# Chatgpt 4o Latest 20250326 vs GPT-5.4 nano

> Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 41.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/chatgpt-4o-vs-gpt-5-4-nano
- Last updated: 2026-10-10
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. Chatgpt 4o Latest 20250326 scores higher in 6 categories and GPT-5.4 nano in 3 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Chatgpt 4o Latest 20250326 leads 33.8 to 23.7.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 75% for Chatgpt 4o Latest 20250326 and 39.7% for GPT-5.4 nano.

## Snapshot

| | Chatgpt 4o Latest 20250326 | GPT-5.4 nano |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 43.8 | 41.9 |
| Rank | 82 | 125 |
| Context | — | 400K |
| Input $/M | — | $0.20 |
| Output $/M | — | $1.25 |
| Weights | Proprietary | Proprietary |

## Coding

- Chatgpt 4o Latest 20250326: 41.6 (#122)
- GPT-5.4 nano: 43.6 (#84)

| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.4 nano |
|---|---|---|
| LMArena Coding | 1413 | 1405 |
| SciCode | — | 46.9% |
| WeirdML | — | 49.2% |
| ALE-Bench | — | 1,005 |

## Reasoning

- Chatgpt 4o Latest 20250326: 33.8 (#71)
- GPT-5.4 nano: 23.7 (#173)

| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.4 nano |
|---|---|---|
| Kagi LLM Benchmark | 75% | 39.7% |
| LMArena Hard Prompts | 1424 | 1381 |
| ARC-AGI-2 | — | 5.7% |
| ARC-AGI-1 | — | 51.5% |
| CritPt | — | 9.3% |
| Chess Puzzles | — | 30% |
| Mystery Game Puzzles | — | 9% |
| DTBench | — | 80.3% |
| LMCA | — | 36.9% |
| Epoch Capabilities Index | — | 145.81 |
| ForecastBench | — | 57.3 |

## Math

- Chatgpt 4o Latest 20250326: 38.6 (#134)
- GPT-5.4 nano: 40.9 (#88)

| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.4 nano |
|---|---|---|
| LMArena Math | 1407 | 1406 |
| FrontierMath (Tiers 1-3) | — | 44.9% |
| FrontierMath Tier 4 | — | 12.2% |
| OTIS Mock AIME 2024-2025 | — | 87.8% |
| ProofBench | — | 5% |
| FrontierMath (Feb 2025 set) | — | 25.9% |
| FrontierMath Tier 4 (v1) | — | 6.3% |

## Knowledge

- Chatgpt 4o Latest 20250326: 39.2 (#137)
- GPT-5.4 nano: 41.9 (#103)

| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.4 nano |
|---|---|---|
| LMArena Expert | 1401 | 1396 |
| GPQA Diamond | — | 78.5% |
| SimpleQA Verified | — | 11.7% |
| Confabulations | 16.6% | — |
| Vectara Hallucination Rate | — | 3.1% |

## Multimodal

- Chatgpt 4o Latest 20250326: 39.6 (#58)
- GPT-5.4 nano: 36.7 (#78)

| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.4 nano |
|---|---|---|
| LMArena Vision | 1243 | 1196 |

## Multilingual

- Chatgpt 4o Latest 20250326: 52.9 (#76)
- GPT-5.4 nano: 48.6 (#140)

| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.4 nano |
|---|---|---|
| LMArena Non-English | 1419 | 1359 |
| LMArena Chinese | 1457 | 1392 |
| LMArena French | 1446 | 1396 |
| LMArena German | 1423 | 1367 |
| LMArena Japanese | 1405 | 1343 |
| LMArena Korean | 1396 | 1320 |
| LMArena Russian | 1429 | 1363 |
| LMArena Spanish | 1434 | 1371 |

## Instruction Following

- Chatgpt 4o Latest 20250326: 74.0 (#107)
- GPT-5.4 nano: 71.9 (#144)

| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.4 nano |
|---|---|---|
| LMArena Instruction Following | 1403 | 1362 |

## Long Context

- Chatgpt 4o Latest 20250326: 43.1 (#107)
- GPT-5.4 nano: 41.6 (#137)

| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.4 nano |
|---|---|---|
| LMArena Longer Query | 1413 | 1366 |

## Writing & Preference

- Chatgpt 4o Latest 20250326: 62.6 (#72)
- GPT-5.4 nano: 55.7 (#142)

| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.4 nano |
|---|---|---|
| LMArena Text | 1429 | 1372 |
| LMArena Creative Writing | 1405 | 1314 |
| LMArena Multi-Turn | 1454 | 1382 |
| EQ-Bench Creative Writing | 1501 | — |

## FAQ

### Is Chatgpt 4o Latest 20250326 better than GPT-5.4 nano?

Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 41.9 on the Noometry Index.

### Is Chatgpt 4o Latest 20250326 or GPT-5.4 nano better for coding?

GPT-5.4 nano scores higher on coding benchmarks: 43.6 versus 41.6 in the Noometry coding category.

### How many benchmarks do Chatgpt 4o Latest 20250326 and GPT-5.4 nano share?

19 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and GPT-5.4 nano has 40.