# DeepSeek V4.1 Flash vs Mistral Small 3.1

> DeepSeek V4.1 Flash is the stronger model overall, scoring 50.3 to 31.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/deepseek-v4-1-flash-vs-mistral-small-3-1
- Last updated: 2026-10-10
- Shared benchmarks: 16

## Summary

- They share 16 benchmarks with published results for both. DeepSeek V4.1 Flash scores higher in 8 categories and Mistral Small 3.1 in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where DeepSeek V4.1 Flash leads 48.4 to 13.7.
- DeepSeek V4.1 Flash is cheaper at $0.15 / $0.60 per million input/output tokens, against $0.35 / $0.56 for Mistral Small 3.1.
- DeepSeek V4.1 Flash accepts more context: 1M tokens versus 128K.

## Snapshot

| | DeepSeek V4.1 Flash | Mistral Small 3.1 |
|---|---|---|
| Provider | DeepSeek | Mistral AI |
| Noometry Index | 50.3 | 31.4 |
| Rank | 40 | 263 |
| Context | 1M | 128K |
| Input $/M | $0.15 | $0.35 |
| Output $/M | $0.60 | $0.56 |
| Weights | Open | Open |

## Coding

- DeepSeek V4.1 Flash: 52.8 (#29)
- Mistral Small 3.1: 37.7 (#175)

| Benchmark | DeepSeek V4.1 Flash | Mistral Small 3.1 |
|---|---|---|
| LMArena Coding | 1511 | 1309 |
| LMArena WebDev | 1620 | — |
| SciCode | 51.9% | — |
| ALE-Bench | 1,092 | — |

## Reasoning

- DeepSeek V4.1 Flash: 46.2 (#39)
- Mistral Small 3.1: 18.9 (#249)

| Benchmark | DeepSeek V4.1 Flash | Mistral Small 3.1 |
|---|---|---|
| LMArena Hard Prompts | 1485 | 1278 |
| Epoch Capabilities Index | 155.01 | 127.48 |
| NYT Connections (extended) | 89.6% | — |
| CritPt | 14.3% | — |
| Chess Puzzles | — | 1% |
| DTBench | 89.9% | — |
| LMCA | 47% | — |
| Surface Evolver Bench | 46.3% | — |

## Math

- DeepSeek V4.1 Flash: 48.4 (#52)
- Mistral Small 3.1: 13.7 (#295)

| Benchmark | DeepSeek V4.1 Flash | Mistral Small 3.1 |
|---|---|---|
| LMArena Math | 1493 | 1261 |
| OTIS Mock AIME 2024-2025 | — | 3.9% |
| ProofBench | 54% | — |
| Omni-MATH | — | 24.8% |

## Knowledge

- DeepSeek V4.1 Flash: 41.6 (#97)
- Mistral Small 3.1: 22.6 (#266)

| Benchmark | DeepSeek V4.1 Flash | Mistral Small 3.1 |
|---|---|---|
| LMArena Expert | 1505 | 1258 |
| GPQA Diamond | — | 41.9% |
| MMLU-Pro | — | 61% |
| GPQA (HELM) | — | 39.2% |

## Multimodal

- DeepSeek V4.1 Flash: —
- Mistral Small 3.1: 32.6 (#93)

| Benchmark | DeepSeek V4.1 Flash | Mistral Small 3.1 |
|---|---|---|
| LMArena Vision | — | 1136 |

## Multilingual

- DeepSeek V4.1 Flash: 55.5 (#29)
- Mistral Small 3.1: 41.4 (#204)

| Benchmark | DeepSeek V4.1 Flash | Mistral Small 3.1 |
|---|---|---|
| LMArena Non-English | 1452 | 1255 |
| LMArena Chinese | 1506 | 1254 |
| LMArena French | 1448 | 1270 |
| LMArena Russian | 1473 | 1263 |
| LMArena Spanish | 1499 | 1283 |
| LMArena German | — | 1266 |
| LMArena Japanese | — | 1210 |
| LMArena Korean | — | 1206 |

## Instruction Following

- DeepSeek V4.1 Flash: 77.6 (#24)
- Mistral Small 3.1: 63.8 (#225)

| Benchmark | DeepSeek V4.1 Flash | Mistral Small 3.1 |
|---|---|---|
| LMArena Instruction Following | 1475 | 1264 |
| IFEval | — | 75% |

## Long Context

- DeepSeek V4.1 Flash: 45.2 (#46)
- Mistral Small 3.1: 39.5 (#172)

| Benchmark | DeepSeek V4.1 Flash | Mistral Small 3.1 |
|---|---|---|
| LMArena Longer Query | 1476 | 1300 |

## Writing & Preference

- DeepSeek V4.1 Flash: 65.8 (#43)
- Mistral Small 3.1: 37.2 (#254)

| Benchmark | DeepSeek V4.1 Flash | Mistral Small 3.1 |
|---|---|---|
| LMArena Text | 1465 | 1278 |
| LMArena Creative Writing | 1436 | 1253 |
| EQ-Bench Creative Writing | 1540 | 761 |
| LMArena Multi-Turn | 1460 | 1270 |
| WildBench | — | 78.8% |

## FAQ

### Is DeepSeek V4.1 Flash better than Mistral Small 3.1?

DeepSeek V4.1 Flash is the stronger model overall, scoring 50.3 to 31.4 on the Noometry Index.

### Which is cheaper, DeepSeek V4.1 Flash or Mistral Small 3.1?

DeepSeek V4.1 Flash is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Mistral Small 3.1 lists at $0.35 and $0.56.

### Is DeepSeek V4.1 Flash or Mistral Small 3.1 better for coding?

DeepSeek V4.1 Flash scores higher on coding benchmarks: 52.8 versus 37.7 in the Noometry coding category.

### Which has the bigger context window?

DeepSeek V4.1 Flash does, with 1M tokens against 128K.

### How many benchmarks do DeepSeek V4.1 Flash and Mistral Small 3.1 share?

16 benchmarks have published results for both models. DeepSeek V4.1 Flash has 25 scored results on Noometry and Mistral Small 3.1 has 28.