# GPT-5.2 Pro vs o3-pro

> GPT-5.2 Pro is the stronger model overall, scoring 52.2 to 42.7 on the Noometry Index. o3-pro costs 1.6× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-5-2-pro-vs-o3-pro
- Last updated: 2026-10-10
- Shared benchmarks: 3

## Summary

- They share 3 benchmarks with published results for both. GPT-5.2 Pro scores higher in 1 category and o3-pro in 0 categories; one gap is clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.2 Pro leads 51.8 to 24.1.
- The biggest single-benchmark swing is ARC-AGI-2: 54.2% for GPT-5.2 Pro and 4.9% for o3-pro.
- o3-pro is cheaper at $20 / $80 per million input/output tokens, against $21 / $168 for GPT-5.2 Pro.
- GPT-5.2 Pro accepts more context: 400K tokens versus 200K.

## Snapshot

| | GPT-5.2 Pro | o3-pro |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 52.2 | 42.7 |
| Rank | 34 | 94 |
| Context | 400K | 200K |
| Input $/M | $21 | $20 |
| Output $/M | $168 | $80 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.2 Pro: —
- o3-pro: 55.1 (#22)

| Benchmark | GPT-5.2 Pro | o3-pro |
|---|---|---|
| Aider Polyglot | — | 84.9% |
| WeirdML | — | 58.2% |

## Reasoning

- GPT-5.2 Pro: 51.8 (#31)
- o3-pro: 24.1 (#152)

| Benchmark | GPT-5.2 Pro | o3-pro |
|---|---|---|
| ARC-AGI-2 | 54.2% | 4.9% |
| ARC-AGI-1 | 90.5% | 59.3% |
| Epoch Capabilities Index | 155.41 | 147.43 |
| SimpleBench | 57.4% | — |
| Kagi LLM Benchmark | — | 72.1% |
| NYT Connections (extended) | 79.3% | — |
| DTBench | — | 86.9% |
| LMCA | — | 38.5% |

## Math

- GPT-5.2 Pro: 64.8 (#23)
- o3-pro: —

| Benchmark | GPT-5.2 Pro | o3-pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | 74% | — |
| FrontierMath Tier 4 | 46% | — |
| FrontierMath Tier 4 (v1) | 31.3% | — |

## Knowledge

- GPT-5.2 Pro: —
- o3-pro: 29.0 (#234)

| Benchmark | GPT-5.2 Pro | o3-pro |
|---|---|---|
| Confabulations | — | 14.2% |
| Vectara Hallucination Rate | — | 23.3% |

## Long Context

- GPT-5.2 Pro: —
- o3-pro: 72.1 (#1)

| Benchmark | GPT-5.2 Pro | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |

## Writing & Preference

- GPT-5.2 Pro: —
- o3-pro: 57.1 (#128)

| Benchmark | GPT-5.2 Pro | o3-pro |
|---|---|---|
| Short-Story Creative Writing | — | 84.4% |

## FAQ

### Is GPT-5.2 Pro better than o3-pro?

GPT-5.2 Pro is the stronger model overall, scoring 52.2 to 42.7 on the Noometry Index. o3-pro costs 1.6× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.

### Which is cheaper, GPT-5.2 Pro or o3-pro?

o3-pro is cheaper. It lists at $20 per million input tokens and $80 per million output tokens; GPT-5.2 Pro lists at $21 and $168.

### Which has the bigger context window?

GPT-5.2 Pro does, with 400K tokens against 200K.

### How many benchmarks do GPT-5.2 Pro and o3-pro share?

3 benchmarks have published results for both models. GPT-5.2 Pro has 8 scored results on Noometry and o3-pro has 12.