Gemini 3 Pro vs GPT-5.2
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-5.2 by OpenAI wins on 12 of 16 benchmarks against Gemini 3 Pro by Google, which leads on 4. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from the AI Value Index.
Category-by-Category Breakdown
General Intelligence: In general intelligence, Gemini 3 Pro scores 1492 on Chatbot Arena ELO compared to GPT-5.2's 1475, while Gemini 3 Pro scores 89.8% on MMLU-Pro compared to GPT-5.2's 83.0%, while GPT-5.2 scores 95.0% on IFEval compared to Gemini 3 Pro's 91.0%.
Coding: In coding, GPT-5.2 scores 95.0% on HumanEval+ compared to Gemini 3 Pro's 91.0%, while GPT-5.2 scores 80.0% on SWE-bench Verified compared to Gemini 3 Pro's 65.0%, while GPT-5.2 scores 80.0% on LiveCodeBench compared to Gemini 3 Pro's 72.0%.
Math: In math, GPT-5.2 scores 97.0% on MATH compared to Gemini 3 Pro's 92.0%, while GPT-5.2 scores 99.0% on GSM8K compared to Gemini 3 Pro's 97.5%, while GPT-5.2 scores 100.0% on AIME 2025 compared to Gemini 3 Pro's 95.0%.
Reasoning: In reasoning, GPT-5.2 scores 92.4% on GPQA Diamond compared to Gemini 3 Pro's 91.9%, while GPT-5.2 scores 54.2% on ARC-AGI compared to Gemini 3 Pro's 54.0%.
Context: In context, Gemini 3 Pro scores 1.0M on Context Length compared to GPT-5.2's 400K.
Pricing Comparison
Gemini 3 Pro costs $2.0/1M input tokens and $12.0/1M output tokens, while GPT-5.2 costs $1.8/1M input and $14.0/1M output. GPT-5.2 is the more affordable option for API usage.
Speed Comparison
Gemini 3 Pro generates output at 60 tok/s compared to GPT-5.2's 90 tok/s, and the time to first token is 450 ms for Gemini 3 Pro versus 380 ms for GPT-5.2. GPT-5.2 delivers faster throughput.
Verdict
For developers prioritizing general intelligence, Gemini 3 Pro has the edge. For those who value coding and math and affordability and speed, GPT-5.2 is the stronger choice.
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Gemini 3 Pro vs GPT-5.2 — FAQ
Which is better, Gemini 3 Pro or GPT-5.2?
GPT-5.2 wins on more benchmarks overall (12 vs 4). However, the best choice depends on your specific needs — each model excels in different areas.
How does Gemini 3 Pro compare to GPT-5.2 for coding?
GPT-5.2 is better for coding, scoring 80.0% on SWE-bench Verified compared to 65.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Gemini 3 Pro cheaper than GPT-5.2?
Yes, GPT-5.2 is cheaper. Gemini 3 Pro costs $2.0/1M input and $12.0/1M output tokens. GPT-5.2 costs $1.8/1M input and $14.0/1M output tokens.
Which is faster, Gemini 3 Pro or GPT-5.2?
GPT-5.2 is faster, generating output at 90 tok/s compared to 60 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Gemini 3 Pro vs GPT-5.2 comparison cover?
This comparison covers 16 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, IFEval, MATH, SWE-bench Verified, GPQA Diamond, Output Speed, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.