# Chatgpt 4o Latest 20250326 vs GLM-4.5-Air

> Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 38.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/chatgpt-4o-vs-glm-4-5-air
- Last updated: 2026-10-12
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Chatgpt 4o Latest 20250326 scores higher in 8 categories and GLM-4.5-Air in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Chatgpt 4o Latest 20250326 leads 33.8 to 24.1.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 75% for Chatgpt 4o Latest 20250326 and 43% for GLM-4.5-Air.
- GLM-4.5-Air has downloadable open weights; the other is API-only.

## Snapshot

| | Chatgpt 4o Latest 20250326 | GLM-4.5-Air |
|---|---|---|
| Provider | OpenAI | Z.ai (Zhipu) |
| Noometry Index | 43.8 | 38.9 |
| Rank | 82 | 177 |
| Context | — | 131K |
| Input $/M | — | $0.20 |
| Output $/M | — | $1.10 |
| Weights | Proprietary | Open |

## Coding

- Chatgpt 4o Latest 20250326: 41.6 (#122)
- GLM-4.5-Air: 33.3 (#259)

| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5-Air |
|---|---|---|
| LMArena Coding | 1413 | 1397 |
| GSO | — | 2.9% |

## Reasoning

- Chatgpt 4o Latest 20250326: 33.8 (#71)
- GLM-4.5-Air: 24.1 (#166)

| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5-Air |
|---|---|---|
| Kagi LLM Benchmark | 75% | 43% |
| LMArena Hard Prompts | 1424 | 1379 |
| ForecastBench | — | 59.2 |

## Math

- Chatgpt 4o Latest 20250326: 38.6 (#134)
- GLM-4.5-Air: 36.2 (#170)

| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5-Air |
|---|---|---|
| LMArena Math | 1407 | 1396 |
| Omni-MATH | — | 39.1% |

## Knowledge

- Chatgpt 4o Latest 20250326: 39.2 (#137)
- GLM-4.5-Air: 35.0 (#191)

| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5-Air |
|---|---|---|
| LMArena Expert | 1401 | 1370 |
| Humanity's Last Exam | — | 8.1% |
| MMLU-Pro | — | 76.2% |
| Confabulations | 16.6% | — |
| Vectara Hallucination Rate | — | 9.3% |
| GPQA (HELM) | — | 59.4% |

## Multimodal

- Chatgpt 4o Latest 20250326: 39.6 (#58)
- GLM-4.5-Air: —

| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5-Air |
|---|---|---|
| LMArena Vision | 1243 | — |

## Multilingual

- Chatgpt 4o Latest 20250326: 52.9 (#76)
- GLM-4.5-Air: 49.1 (#135)

| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5-Air |
|---|---|---|
| LMArena Non-English | 1419 | 1366 |
| LMArena Chinese | 1457 | 1426 |
| LMArena French | 1446 | 1399 |
| LMArena German | 1423 | 1377 |
| LMArena Japanese | 1405 | 1348 |
| LMArena Korean | 1396 | 1308 |
| LMArena Russian | 1429 | 1373 |
| LMArena Spanish | 1434 | 1386 |

## Instruction Following

- Chatgpt 4o Latest 20250326: 74.0 (#107)
- GLM-4.5-Air: 69.6 (#171)

| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5-Air |
|---|---|---|
| LMArena Instruction Following | 1403 | 1354 |
| IFEval | — | 81.2% |

## Long Context

- Chatgpt 4o Latest 20250326: 43.1 (#107)
- GLM-4.5-Air: 41.6 (#135)

| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5-Air |
|---|---|---|
| LMArena Longer Query | 1413 | 1366 |

## Writing & Preference

- Chatgpt 4o Latest 20250326: 62.6 (#72)
- GLM-4.5-Air: 55.9 (#139)

| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5-Air |
|---|---|---|
| LMArena Text | 1429 | 1384 |
| LMArena Creative Writing | 1405 | 1343 |
| LMArena Multi-Turn | 1454 | 1371 |
| EQ-Bench Creative Writing | 1501 | — |
| WildBench | — | 78.9% |

## FAQ

### Is Chatgpt 4o Latest 20250326 better than GLM-4.5-Air?

Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 38.9 on the Noometry Index.

### Is Chatgpt 4o Latest 20250326 or GLM-4.5-Air better for coding?

Chatgpt 4o Latest 20250326 scores higher on coding benchmarks: 41.6 versus 33.3 in the Noometry coding category.

### How many benchmarks do Chatgpt 4o Latest 20250326 and GLM-4.5-Air share?

18 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and GLM-4.5-Air has 27.