# O1 Pro

> Source: Benchize (https://benchize.com) — https://benchize.com/models/o1-pro. When citing or reusing this content, credit "Benchize" and link to https://benchize.com/models/o1-pro.

OpenAI

Canonical URL: https://benchize.com/models/o1-pro
Last updated: Thu, 22 Oct 2026 07:32:33 GMT

Reproduction and quotation must name Benchize, link to the canonical HTML URL, and retain individual source citations.

OpenAI

## Benchmarks

| Benchmark | Score | ± | Rank |  |
| --- | --- | --- | --- | --- |
| [MASK](https://benchize.com/benchmarks/scale%3Amask.md) | 61.6source score | CI 60.74–62.46 | 9 / 25 |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 61.6 \| source_score \| reported \| Higher is better \| ### Configuration Reasoning effort unknown Model configuration o1-Pro sourceModelVersion o1-pro thinkingEnabled Not reported ### Reported statistics Uncertainty Confidence interval: 60.74–62.46 contaminationWarning Not reported rank 33 reportedConfidenceHalfWidth 0.86 ### Source [Original source](https://labs.scale.com/leaderboard/mask) Source scale Original model label o1-Pro Observed 2026-10-22T03:30:12.706Z Evidence SHA-256 `fe1699303dff9a092aff10128cfc39d63ddc0680c0d241345fa747c450597b67` Source locator `/rows/32` |  |  |  |  |
| [Humanity's Last Exam (Text Only)](https://benchize.com/benchmarks/scale%3Ahumanitys_last_exam_text_only.md) | 7.71source score | CI 6.58–8.84 | 18 / 25 |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 7.71 \| source_score \| reported \| Higher is better \| ### Configuration Reasoning effort unknown Model configuration o1 Pro sourceModelVersion Not reported thinkingEnabled Not reported ### Reported statistics Uncertainty Confidence interval: 6.58–8.84 contaminationWarning 9% (196 prompts) failed due to a post-training bug and were counted as failures. OpenAI has been informed and is working on a fix. --- Potential contamination warning: This model was evaluated after the public release of HLE, allowing model builder access to the prompts and solutions. rank 46 reportedConfidenceHalfWidth 1.13 ### Source [Original source](https://labs.scale.com/leaderboard/humanitys_last_exam_text_only) Source scale Original model label o1 Pro Observed 2026-10-22T03:30:09.372Z Evidence SHA-256 `16bd91dbd41a73afd31ff09fba3b9b08e9e3e2cfe682c50cc3b2bf8397610af6` Source locator `/rows/45` |  |  |  |  |
| [Humanity’s Last Exam (HLE)](https://benchize.com/benchmarks/hle.md) | 8.12source score | CI 7.05–9.19 | 9 / 17 |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 8.12 \| source_score \| reported \| Higher is better \| ### Configuration Reasoning effort unknown Model configuration o1 Pro sourceModelVersion Not reported thinkingEnabled Not reported ### Reported statistics Uncertainty Confidence interval: 7.05–9.19 contaminationWarning 9% (216 prompts) failed due to a post-training bug and were counted as failures. OpenAI has been informed and is working on a fix. --- Potential contamination warning: This model was evaluated after the public release of HLE, allowing model builder access to the prompts and solutions. rank 37 reportedConfidenceHalfWidth 1.07 ### Source [Original source](https://labs.scale.com/leaderboard/humanitys_last_exam) Source scale Original model label o1 Pro Observed 2026-10-22T03:30:08.991Z Evidence SHA-256 `2e7bc7983b3fe2fab5270a4dc00f51a40b87f5318a686fbae4291beda672f604` Source locator `/rows/36` |  |  |  |  |

---
Cite as: O1 Pro — Benchize, https://benchize.com/models/o1-pro (retrieved 2026-10-22)