# GPT-5.4 mini vs o3-pro

> GPT-5.4 mini is the stronger model overall, scoring 44.8 to 42.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-4-mini-vs-o3-pro
- Last updated: 2026-10-10
- Shared benchmarks: 8

## Summary

- They share 8 benchmarks with published results for both. GPT-5.4 mini scores higher in 3 categories and o3-pro in 2 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in long context, where o3-pro leads 72.1 to 42.9.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 37.9% for GPT-5.4 mini and 72.1% for o3-pro.
- GPT-5.4 mini is cheaper at $0.75 / $4.50 per million input/output tokens, against $20 / $80 for o3-pro.
- GPT-5.4 mini accepts more context: 400K tokens versus 200K.

## Snapshot

| | GPT-5.4 mini | o3-pro |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 44.8 | 42.7 |
| Rank | 69 | 94 |
| Context | 400K | 200K |
| Input $/M | $0.75 | $20 |
| Output $/M | $4.50 | $80 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.4 mini: 45.0 (#67)
- o3-pro: 55.1 (#22)

| Benchmark | GPT-5.4 mini | o3-pro |
|---|---|---|
| WeirdML | 60.3% | 58.2% |
| FrontierCode | 27% | — |
| Aider Polyglot | — | 84.9% |
| LMArena WebDev | 1397 | — |
| SciCode | 49.9% | — |
| LMArena Coding | 1438 | — |
| ALE-Bench | 1,189 | — |

## Agentic & Tool Use

- GPT-5.4 mini: 29.6 (#74)
- o3-pro: —

| Benchmark | GPT-5.4 mini | o3-pro |
|---|---|---|
| DeepResearch Bench | 36.3% | — |

## Reasoning

- GPT-5.4 mini: 30.3 (#77)
- o3-pro: 24.1 (#152)

| Benchmark | GPT-5.4 mini | o3-pro |
|---|---|---|
| ARC-AGI-2 | 18.9% | 4.9% |
| Kagi LLM Benchmark | 37.9% | 72.1% |
| ARC-AGI-1 | 63.7% | 59.3% |
| DTBench | 80% | 86.9% |
| LMCA | 40.8% | 38.5% |
| Epoch Capabilities Index | 148.83 | 147.43 |
| NYT Connections (extended) | 61.8% | — |
| CritPt | 10% | — |
| Chess Puzzles | 24% | — |
| Thematic Generalization | 61.7% | — |
| LMArena Hard Prompts | 1424 | — |
| Mystery Game Puzzles | 11% | — |
| ForecastBench | 57 | — |

## Math

- GPT-5.4 mini: 45.4 (#63)
- o3-pro: —

| Benchmark | GPT-5.4 mini | o3-pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | 51.2% | — |
| FrontierMath Tier 4 | 9.8% | — |
| OTIS Mock AIME 2024-2025 | 88.9% | — |
| ProofBench | 21% | — |
| LMArena Math | 1418 | — |
| FrontierMath (Feb 2025 set) | 28.3% | — |
| FrontierMath Tier 4 (v1) | 2.1% | — |

## Knowledge

- GPT-5.4 mini: 51.4 (#62)
- o3-pro: 29.0 (#234)

| Benchmark | GPT-5.4 mini | o3-pro |
|---|---|---|
| Vectara Hallucination Rate | 5.5% | 23.3% |
| GPQA Diamond | 86.9% | — |
| SimpleQA Verified | 29.4% | — |
| Confabulations | — | 14.2% |
| LMArena Expert | 1434 | — |

## Multimodal

- GPT-5.4 mini: 39.0 (#51)
- o3-pro: —

| Benchmark | GPT-5.4 mini | o3-pro |
|---|---|---|
| LMArena Vision | 1245 | — |

## Multilingual

- GPT-5.4 mini: 52.1 (#94)
- o3-pro: —

| Benchmark | GPT-5.4 mini | o3-pro |
|---|---|---|
| LMArena Non-English | 1405 | — |
| LMArena Chinese | 1446 | — |
| LMArena French | 1440 | — |
| LMArena German | 1407 | — |
| LMArena Japanese | 1375 | — |
| LMArena Korean | 1369 | — |
| LMArena Russian | 1417 | — |
| LMArena Spanish | 1403 | — |

## Instruction Following

- GPT-5.4 mini: 74.3 (#99)
- o3-pro: —

| Benchmark | GPT-5.4 mini | o3-pro |
|---|---|---|
| LMArena Instruction Following | 1405 | — |

## Long Context

- GPT-5.4 mini: 42.9 (#107)
- o3-pro: 72.1 (#1)

| Benchmark | GPT-5.4 mini | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |
| LMArena Longer Query | 1407 | — |

## Writing & Preference

- GPT-5.4 mini: 64.2 (#56)
- o3-pro: 57.1 (#128)

| Benchmark | GPT-5.4 mini | o3-pro |
|---|---|---|
| LMArena Text | 1411 | — |
| LMArena Creative Writing | 1370 | — |
| Short-Story Creative Writing | — | 84.4% |
| EQ-Bench Creative Writing | 1665 | — |
| LMArena Multi-Turn | 1429 | — |

## FAQ

### Is GPT-5.4 mini better than o3-pro?

GPT-5.4 mini is the stronger model overall, scoring 44.8 to 42.7 on the Noometry Index.

### Which is cheaper, GPT-5.4 mini or o3-pro?

GPT-5.4 mini is cheaper. It lists at $0.75 per million input tokens and $4.50 per million output tokens; o3-pro lists at $20 and $80.

### Is GPT-5.4 mini or o3-pro better for coding?

o3-pro scores higher on coding benchmarks: 55.1 versus 45.0 in the Noometry coding category.

### Which has the bigger context window?

GPT-5.4 mini does, with 400K tokens against 200K.

### How many benchmarks do GPT-5.4 mini and o3-pro share?

8 benchmarks have published results for both models. GPT-5.4 mini has 46 scored results on Noometry and o3-pro has 12.