Gemini 3.1 Pro vs o3 Pro
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Gemini 3.1 Pro by Google wins on 11 of 15 benchmarks against o3 Pro by OpenAI, which leads on 3. 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 3.1 Pro scores 1501 on Chatbot Arena ELO compared to o3 Pro's 1410, while Gemini 3.1 Pro scores 92.6% on MMLU-Pro compared to o3 Pro's 86.0%.
Coding: In coding, Gemini 3.1 Pro scores 93.0% on HumanEval+ compared to o3 Pro's 92.0%, while Gemini 3.1 Pro scores 80.6% on SWE-bench Verified compared to o3 Pro's 70.0%, while both score 75.0% on LiveCodeBench.
Math: In math, o3 Pro scores 97.0% on MATH compared to Gemini 3.1 Pro's 93.0%, while o3 Pro scores 99.0% on GSM8K compared to Gemini 3.1 Pro's 98.0%, while o3 Pro scores 98.4% on AIME 2025 compared to Gemini 3.1 Pro's 95.0%.
Reasoning: In reasoning, Gemini 3.1 Pro scores 94.1% on GPQA Diamond compared to o3 Pro's 85.0%, while Gemini 3.1 Pro scores 77.1% on ARC-AGI compared to o3 Pro's 70.0%.
Context: In context, Gemini 3.1 Pro scores 1.0M on Context Length compared to o3 Pro's 200K.
Pricing Comparison
Gemini 3.1 Pro costs $2.0/1M input tokens and $12.0/1M output tokens, while o3 Pro costs $20.0/1M input and $80.0/1M output. Gemini 3.1 Pro is the more affordable option for API usage.
Speed Comparison
Gemini 3.1 Pro generates output at 65 tok/s compared to o3 Pro's 25 tok/s, and the time to first token is 420 ms for Gemini 3.1 Pro versus 1200 ms for o3 Pro. Gemini 3.1 Pro delivers faster throughput.
Verdict
For developers prioritizing coding and general intelligence and affordability and speed, Gemini 3.1 Pro has the edge. For those who value math, o3 Pro is the stronger choice.
View Individual Model Pages
Gemini 3.1 Pro vs o3 Pro — FAQ
Which is better, Gemini 3.1 Pro or o3 Pro?
Gemini 3.1 Pro wins on more benchmarks overall (11 vs 3). However, the best choice depends on your specific needs — each model excels in different areas.
How does Gemini 3.1 Pro compare to o3 Pro for coding?
Gemini 3.1 Pro is better for coding, scoring 80.6% on SWE-bench Verified compared to 70.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Gemini 3.1 Pro cheaper than o3 Pro?
Yes, Gemini 3.1 Pro is cheaper. Gemini 3.1 Pro costs $2.0/1M input and $12.0/1M output tokens. o3 Pro costs $20.0/1M input and $80.0/1M output tokens.
Which is faster, Gemini 3.1 Pro or o3 Pro?
Gemini 3.1 Pro is faster, generating output at 65 tok/s compared to 25 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Gemini 3.1 Pro vs o3 Pro comparison cover?
This comparison covers 15 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, MATH, SWE-bench Verified, GPQA Diamond, Output Speed, Time to First Token, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.