# Chatgpt 4o Latest 20250326 vs Hy4 preview

> Hy4 preview is the stronger model overall, scoring 45.3 to 43.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/chatgpt-4o-vs-hy4-preview
- Last updated: 2026-10-11
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Hy4 preview leads 55.7 to 38.6.
- Hy4 preview has downloadable open weights; the other is API-only.

## Snapshot

| | Chatgpt 4o Latest 20250326 | Hy4 preview |
|---|---|---|
| Provider | OpenAI | Tencent |
| Noometry Index | 43.8 | 45.3 |
| Rank | 82 | 73 |
| Context | — | 1.05M |
| Input $/M | — | $0.83 |
| Output $/M | — | $2.50 |
| Weights | Proprietary | Open |

## Coding

- Chatgpt 4o Latest 20250326: 41.6 (#122)
- Hy4 preview: 51.6 (#38)

| Benchmark | Chatgpt 4o Latest 20250326 | Hy4 preview |
|---|---|---|
| LMArena WebDev | — | 1632 |
| LMArena Coding | 1413 | — |

## Reasoning

- Chatgpt 4o Latest 20250326: 33.8 (#71)
- Hy4 preview: 31.9 (#79)

| Benchmark | Chatgpt 4o Latest 20250326 | Hy4 preview |
|---|---|---|
| Kagi LLM Benchmark | 75% | — |
| NYT Connections (extended) | — | 68.2% |
| LMArena Hard Prompts | 1424 | — |

## Math

- Chatgpt 4o Latest 20250326: 38.6 (#134)
- Hy4 preview: 55.7 (#42)

| Benchmark | Chatgpt 4o Latest 20250326 | Hy4 preview |
|---|---|---|
| ProofBench | — | 75% |
| LMArena Math | 1407 | — |

## Knowledge

- Chatgpt 4o Latest 20250326: 39.2 (#137)
- Hy4 preview: —

| Benchmark | Chatgpt 4o Latest 20250326 | Hy4 preview |
|---|---|---|
| Confabulations | 16.6% | — |
| LMArena Expert | 1401 | — |

## Multimodal

- Chatgpt 4o Latest 20250326: 39.6 (#58)
- Hy4 preview: —

| Benchmark | Chatgpt 4o Latest 20250326 | Hy4 preview |
|---|---|---|
| LMArena Vision | 1243 | — |

## Multilingual

- Chatgpt 4o Latest 20250326: 52.9 (#76)
- Hy4 preview: —

| Benchmark | Chatgpt 4o Latest 20250326 | Hy4 preview |
|---|---|---|
| LMArena Non-English | 1419 | — |
| LMArena Chinese | 1457 | — |
| LMArena French | 1446 | — |
| LMArena German | 1423 | — |
| LMArena Japanese | 1405 | — |
| LMArena Korean | 1396 | — |
| LMArena Russian | 1429 | — |
| LMArena Spanish | 1434 | — |

## Instruction Following

- Chatgpt 4o Latest 20250326: 74.0 (#107)
- Hy4 preview: —

| Benchmark | Chatgpt 4o Latest 20250326 | Hy4 preview |
|---|---|---|
| LMArena Instruction Following | 1403 | — |

## Long Context

- Chatgpt 4o Latest 20250326: 43.1 (#107)
- Hy4 preview: —

| Benchmark | Chatgpt 4o Latest 20250326 | Hy4 preview |
|---|---|---|
| LMArena Longer Query | 1413 | — |

## Writing & Preference

- Chatgpt 4o Latest 20250326: 62.6 (#72)
- Hy4 preview: —

| Benchmark | Chatgpt 4o Latest 20250326 | Hy4 preview |
|---|---|---|
| LMArena Text | 1429 | — |
| LMArena Creative Writing | 1405 | — |
| EQ-Bench Creative Writing | 1501 | — |
| LMArena Multi-Turn | 1454 | — |

## FAQ

### Is Chatgpt 4o Latest 20250326 better than Hy4 preview?

Hy4 preview is the stronger model overall, scoring 45.3 to 43.8 on the Noometry Index.

### Is Chatgpt 4o Latest 20250326 or Hy4 preview better for coding?

Hy4 preview scores higher on coding benchmarks: 51.6 versus 41.6 in the Noometry coding category.

### How many benchmarks do Chatgpt 4o Latest 20250326 and Hy4 preview share?

0 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and Hy4 preview has 3.