# MiMo-V2.6-Flash vs Step 5 Preview

> MiMo-V2.6-Flash and Step 5 Preview score almost the same on the Noometry Index (48.5 vs 47.9), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/mimo-v2-6-flash-vs-step-5-preview
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. MiMo-V2.6-Flash scores higher in 7 categories and Step 5 Preview in 2 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where MiMo-V2.6-Flash leads 51.9 to 46.1.
- The biggest single-benchmark swing is ProofBench: 63% for MiMo-V2.6-Flash and 42% for Step 5 Preview.
- MiMo-V2.6-Flash is cheaper at $0.14 / $0.28 per million input/output tokens, against $1 / $2.70 for Step 5 Preview.
- MiMo-V2.6-Flash accepts more context: 1.05M tokens versus 1.02M.
- MiMo-V2.6-Flash has downloadable open weights; the other is API-only.

## Snapshot

| | MiMo-V2.6-Flash | Step 5 Preview |
|---|---|---|
| Provider | Xiaomi | StepFun |
| Noometry Index | 48.5 | 47.9 |
| Rank | 55 | 58 |
| Context | 1.05M | 1.02M |
| Input $/M | $0.14 | $1 |
| Output $/M | $0.28 | $2.70 |
| Weights | Open | Proprietary |

## Coding

- MiMo-V2.6-Flash: 53.4 (#30)
- Step 5 Preview: 51.8 (#36)

| Benchmark | MiMo-V2.6-Flash | Step 5 Preview |
|---|---|---|
| LMArena WebDev | 1637 | 1564 |
| SciCode | 51.3% | 58.9% |
| LMArena Coding | 1504 | 1480 |

## Reasoning

- MiMo-V2.6-Flash: 36.5 (#66)
- Step 5 Preview: 40.0 (#57)

| Benchmark | MiMo-V2.6-Flash | Step 5 Preview |
|---|---|---|
| CritPt | 12% | 20.9% |
| LMArena Hard Prompts | 1482 | 1465 |

## Math

- MiMo-V2.6-Flash: 51.9 (#52)
- Step 5 Preview: 46.1 (#72)

| Benchmark | MiMo-V2.6-Flash | Step 5 Preview |
|---|---|---|
| ProofBench | 63% | 42% |
| LMArena Math | 1468 | 1470 |

## Knowledge

- MiMo-V2.6-Flash: 42.2 (#99)
- Step 5 Preview: 41.2 (#112)

| Benchmark | MiMo-V2.6-Flash | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1501 | 1470 |

## Multimodal

- MiMo-V2.6-Flash: 40.5 (#47)
- Step 5 Preview: 41.0 (#41)

| Benchmark | MiMo-V2.6-Flash | Step 5 Preview |
|---|---|---|
| LMArena Vision | 1259 | 1267 |

## Multilingual

- MiMo-V2.6-Flash: 54.0 (#51)
- Step 5 Preview: 53.8 (#54)

| Benchmark | MiMo-V2.6-Flash | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1434 | 1432 |
| LMArena Chinese | 1511 | 1519 |
| LMArena Russian | 1409 | 1436 |
| LMArena Spanish | 1456 | 1439 |
| LMArena French | 1475 | — |

## Instruction Following

- MiMo-V2.6-Flash: 76.8 (#35)
- Step 5 Preview: 76.0 (#50)

| Benchmark | MiMo-V2.6-Flash | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1463 | 1444 |

## Long Context

- MiMo-V2.6-Flash: 44.8 (#57)
- Step 5 Preview: 44.5 (#64)

| Benchmark | MiMo-V2.6-Flash | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1463 | 1455 |

## Writing & Preference

- MiMo-V2.6-Flash: 63.1 (#67)
- Step 5 Preview: 62.8 (#71)

| Benchmark | MiMo-V2.6-Flash | Step 5 Preview |
|---|---|---|
| LMArena Text | 1455 | 1442 |
| LMArena Creative Writing | 1400 | 1410 |
| LMArena Multi-Turn | 1451 | 1447 |

## FAQ

### Is MiMo-V2.6-Flash better than Step 5 Preview?

MiMo-V2.6-Flash and Step 5 Preview score almost the same on the Noometry Index (48.5 vs 47.9), so choose on price, context window or the category you care about most.

### Which is cheaper, MiMo-V2.6-Flash or Step 5 Preview?

MiMo-V2.6-Flash is cheaper. It lists at $0.14 per million input tokens and $0.28 per million output tokens; Step 5 Preview lists at $1 and $2.70.

### Is MiMo-V2.6-Flash or Step 5 Preview better for coding?

MiMo-V2.6-Flash scores higher on coding benchmarks: 53.4 versus 51.8 in the Noometry coding category.

### Which has the bigger context window?

MiMo-V2.6-Flash does, with 1.05M tokens against 1.02M.

### How many benchmarks do MiMo-V2.6-Flash and Step 5 Preview share?

18 benchmarks have published results for both models. MiMo-V2.6-Flash has 19 scored results on Noometry and Step 5 Preview has 18.