# Hy4 preview vs Kimi K2.5 Instant

> Hy4 preview is the stronger model overall, scoring 44.6 to 42.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/hy4-preview-vs-kimi-k2-5-instant
- Last updated: 2026-10-10
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. Hy4 preview scores higher in 3 categories and Kimi K2.5 Instant in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Hy4 preview leads 54.5 to 36.6.

## Snapshot

| | Hy4 preview | Kimi K2.5 Instant |
|---|---|---|
| Provider | Tencent | Moonshot AI |
| Noometry Index | 44.6 | 42.9 |
| Rank | 73 | 92 |
| Context | 1.05M | — |
| Input $/M | $0.83 | — |
| Output $/M | $2.50 | — |
| Weights | Open | Open |

## Coding

- Hy4 preview: 51.4 (#36)
- Kimi K2.5 Instant: 42.3 (#95)

| Benchmark | Hy4 preview | Kimi K2.5 Instant |
|---|---|---|
| LMArena WebDev | 1633 | 1404 |
| LMArena Coding | — | 1483 |

## Reasoning

- Hy4 preview: 30.6 (#75)
- Kimi K2.5 Instant: 28.5 (#88)

| Benchmark | Hy4 preview | Kimi K2.5 Instant |
|---|---|---|
| NYT Connections (extended) | 68.2% | — |
| LMArena Hard Prompts | — | 1443 |

## Math

- Hy4 preview: 54.5 (#37)
- Kimi K2.5 Instant: 36.6 (#105)

| Benchmark | Hy4 preview | Kimi K2.5 Instant |
|---|---|---|
| ProofBench | 75% | — |
| LMArena Math | — | 1443 |

## Knowledge

- Hy4 preview: —
- Kimi K2.5 Instant: 39.5 (#121)

| Benchmark | Hy4 preview | Kimi K2.5 Instant |
|---|---|---|
| LMArena Expert | — | 1438 |

## Multimodal

- Hy4 preview: —
- Kimi K2.5 Instant: 39.5 (#47)

| Benchmark | Hy4 preview | Kimi K2.5 Instant |
|---|---|---|
| LMArena Vision | — | 1254 |

## Multilingual

- Hy4 preview: —
- Kimi K2.5 Instant: 52.2 (#89)

| Benchmark | Hy4 preview | Kimi K2.5 Instant |
|---|---|---|
| LMArena Non-English | — | 1406 |
| LMArena Chinese | — | 1450 |
| LMArena French | — | 1403 |
| LMArena German | — | 1413 |
| LMArena Korean | — | 1378 |
| LMArena Russian | — | 1404 |
| LMArena Spanish | — | 1448 |

## Instruction Following

- Hy4 preview: —
- Kimi K2.5 Instant: 75.5 (#61)

| Benchmark | Hy4 preview | Kimi K2.5 Instant |
|---|---|---|
| LMArena Instruction Following | — | 1430 |

## Long Context

- Hy4 preview: —
- Kimi K2.5 Instant: 43.8 (#82)

| Benchmark | Hy4 preview | Kimi K2.5 Instant |
|---|---|---|
| LMArena Longer Query | — | 1435 |

## Writing & Preference

- Hy4 preview: —
- Kimi K2.5 Instant: 60.8 (#91)

| Benchmark | Hy4 preview | Kimi K2.5 Instant |
|---|---|---|
| LMArena Text | — | 1420 |
| LMArena Creative Writing | — | 1379 |
| LMArena Multi-Turn | — | 1427 |

## FAQ

### Is Hy4 preview better than Kimi K2.5 Instant?

Hy4 preview is the stronger model overall, scoring 44.6 to 42.9 on the Noometry Index.

### Is Hy4 preview or Kimi K2.5 Instant better for coding?

Hy4 preview scores higher on coding benchmarks: 51.4 versus 42.3 in the Noometry coding category.

### How many benchmarks do Hy4 preview and Kimi K2.5 Instant share?

1 benchmark has published results for both models. Hy4 preview has 3 scored results on Noometry and Kimi K2.5 Instant has 18.