# DeepSeek-V3.1 vs MiMo-V2-Flash

> DeepSeek-V3.1 is the stronger model overall, scoring 42.8 to 41.3 on the Noometry Index. MiMo-V2-Flash costs 2.4× less per token, which makes it the better buy when DeepSeek-V3.1's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/deepseek-v3-1-vs-mimo-v2-flash
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. DeepSeek-V3.1 scores higher in 7 categories and MiMo-V2-Flash in 1 category; 4 gaps are clear of the uncertainty.
- The widest gap is in long context, where MiMo-V2-Flash leads 43.0 to 36.3.
- MiMo-V2-Flash is cheaper at $0.14 / $0.28 per million input/output tokens, against $0.25 / $0.95 for DeepSeek-V3.1.
- MiMo-V2-Flash accepts more context: 262K tokens versus 164K.

## Snapshot

| | DeepSeek-V3.1 | MiMo-V2-Flash |
|---|---|---|
| Provider | DeepSeek | Xiaomi |
| Noometry Index | 42.8 | 41.3 |
| Rank | 108 | 138 |
| Context | 164K | 262K |
| Input $/M | $0.25 | $0.14 |
| Output $/M | $0.95 | $0.28 |
| Weights | Open | Open |

## Coding

- DeepSeek-V3.1: 40.3 (#144)
- MiMo-V2-Flash: 36.1 (#211)

| Benchmark | DeepSeek-V3.1 | MiMo-V2-Flash |
|---|---|---|
| LMArena Coding | 1417 | 1443 |
| LMArena WebDev | — | 1330 |
| SciCode | — | 25.9% |
| WeirdML | 38.4% | — |
| ALE-Bench | — | 737.95 |

## Reasoning

- DeepSeek-V3.1: 27.9 (#110)
- MiMo-V2-Flash: 24.9 (#157)

| Benchmark | DeepSeek-V3.1 | MiMo-V2-Flash |
|---|---|---|
| LMArena Hard Prompts | 1417 | 1420 |
| SimpleBench | 40% | — |
| Kagi LLM Benchmark | 53.2% | — |
| CritPt | — | 0% |
| DTBench | 82.7% | — |
| LMCA | 24.3% | — |
| Epoch Capabilities Index | 139.92 | — |
| ForecastBench | 58 | — |

## Math

- DeepSeek-V3.1: 38.9 (#122)
- MiMo-V2-Flash: 38.3 (#139)

| Benchmark | DeepSeek-V3.1 | MiMo-V2-Flash |
|---|---|---|
| LMArena Math | 1420 | 1396 |

## Knowledge

- DeepSeek-V3.1: 43.7 (#90)
- MiMo-V2-Flash: 39.7 (#131)

| Benchmark | DeepSeek-V3.1 | MiMo-V2-Flash |
|---|---|---|
| LMArena Expert | 1405 | 1425 |
| Vectara Hallucination Rate | 5.5% | — |

## Multilingual

- DeepSeek-V3.1: 51.6 (#106)
- MiMo-V2-Flash: 51.0 (#113)

| Benchmark | DeepSeek-V3.1 | MiMo-V2-Flash |
|---|---|---|
| LMArena Non-English | 1400 | 1392 |
| LMArena Chinese | 1469 | 1462 |
| LMArena French | 1447 | 1429 |
| LMArena German | 1411 | 1395 |
| LMArena Japanese | 1378 | 1325 |
| LMArena Korean | 1337 | 1358 |
| LMArena Russian | 1405 | 1387 |
| LMArena Spanish | 1431 | 1420 |

## Instruction Following

- DeepSeek-V3.1: 73.9 (#110)
- MiMo-V2-Flash: 73.5 (#120)

| Benchmark | DeepSeek-V3.1 | MiMo-V2-Flash |
|---|---|---|
| LMArena Instruction Following | 1400 | 1392 |

## Long Context

- DeepSeek-V3.1: 36.3 (#232)
- MiMo-V2-Flash: 43.0 (#110)

| Benchmark | DeepSeek-V3.1 | MiMo-V2-Flash |
|---|---|---|
| LMArena Longer Query | 1422 | 1409 |
| Fiction.LiveBench | 52.8% | — |

## Writing & Preference

- DeepSeek-V3.1: 60.3 (#98)
- MiMo-V2-Flash: 59.7 (#106)

| Benchmark | DeepSeek-V3.1 | MiMo-V2-Flash |
|---|---|---|
| LMArena Text | 1420 | 1411 |
| LMArena Creative Writing | 1401 | 1375 |
| LMArena Multi-Turn | 1408 | 1404 |
| EQ-Bench Creative Writing | 1436 | — |

## FAQ

### Is DeepSeek-V3.1 better than MiMo-V2-Flash?

DeepSeek-V3.1 is the stronger model overall, scoring 42.8 to 41.3 on the Noometry Index. MiMo-V2-Flash costs 2.4× less per token, which makes it the better buy when DeepSeek-V3.1's lead doesn't matter for your workload.

### Which is cheaper, DeepSeek-V3.1 or MiMo-V2-Flash?

MiMo-V2-Flash is cheaper. It lists at $0.14 per million input tokens and $0.28 per million output tokens; DeepSeek-V3.1 lists at $0.25 and $0.95.

### Is DeepSeek-V3.1 or MiMo-V2-Flash better for coding?

DeepSeek-V3.1 scores higher on coding benchmarks: 40.3 versus 36.1 in the Noometry coding category.

### Which has the bigger context window?

MiMo-V2-Flash does, with 262K tokens against 164K.

### How many benchmarks do DeepSeek-V3.1 and MiMo-V2-Flash share?

17 benchmarks have published results for both models. DeepSeek-V3.1 has 27 scored results on Noometry and MiMo-V2-Flash has 21.