# GPT-5 Pro vs o3-pro

> GPT-5 Pro is the stronger model overall, scoring 46.4 to 42.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-pro-vs-o3-pro
- Last updated: 2026-10-12
- Shared benchmarks: 5

## Summary

- They share 5 benchmarks with published results for both. GPT-5 Pro scores higher in 2 categories and o3-pro in 1 category; 3 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5 Pro leads 56.7 to 29.5.
- The biggest single-benchmark swing is ARC-AGI-2: 18.3% for GPT-5 Pro and 4.9% for o3-pro.
- o3-pro is cheaper at $20 / $80 per million input/output tokens, against $15 / $120 for GPT-5 Pro.
- GPT-5 Pro accepts more context: 400K tokens versus 200K.

## Snapshot

| | GPT-5 Pro | o3-pro |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 46.4 | 42.9 |
| Rank | 64 | 105 |
| Context | 400K | 200K |
| Input $/M | $15 | $20 |
| Output $/M | $120 | $80 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5 Pro: 44.0 (#80)
- o3-pro: 55.5 (#24)

| Benchmark | GPT-5 Pro | o3-pro |
|---|---|---|
| WeirdML | 60.4% | 58.2% |
| Aider Polyglot | — | 84.9% |
| AlgoTune | 1.31 | — |

## Reasoning

- GPT-5 Pro: 38.9 (#62)
- o3-pro: 23.8 (#171)

| Benchmark | GPT-5 Pro | o3-pro |
|---|---|---|
| ARC-AGI-2 | 18.3% | 4.9% |
| Kagi LLM Benchmark | 76.8% | 72.1% |
| ARC-AGI-1 | 70.2% | 59.3% |
| Epoch Capabilities Index | 150.28 | 147.42 |
| SimpleBench | 61.6% | — |
| EnigmaEval | 18.8% | — |
| DTBench | — | 86.9% |
| LMCA | — | 38.5% |

## Math

- GPT-5 Pro: 48.5 (#63)
- o3-pro: —

| Benchmark | GPT-5 Pro | o3-pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | 55.8% | — |
| FrontierMath Tier 4 | 19.5% | — |
| FrontierMath Tier 4 (v1) | 14.6% | — |

## Knowledge

- GPT-5 Pro: 56.7 (#42)
- o3-pro: 29.5 (#238)

| Benchmark | GPT-5 Pro | o3-pro |
|---|---|---|
| Humanity's Last Exam | 31.6% | — |
| Confabulations | — | 14.2% |
| Vectara Hallucination Rate | — | 23.3% |

## Long Context

- GPT-5 Pro: —
- o3-pro: 72.2 (#1)

| Benchmark | GPT-5 Pro | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |

## Writing & Preference

- GPT-5 Pro: —
- o3-pro: 57.1 (#133)

| Benchmark | GPT-5 Pro | o3-pro |
|---|---|---|
| Short-Story Creative Writing | — | 84.4% |

## FAQ

### Is GPT-5 Pro better than o3-pro?

GPT-5 Pro is the stronger model overall, scoring 46.4 to 42.9 on the Noometry Index.

### Which is cheaper, GPT-5 Pro or o3-pro?

o3-pro is cheaper. It lists at $20 per million input tokens and $80 per million output tokens; GPT-5 Pro lists at $15 and $120.

### Is GPT-5 Pro or o3-pro better for coding?

o3-pro scores higher on coding benchmarks: 55.5 versus 44.0 in the Noometry coding category.

### Which has the bigger context window?

GPT-5 Pro does, with 400K tokens against 200K.

### How many benchmarks do GPT-5 Pro and o3-pro share?

5 benchmarks have published results for both models. GPT-5 Pro has 12 scored results on Noometry and o3-pro has 12.