Gemini 3 Pro vs o3
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Gemini 3 Pro by Google wins on 8 of 16 benchmarks against o3 by OpenAI, which leads on 7. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
General Intelligence: In general intelligence, Gemini 3 Pro scores 1492 on Chatbot Arena ELO compared to o3's 1380, while Gemini 3 Pro scores 89.8% on MMLU-Pro compared to o3's 84.0%, while o3 scores 92.0% on IFEval compared to Gemini 3 Pro's 91.0%.
Coding: In coding, Gemini 3 Pro scores 91.0% on HumanEval+ compared to o3's 90.0%, while o3 scores 69.1% on SWE-bench Verified compared to Gemini 3 Pro's 65.0%, while Gemini 3 Pro scores 72.0% on LiveCodeBench compared to o3's 70.0%.
Math: In math, o3 scores 96.0% on MATH compared to Gemini 3 Pro's 92.0%, while o3 scores 98.5% on GSM8K compared to Gemini 3 Pro's 97.5%, while o3 scores 98.4% on AIME 2025 compared to Gemini 3 Pro's 95.0%.
Reasoning: In reasoning, Gemini 3 Pro scores 91.9% on GPQA Diamond compared to o3's 83.3%, while o3 scores 75.7% 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 o3's 200K.
Pricing Comparison
Gemini 3 Pro costs $2.0/1M input tokens and $12.0/1M output tokens, while o3 costs $2.0/1M input and $8.0/1M output. Both models are priced identically for input tokens.
Speed Comparison
Gemini 3 Pro generates output at 60 tok/s compared to o3's 40 tok/s, and the time to first token is 450 ms for Gemini 3 Pro versus 800 ms for o3. Gemini 3 Pro delivers faster throughput.
Verdict
For developers prioritizing general intelligence and speed, Gemini 3 Pro has the edge. For those who value coding and math, o3 is the stronger choice.
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Gemini 3 Pro vs o3 — FAQ
Which is better, Gemini 3 Pro or o3?
Gemini 3 Pro wins on more benchmarks overall (8 vs 7). However, the best choice depends on your specific needs — each model excels in different areas.
How does Gemini 3 Pro compare to o3 for coding?
o3 is better for coding, scoring 69.1% 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 o3?
Both models are priced the same at $2.0/1M input tokens. Gemini 3 Pro output costs $12.0/1M and o3 output costs $8.0/1M.
Which is faster, Gemini 3 Pro or o3?
Gemini 3 Pro is faster, generating output at 60 tok/s compared to 40 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Gemini 3 Pro vs o3 comparison cover?
This comparison covers 16 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, IFEval, MATH, GPQA Diamond, SWE-bench Verified, Output Speed, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.