# MiMo-V2.5-Pro vs Step 5 Preview

> MiMo-V2.5-Pro is the stronger model overall, scoring 44.8 to 43.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/mimo-v2-5-pro-vs-step-5-preview
- Last updated: 2026-10-10
- Shared benchmarks: 3

## Summary

- They share 3 benchmarks with published results for both. MiMo-V2.5-Pro scores higher in 0 categories and Step 5 Preview in 2 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Step 5 Preview leads 38.0 to 25.9.
- The biggest single-benchmark swing is CritPt: 4% for MiMo-V2.5-Pro and 20.9% for Step 5 Preview.
- MiMo-V2.5-Pro is cheaper at $0.43 / $0.87 per million input/output tokens, against $1 / $2.70 for Step 5 Preview.
- MiMo-V2.5-Pro accepts more context: 1.05M tokens versus 1.02M.
- MiMo-V2.5-Pro has downloadable open weights; the other is API-only.

## Snapshot

| | MiMo-V2.5-Pro | Step 5 Preview |
|---|---|---|
| Provider | Xiaomi | StepFun |
| Noometry Index | 44.8 | 43.8 |
| Rank | 70 | 78 |
| Context | 1.05M | 1.02M |
| Input $/M | $0.43 | $1 |
| Output $/M | $0.87 | $2.70 |
| Weights | Open | Proprietary |

## Coding

- MiMo-V2.5-Pro: 47.0 (#58)
- Step 5 Preview: 50.6 (#40)

| Benchmark | MiMo-V2.5-Pro | Step 5 Preview |
|---|---|---|
| LMArena WebDev | 1477 | 1569 |
| SciCode | 50.2% | 58.9% |
| LMArena Coding | 1502 | — |
| ALE-Bench | 899.8 | — |

## Reasoning

- MiMo-V2.5-Pro: 25.9 (#124)
- Step 5 Preview: 38.0 (#58)

| Benchmark | MiMo-V2.5-Pro | Step 5 Preview |
|---|---|---|
| CritPt | 4% | 20.9% |
| NYT Connections (extended) | 34.4% | — |
| LMArena Hard Prompts | 1487 | — |
| DTBench | 84.5% | — |
| LMCA | 29.5% | — |

## Math

- MiMo-V2.5-Pro: 38.6 (#84)
- Step 5 Preview: —

| Benchmark | MiMo-V2.5-Pro | Step 5 Preview |
|---|---|---|
| ProofBench | 22% | — |
| LMArena Math | 1480 | — |

## Knowledge

- MiMo-V2.5-Pro: 41.5 (#100)
- Step 5 Preview: —

| Benchmark | MiMo-V2.5-Pro | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1501 | — |

## Multilingual

- MiMo-V2.5-Pro: 55.3 (#33)
- Step 5 Preview: —

| Benchmark | MiMo-V2.5-Pro | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1449 | — |
| LMArena Chinese | 1507 | — |
| LMArena French | 1489 | — |
| LMArena German | 1455 | — |
| LMArena Japanese | 1418 | — |
| LMArena Korean | 1436 | — |
| LMArena Russian | 1450 | — |
| LMArena Spanish | 1470 | — |

## Instruction Following

- MiMo-V2.5-Pro: 77.6 (#21)
- Step 5 Preview: —

| Benchmark | MiMo-V2.5-Pro | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1477 | — |

## Long Context

- MiMo-V2.5-Pro: 45.4 (#38)
- Step 5 Preview: —

| Benchmark | MiMo-V2.5-Pro | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1482 | — |

## Writing & Preference

- MiMo-V2.5-Pro: 65.5 (#47)
- Step 5 Preview: —

| Benchmark | MiMo-V2.5-Pro | Step 5 Preview |
|---|---|---|
| LMArena Text | 1465 | — |
| LMArena Creative Writing | 1440 | — |
| EQ-Bench Creative Writing | 1493 | — |
| EQ-Bench 4 | 1208 | — |
| LMArena Multi-Turn | 1477 | — |

## FAQ

### Is MiMo-V2.5-Pro better than Step 5 Preview?

MiMo-V2.5-Pro is the stronger model overall, scoring 44.8 to 43.8 on the Noometry Index.

### Which is cheaper, MiMo-V2.5-Pro or Step 5 Preview?

MiMo-V2.5-Pro is cheaper. It lists at $0.43 per million input tokens and $0.87 per million output tokens; Step 5 Preview lists at $1 and $2.70.

### Is MiMo-V2.5-Pro or Step 5 Preview better for coding?

Step 5 Preview scores higher on coding benchmarks: 50.6 versus 47.0 in the Noometry coding category.

### Which has the bigger context window?

MiMo-V2.5-Pro does, with 1.05M tokens against 1.02M.

### How many benchmarks do MiMo-V2.5-Pro and Step 5 Preview share?

3 benchmarks have published results for both models. MiMo-V2.5-Pro has 27 scored results on Noometry and Step 5 Preview has 3.