# Hy4 preview vs Mercury

> Hy4 preview is the stronger model overall, scoring 44.6 to 37.3 on the Noometry Index.

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

## Summary

- The widest gap is in reasoning, where Hy4 preview leads 30.6 to 16.8.
- Hy4 preview has downloadable open weights; the other is API-only.

## Snapshot

| | Hy4 preview | Mercury |
|---|---|---|
| Provider | Tencent | Inception |
| Noometry Index | 44.6 | 37.3 |
| Rank | 73 | 192 |
| Context | 1.05M | — |
| Input $/M | $0.83 | — |
| Output $/M | $2.50 | — |
| Weights | Open | Proprietary |

## Coding

- Hy4 preview: 51.4 (#36)
- Mercury: 38.1 (#164)

| Benchmark | Hy4 preview | Mercury |
|---|---|---|
| LMArena WebDev | 1633 | — |
| LMArena Coding | — | 1323 |

## Reasoning

- Hy4 preview: 30.6 (#75)
- Mercury: 16.8 (#288)

| Benchmark | Hy4 preview | Mercury |
|---|---|---|
| Kagi LLM Benchmark | — | 21.6% |
| NYT Connections (extended) | 68.2% | — |
| LMArena Hard Prompts | — | 1284 |

## Math

- Hy4 preview: 54.5 (#37)
- Mercury: —

| Benchmark | Hy4 preview | Mercury |
|---|---|---|
| ProofBench | 75% | — |

## Multilingual

- Hy4 preview: —
- Mercury: 41.7 (#201)

| Benchmark | Hy4 preview | Mercury |
|---|---|---|
| LMArena Non-English | — | 1259 |

## Instruction Following

- Hy4 preview: —
- Mercury: 65.3 (#220)

| Benchmark | Hy4 preview | Mercury |
|---|---|---|
| LMArena Instruction Following | — | 1238 |

## Long Context

- Hy4 preview: —
- Mercury: 38.3 (#193)

| Benchmark | Hy4 preview | Mercury |
|---|---|---|
| LMArena Longer Query | — | 1264 |

## Writing & Preference

- Hy4 preview: —
- Mercury: 46.2 (#216)

| Benchmark | Hy4 preview | Mercury |
|---|---|---|
| LMArena Text | — | 1282 |
| LMArena Creative Writing | — | 1186 |
| LMArena Multi-Turn | — | 1283 |

## FAQ

### Is Hy4 preview better than Mercury?

Hy4 preview is the stronger model overall, scoring 44.6 to 37.3 on the Noometry Index.

### Is Hy4 preview or Mercury better for coding?

Hy4 preview scores higher on coding benchmarks: 51.4 versus 38.1 in the Noometry coding category.

### How many benchmarks do Hy4 preview and Mercury share?

0 benchmarks have published results for both models. Hy4 preview has 3 scored results on Noometry and Mercury has 9.