# MiMo-V2.5 vs Step 2 16k Exp 202412

> MiMo-V2.5 is the stronger model overall, scoring 43.0 to 38.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/mimo-v2-5-vs-step-2-16k-exp-202412
- Last updated: 2026-10-10
- Shared benchmarks: 12

## Summary

- They share 12 benchmarks with published results for both. MiMo-V2.5 scores higher in 8 categories and Step 2 16k Exp 202412 in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where MiMo-V2.5 leads 61.8 to 52.5.
- MiMo-V2.5 has downloadable open weights; the other is API-only.

## Snapshot

| | MiMo-V2.5 | Step 2 16k Exp 202412 |
|---|---|---|
| Provider | Xiaomi | StepFun |
| Noometry Index | 43.0 | 38.6 |
| Rank | 89 | 173 |
| Context | 1.05M | — |
| Input $/M | $0.14 | — |
| Output $/M | $0.28 | — |
| Weights | Open | Proprietary |

## Coding

- MiMo-V2.5: 43.6 (#75)
- Step 2 16k Exp 202412: 37.9 (#170)

| Benchmark | MiMo-V2.5 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Coding | 1469 | 1316 |
| LMArena WebDev | 1438 | — |
| SciCode | 43.1% | — |
| ALE-Bench | 513.95 | — |

## Reasoning

- MiMo-V2.5: 27.8 (#98)
- Step 2 16k Exp 202412: 24.8 (#140)

| Benchmark | MiMo-V2.5 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Hard Prompts | 1450 | 1299 |
| CritPt | 3.7% | — |

## Math

- MiMo-V2.5: 35.4 (#145)
- Step 2 16k Exp 202412: 33.6 (#171)

| Benchmark | MiMo-V2.5 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Math | 1436 | 1305 |
| ProofBench | 16% | — |

## Knowledge

- MiMo-V2.5: 40.2 (#109)
- Step 2 16k Exp 202412: 34.6 (#187)

| Benchmark | MiMo-V2.5 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Expert | 1459 | 1279 |

## Multimodal

- MiMo-V2.5: 39.0 (#53)
- Step 2 16k Exp 202412: —

| Benchmark | MiMo-V2.5 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Vision | 1245 | — |

## Multilingual

- MiMo-V2.5: 52.0 (#96)
- Step 2 16k Exp 202412: 43.9 (#176)

| Benchmark | MiMo-V2.5 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Non-English | 1404 | 1290 |
| LMArena Chinese | 1467 | 1331 |
| LMArena Russian | 1395 | 1324 |
| LMArena French | 1447 | — |
| LMArena German | 1421 | — |
| LMArena Japanese | 1304 | — |
| LMArena Korean | 1363 | — |
| LMArena Spanish | 1412 | — |

## Instruction Following

- MiMo-V2.5: 75.7 (#55)
- Step 2 16k Exp 202412: 68.1 (#187)

| Benchmark | MiMo-V2.5 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Instruction Following | 1433 | 1287 |

## Long Context

- MiMo-V2.5: 44.1 (#69)
- Step 2 16k Exp 202412: 39.7 (#165)

| Benchmark | MiMo-V2.5 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Longer Query | 1444 | 1307 |

## Writing & Preference

- MiMo-V2.5: 61.8 (#82)
- Step 2 16k Exp 202412: 52.5 (#168)

| Benchmark | MiMo-V2.5 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Text | 1427 | 1321 |
| LMArena Creative Writing | 1392 | 1328 |
| LMArena Multi-Turn | 1445 | 1292 |

## FAQ

### Is MiMo-V2.5 better than Step 2 16k Exp 202412?

MiMo-V2.5 is the stronger model overall, scoring 43.0 to 38.6 on the Noometry Index.

### Is MiMo-V2.5 or Step 2 16k Exp 202412 better for coding?

MiMo-V2.5 scores higher on coding benchmarks: 43.6 versus 37.9 in the Noometry coding category.

### How many benchmarks do MiMo-V2.5 and Step 2 16k Exp 202412 share?

12 benchmarks have published results for both models. MiMo-V2.5 has 23 scored results on Noometry and Step 2 16k Exp 202412 has 12.