o1 vs o3
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
o3 by OpenAI wins on 16 of 18 benchmarks against o1 by OpenAI, which leads on 0. 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, o3 scores 1380 on Chatbot Arena ELO compared to o1's 1360, while o3 scores 84.0% on MMLU-Pro compared to o1's 82.0%, while both score 92.0% on IFEval, while o3 scores 49.4% on SimpleQA compared to o1's 47.0%.
Coding: In coding, o3 scores 90.0% on HumanEval+ compared to o1's 89.0%, while o3 scores 69.1% on SWE-bench Verified compared to o1's 48.9%, while o3 scores 70.0% on LiveCodeBench compared to o1's 55.0%.
Math: In math, o3 scores 96.0% on MATH compared to o1's 94.8%, while o3 scores 98.5% on GSM8K compared to o1's 97.5%, while o3 scores 98.4% on AIME 2025 compared to o1's 74.0%.
Reasoning: In reasoning, o3 scores 83.3% on GPQA Diamond compared to o1's 77.3%, while o3 scores 75.7% on ARC-AGI compared to o1's 32.0%.
Context: In context, both score 200K on Context Length.
Pricing Comparison
o1 costs $15.0/1M input tokens and $60.0/1M output tokens, while o3 costs $2.0/1M input and $8.0/1M output. o3 is the more affordable option for API usage.
Speed Comparison
o1 generates output at 35 tok/s compared to o3's 40 tok/s, and the time to first token is 1000 ms for o1 versus 800 ms for o3. o3 delivers faster throughput.
Verdict
o3 leads across the board in coding, general intelligence, math, affordability, speed, making it the stronger overall choice in this comparison.
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o1 vs o3 — FAQ
Which is better, o1 or o3?
o3 wins on more benchmarks overall (16 vs 0). However, the best choice depends on your specific needs — each model excels in different areas.
How does o1 compare to o3 for coding?
o3 is better for coding, scoring 69.1% on SWE-bench Verified compared to 48.9%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is o1 cheaper than o3?
Yes, o3 is cheaper. o1 costs $15.0/1M input and $60.0/1M output tokens. o3 costs $2.0/1M input and $8.0/1M output tokens.
Which is faster, o1 or o3?
o3 is faster, generating output at 40 tok/s compared to 35 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the o1 vs o3 comparison cover?
This comparison covers 18 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, IFEval, SimpleQA, MATH, GPQA Diamond, SWE-bench Verified, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.