# MiMo-V2.5-Pro vs Step 3.5 Flash

> MiMo-V2.5-Pro is the stronger model overall, scoring 45.2 to 42.3 on the Noometry Index. Step 3.5 Flash costs 3.6× less per token, which makes it the better buy when MiMo-V2.5-Pro's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/mimo-v2-5-pro-vs-step-3-5-flash
- Last updated: 2026-10-11
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. MiMo-V2.5-Pro scores higher in 7 categories and Step 3.5 Flash in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where MiMo-V2.5-Pro leads 65.3 to 58.8.
- The biggest single-benchmark swing is NYT Connections (extended): 34.4% for MiMo-V2.5-Pro and 28.4% for Step 3.5 Flash.
- Step 3.5 Flash is cheaper at $0.10 / $0.30 per million input/output tokens, against $0.43 / $0.87 for MiMo-V2.5-Pro.
- MiMo-V2.5-Pro accepts more context: 1.05M tokens versus 256K.

## Snapshot

| | MiMo-V2.5-Pro | Step 3.5 Flash |
|---|---|---|
| Provider | Xiaomi | StepFun |
| Noometry Index | 45.2 | 42.3 |
| Rank | 74 | 116 |
| Context | 1.05M | 256K |
| Input $/M | $0.43 | $0.10 |
| Output $/M | $0.87 | $0.30 |
| Weights | Open | Open |

## Coding

- MiMo-V2.5-Pro: 47.4 (#60)
- Step 3.5 Flash: 42.4 (#105)

| Benchmark | MiMo-V2.5-Pro | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | 1503 | 1436 |
| LMArena WebDev | 1479 | — |
| SciCode | 50.2% | — |
| ALE-Bench | 899.8 | — |

## Reasoning

- MiMo-V2.5-Pro: 26.8 (#130)
- Step 3.5 Flash: 22.2 (#202)

| Benchmark | MiMo-V2.5-Pro | Step 3.5 Flash |
|---|---|---|
| NYT Connections (extended) | 34.4% | 28.4% |
| LMArena Hard Prompts | 1488 | 1411 |
| CritPt | 4% | — |
| DTBench | 84.5% | — |
| LMCA | 29.5% | — |

## Math

- MiMo-V2.5-Pro: 40.0 (#96)
- Step 3.5 Flash: 42.6 (#84)

| Benchmark | MiMo-V2.5-Pro | Step 3.5 Flash |
|---|---|---|
| LMArena Math | 1481 | 1408 |
| MathArena Final-Answer Competitions | — | 66.8% |
| ProofBench | 22% | — |

## Knowledge

- MiMo-V2.5-Pro: 42.2 (#98)
- Step 3.5 Flash: 39.6 (#132)

| Benchmark | MiMo-V2.5-Pro | Step 3.5 Flash |
|---|---|---|
| LMArena Expert | 1503 | 1421 |

## Multilingual

- MiMo-V2.5-Pro: 55.1 (#34)
- Step 3.5 Flash: 50.5 (#119)

| Benchmark | MiMo-V2.5-Pro | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | 1449 | 1385 |
| LMArena Chinese | 1507 | 1447 |
| LMArena French | 1488 | 1421 |
| LMArena German | 1458 | 1405 |
| LMArena Japanese | 1412 | 1354 |
| LMArena Korean | 1437 | 1352 |
| LMArena Russian | 1450 | 1385 |
| LMArena Spanish | 1471 | 1419 |

## Instruction Following

- MiMo-V2.5-Pro: 77.5 (#21)
- Step 3.5 Flash: 73.1 (#124)

| Benchmark | MiMo-V2.5-Pro | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1477 | 1385 |

## Long Context

- MiMo-V2.5-Pro: 45.4 (#37)
- Step 3.5 Flash: 42.8 (#117)

| Benchmark | MiMo-V2.5-Pro | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | 1483 | 1402 |

## Writing & Preference

- MiMo-V2.5-Pro: 65.3 (#49)
- Step 3.5 Flash: 58.8 (#113)

| Benchmark | MiMo-V2.5-Pro | Step 3.5 Flash |
|---|---|---|
| LMArena Text | 1465 | 1403 |
| LMArena Creative Writing | 1440 | 1357 |
| LMArena Multi-Turn | 1477 | 1405 |
| EQ-Bench Creative Writing | 1493 | — |
| EQ-Bench 4 | 1208 | — |

## FAQ

### Is MiMo-V2.5-Pro better than Step 3.5 Flash?

MiMo-V2.5-Pro is the stronger model overall, scoring 45.2 to 42.3 on the Noometry Index. Step 3.5 Flash costs 3.6× less per token, which makes it the better buy when MiMo-V2.5-Pro's lead doesn't matter for your workload.

### Which is cheaper, MiMo-V2.5-Pro or Step 3.5 Flash?

Step 3.5 Flash is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; MiMo-V2.5-Pro lists at $0.43 and $0.87.

### Is MiMo-V2.5-Pro or Step 3.5 Flash better for coding?

MiMo-V2.5-Pro scores higher on coding benchmarks: 47.4 versus 42.4 in the Noometry coding category.

### Which has the bigger context window?

MiMo-V2.5-Pro does, with 1.05M tokens against 256K.

### How many benchmarks do MiMo-V2.5-Pro and Step 3.5 Flash share?

18 benchmarks have published results for both models. MiMo-V2.5-Pro has 27 scored results on Noometry and Step 3.5 Flash has 19.