# Hy4 preview vs MiMo-V2.5

> Hy4 preview is the stronger model overall, scoring 45.3 to 43.4 on the Noometry Index. MiMo-V2.5 costs 6.4× less per token, which makes it the better buy when Hy4 preview's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/hy4-preview-vs-mimo-v2-5
- Last updated: 2026-10-10
- Shared benchmarks: 2

## Summary

- They share 2 benchmarks with published results for both. Hy4 preview scores higher in 3 categories and MiMo-V2.5 in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Hy4 preview leads 55.7 to 36.8.
- The biggest single-benchmark swing is ProofBench: 75% for Hy4 preview and 16% for MiMo-V2.5.
- MiMo-V2.5 is cheaper at $0.14 / $0.28 per million input/output tokens, against $0.75 / $2.25 for Hy4 preview.

## Snapshot

| | Hy4 preview | MiMo-V2.5 |
|---|---|---|
| Provider | Tencent | Xiaomi |
| Noometry Index | 45.3 | 43.4 |
| Rank | 73 | 93 |
| Context | 1.05M | 1.05M |
| Input $/M | $0.75 | $0.14 |
| Output $/M | $2.25 | $0.28 |
| Weights | Open | Open |

## Coding

- Hy4 preview: 51.6 (#38)
- MiMo-V2.5: 43.9 (#81)

| Benchmark | Hy4 preview | MiMo-V2.5 |
|---|---|---|
| LMArena WebDev | 1632 | 1438 |
| SciCode | — | 43.1% |
| LMArena Coding | — | 1469 |
| ALE-Bench | — | 513.95 |

## Reasoning

- Hy4 preview: 31.9 (#79)
- MiMo-V2.5: 28.6 (#101)

| Benchmark | Hy4 preview | MiMo-V2.5 |
|---|---|---|
| NYT Connections (extended) | 68.2% | — |
| CritPt | — | 3.7% |
| LMArena Hard Prompts | — | 1450 |

## Math

- Hy4 preview: 55.7 (#42)
- MiMo-V2.5: 36.8 (#163)

| Benchmark | Hy4 preview | MiMo-V2.5 |
|---|---|---|
| ProofBench | 75% | 16% |
| LMArena Math | — | 1436 |

## Knowledge

- Hy4 preview: —
- MiMo-V2.5: 40.8 (#115)

| Benchmark | Hy4 preview | MiMo-V2.5 |
|---|---|---|
| LMArena Expert | — | 1460 |

## Multimodal

- Hy4 preview: —
- MiMo-V2.5: 39.8 (#54)

| Benchmark | Hy4 preview | MiMo-V2.5 |
|---|---|---|
| LMArena Vision | — | 1247 |

## Multilingual

- Hy4 preview: —
- MiMo-V2.5: 51.9 (#99)

| Benchmark | Hy4 preview | MiMo-V2.5 |
|---|---|---|
| LMArena Non-English | — | 1404 |
| LMArena Chinese | — | 1468 |
| LMArena French | — | 1447 |
| LMArena German | — | 1421 |
| LMArena Japanese | — | 1306 |
| LMArena Korean | — | 1363 |
| LMArena Russian | — | 1395 |
| LMArena Spanish | — | 1416 |

## Instruction Following

- Hy4 preview: —
- MiMo-V2.5: 75.5 (#60)

| Benchmark | Hy4 preview | MiMo-V2.5 |
|---|---|---|
| LMArena Instruction Following | — | 1434 |

## Long Context

- Hy4 preview: —
- MiMo-V2.5: 44.2 (#73)

| Benchmark | Hy4 preview | MiMo-V2.5 |
|---|---|---|
| LMArena Longer Query | — | 1445 |

## Writing & Preference

- Hy4 preview: —
- MiMo-V2.5: 61.6 (#86)

| Benchmark | Hy4 preview | MiMo-V2.5 |
|---|---|---|
| LMArena Text | — | 1428 |
| LMArena Creative Writing | — | 1393 |
| LMArena Multi-Turn | — | 1445 |

## FAQ

### Is Hy4 preview better than MiMo-V2.5?

Hy4 preview is the stronger model overall, scoring 45.3 to 43.4 on the Noometry Index. MiMo-V2.5 costs 6.4× less per token, which makes it the better buy when Hy4 preview's lead doesn't matter for your workload.

### Which is cheaper, Hy4 preview or MiMo-V2.5?

MiMo-V2.5 is cheaper. It lists at $0.14 per million input tokens and $0.28 per million output tokens; Hy4 preview lists at $0.75 and $2.25.

### Is Hy4 preview or MiMo-V2.5 better for coding?

Hy4 preview scores higher on coding benchmarks: 51.6 versus 43.9 in the Noometry coding category.

### Which has the bigger context window?

Both accept 1.05M tokens.

### How many benchmarks do Hy4 preview and MiMo-V2.5 share?

2 benchmarks have published results for both models. Hy4 preview has 3 scored results on Noometry and MiMo-V2.5 has 23.