# GPT-5.3 Chat vs Hy3

> Hy3 is the stronger model overall, scoring 44.2 to 42.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-3-chat-vs-hy3
- Last updated: 2026-10-11
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. GPT-5.3 Chat scores higher in 2 categories and Hy3 in 6 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in coding, where Hy3 leads 46.8 to 41.4.
- Hy3 is cheaper at $0.13 / $0.53 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
- Hy3 accepts more context: 262K tokens versus 128K.
- Hy3 has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.3 Chat | Hy3 |
|---|---|---|
| Provider | OpenAI | Tencent |
| Noometry Index | 42.8 | 44.2 |
| Rank | 109 | 79 |
| Context | 128K | 262K |
| Input $/M | $1.75 | $0.13 |
| Output $/M | $14 | $0.53 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.3 Chat: 41.4 (#124)
- Hy3: 46.8 (#63)

| Benchmark | GPT-5.3 Chat | Hy3 |
|---|---|---|
| LMArena Coding | 1408 | 1464 |
| LMArena WebDev | — | 1508 |

## Reasoning

- GPT-5.3 Chat: 28.5 (#102)
- Hy3: 26.1 (#136)

| Benchmark | GPT-5.3 Chat | Hy3 |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1447 |
| NYT Connections (extended) | — | 41.2% |

## Math

- GPT-5.3 Chat: 38.2 (#142)
- Hy3: 40.1 (#93)

| Benchmark | GPT-5.3 Chat | Hy3 |
|---|---|---|
| LMArena Math | 1389 | 1475 |

## Knowledge

- GPT-5.3 Chat: 38.8 (#140)
- Hy3: 40.8 (#114)

| Benchmark | GPT-5.3 Chat | Hy3 |
|---|---|---|
| LMArena Expert | 1397 | 1460 |

## Multilingual

- GPT-5.3 Chat: 50.3 (#124)
- Hy3: 53.5 (#65)

| Benchmark | GPT-5.3 Chat | Hy3 |
|---|---|---|
| LMArena Non-English | 1382 | 1426 |
| LMArena Chinese | 1432 | 1493 |
| LMArena French | 1397 | 1461 |
| LMArena German | 1384 | 1439 |
| LMArena Japanese | 1352 | 1392 |
| LMArena Korean | 1346 | 1395 |
| LMArena Russian | 1400 | 1432 |
| LMArena Spanish | 1371 | 1456 |

## Instruction Following

- GPT-5.3 Chat: 72.8 (#129)
- Hy3: 75.1 (#70)

| Benchmark | GPT-5.3 Chat | Hy3 |
|---|---|---|
| LMArena Instruction Following | 1378 | 1426 |

## Long Context

- GPT-5.3 Chat: 42.6 (#120)
- Hy3: 44.1 (#75)

| Benchmark | GPT-5.3 Chat | Hy3 |
|---|---|---|
| LMArena Longer Query | 1396 | 1442 |

## Writing & Preference

- GPT-5.3 Chat: 63.1 (#68)
- Hy3: 62.2 (#81)

| Benchmark | GPT-5.3 Chat | Hy3 |
|---|---|---|
| LMArena Text | 1389 | 1439 |
| LMArena Creative Writing | 1355 | 1402 |
| LMArena Multi-Turn | 1412 | 1436 |
| EQ-Bench Creative Writing | 1690 | — |

## FAQ

### Is GPT-5.3 Chat better than Hy3?

Hy3 is the stronger model overall, scoring 44.2 to 42.8 on the Noometry Index.

### Which is cheaper, GPT-5.3 Chat or Hy3?

Hy3 is cheaper. It lists at $0.13 per million input tokens and $0.53 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.

### Is GPT-5.3 Chat or Hy3 better for coding?

Hy3 scores higher on coding benchmarks: 46.8 versus 41.4 in the Noometry coding category.

### Which has the bigger context window?

Hy3 does, with 262K tokens against 128K.

### How many benchmarks do GPT-5.3 Chat and Hy3 share?

17 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Hy3 has 19.