gemini 3 Pro vs GPT-5.5 comparison cover?
This comparison covers 6 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length, Design Arena ELO, Website Arena ELO. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.