o3-pro
o3-pro (OpenAI) was released on Jun 10, 2025. In the Epoch AI capability ranking (ECI), it ranks #69 out of 267 models, with 147.37. Against models of the same generation, its best result is on Dtbench: 86.9%, #2 of 46.
Where o3-pro stands out and where it falls behind, by the numbers
o3-pro has published results on 8 tests compiled by Epoch AI. The yardstick here is its generation: its position among the models released between Sep 13, 2024 and Sep 8, 2025 that took the same test. Against the whole archive, which includes 2023 models, a recent release lands near the top of almost everything, and that says nothing.
Where it stands out
Tests where it sits in the top third of its own generation.
Where it falls behind
Tests where it sits in the bottom half of its own generation.
It is not in the bottom half of its generation on any test with 6 or more models compared.
See all 8 tests, one by one
| Test | Score | In its generation | Overall | Test record |
|---|---|---|---|---|
| Dtbench | 86.9% | #2 / 46 | #53 / 148 | 98.9% Claude Opus 5.5 |
| Lmca | 38.48 | #3 / 36 | #51 / 121 | 68.23 Claude Opus 5.5 |
| WeirdML | 58.2% | #2 / 37 | #34 / 112 | 93.6% GPT-6 Astra |
| ARC-AGI 2 | 4.9% | #7 / 25 (tied with 1) | #57 / 83 | 95.0% GPT-6 Astra |
| ARC-AGI | 59.3% | #4 / 24 | #52 / 81 | 98.5% Claude Fable 5 |
| Aider Polyglot | 84.90 | #2 / 31 | #2 / 38 | 88.00 GPT-5 |
| Creative writing (Lech Mazur) | 8.44 | #3 / 33 | #4 / 38 | 8.60 GPT-5 |
| Fiction.liveBench | 88.9% | #5 / 28 | #5 / 31 | 100.0% o3 |
For each test, the model's best effort level counts, as in the ranking. Source of the scores: Epoch AI, under CC BY 4.0.
What to compare o3-pro with
The models from other labs closest in capability and released in the same period, at most two per lab. Click any of them to see its page.
| Model | Lab | ECI | ELO | LiveBench | Release |
|---|---|---|---|---|---|
| Kimi K2.5 | Moonshot | 147.98 | 1,495 | n/a | Jan 27, 2026 |
| o3-pro | OpenAI | 147.37 | n/a | n/a | Jun 10, 2025 |
| Claude Sonnet 4.5 | Anthropic | 146.83 | 1,488 | n/a | Sep 29, 2025 |
| MiniMax-M2.5 | MiniMax | 146.67 | 1,393 | n/a | Feb 12, 2026 |
| Qwen3.5 397B-A17B | Alibaba | 146.66 | 1,499 | n/a | Feb 13, 2026 |
| Grok 4 | xAI | 146.43 | n/a | n/a | Jul 9, 2025 |
| Qwen 3.5 Plus (hosted 397B-A17B) | Alibaba | 146.32 | n/a | n/a | Feb 16, 2026 |
o3-pro or Claude Sonnet 4.5?
Claude Sonnet 4.5 is the model from another lab closest to o3-pro in capability. Across the 5 tests both took, this is the score:
| Test | o3-pro | Claude Sonnet 4.5 |
|---|---|---|
| ARC-AGI 2 | 4.9% | 13.6% |
| WeirdML | 58.2% | 47.7% |
| ARC-AGI | 59.3% | 63.7% |
| Dtbench | 86.9% | 83.2% |
| Lmca | 38.48 | 38.76 |
Unweighted score: each test counts one point, whether math or coding. The dot marks who did better on each row.
What o3-pro costs to deliver each task
Price per token is what is on the price sheet; cost per task is what lands on the invoice, because it depends on how many tokens the model spends. Each point is an effort level, published by whoever ran the test and compiled by Epoch AI. The further up and to the left, the more score per dollar.
ARC-AGI 2
The score scale does not start at zero.
ARC-AGI
The score scale does not start at zero.
Other models from OpenAI
The models from the same lab closest in time, newest first.
| Model | Release | ECI | ELO | LiveBench | Access |
|---|---|---|---|---|---|
| GPT-5 | Aug 7, 2025 | 150.00 | 1,436 | n/a | API access |
| gpt-oss-120b | Aug 5, 2025 | 140.00 | 1,385 | n/a | Open weights (unrestricted) |
| gpt-oss-20b | Aug 5, 2025 | 137.81 | 1,315 | n/a | Open weights (unrestricted) |
| o3-pro | Jun 10, 2025 | 147.37 | n/a | n/a | API access |
| o3 | Apr 16, 2025 | 146.87 | n/a | n/a | API access |
| o4-mini | Apr 16, 2025 | 145.60 | n/a | n/a | API access |
| GPT-4.1 | Apr 14, 2025 | 136.77 | n/a | n/a | API access |
| GPT-4.1 mini | Apr 14, 2025 | 135.00 | n/a | n/a | API access |
| GPT-4.1 nano | Apr 14, 2025 | 129.63 | n/a | n/a | API access |
Have you used o3-pro? Rate it
Users' opinion, not measurement: the rating is kept apart from the ranking and does not move anyone's position. One vote per browser, no sign-up, and you can change your rating later.
What people ask about o3-pro
Where does o3-pro rank among AI models?
In the ROO3 AI Benchmark, ordered by the Epoch AI ECI, o3-pro ranks #69 out of 267 models, with an ECI of 147.37. The ECI is a composite index that combines several hard benchmarks into a single scale. The position changes when a new model comes out, and the page is refreshed six times a day.
Is o3-pro better than Claude Sonnet 4.5?
Across the 5 tests both models took and Epoch AI compiled, o3-pro comes out ahead on 2, behind on 3 and tied on 0. It is a test-by-test count with no weighting: a win in math counts the same as a win in coding. To choose between the two, look at the tests that resemble your own use.
What is o3-pro best at?
Against models of the same generation (released up to 9 months before and up to 3 months after it), the best relative results of o3-pro are: Dtbench (#2 of 46); WeirdML (#2 of 37); Aider Polyglot (#2 of 31). The yardstick is its position among the models of that period that took the same test.
Where do the numbers on this page come from?
From the same three sources as the ranking, all openly licensed: Epoch AI (ECI and individual tests, CC BY 4.0), Arena (human-preference ELO, CC BY 4.0) and LiveBench (overall average, CC BY-SA 4.0). ROO3 does not measure any model. When the page shows a figure published by the maker itself, it appears in the written analysis, labeled as the maker's, and never enters the ranking.
Where each number comes from
Epoch AI, "AI Benchmarking Hub". Published at epoch.ai. Data under the CC BY 4.0 licence, reordered by roo3.co.
The Arena (LMArena) leaderboard, from the public lmarena-ai/leaderboard-dataset on Hugging Face, under the CC BY 4.0 licence. We are not affiliated with the Arena.
LiveBench, by the LiveBench team, published at livebench.ai under the CC BY-SA 4.0 license. The overall average is recomputed by roo3.co with the same formula as the website (average of the categories), and those numbers stay under CC BY-SA 4.0. We are not affiliated with LiveBench.
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