# Mistral Small 3.1 vs Qwen3.5-Flash

> Qwen3.5-Flash is the stronger model overall, scoring 42.5 to 31.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/mistral-small-3-1-vs-qwen3-5-flash
- Last updated: 2026-10-12
- Shared benchmarks: 21

## Summary

- They share 21 benchmarks with published results for both. Mistral Small 3.1 scores higher in 1 category and Qwen3.5-Flash in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Qwen3.5-Flash leads 37.4 to 14.7.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 3.9% for Mistral Small 3.1 and 84.4% for Qwen3.5-Flash.
- Qwen3.5-Flash is cheaper at $0.10 / $0.40 per million input/output tokens, against $0.35 / $0.56 for Mistral Small 3.1.
- Qwen3.5-Flash accepts more context: 1M tokens versus 128K.
- Mistral Small 3.1 has downloadable open weights; the other is API-only.

## Snapshot

| | Mistral Small 3.1 | Qwen3.5-Flash |
|---|---|---|
| Provider | Mistral AI | Alibaba (Qwen) |
| Noometry Index | 31.7 | 42.5 |
| Rank | 269 | 112 |
| Context | 128K | 1M |
| Input $/M | $0.35 | $0.10 |
| Output $/M | $0.56 | $0.40 |
| Weights | Open | Proprietary |

## Coding

- Mistral Small 3.1: 38.3 (#179)
- Qwen3.5-Flash: 34.2 (#242)

| Benchmark | Mistral Small 3.1 | Qwen3.5-Flash |
|---|---|---|
| LMArena Coding | 1309 | 1412 |
| LMArena WebDev | — | 1244 |
| ALE-Bench | — | 221.8 |

## Agentic & Tool Use

- Mistral Small 3.1: —
- Qwen3.5-Flash: —

| Benchmark | Mistral Small 3.1 | Qwen3.5-Flash |
|---|---|---|
| Vending-Bench 2 | — | 462.69 |

## Reasoning

- Mistral Small 3.1: 19.7 (#254)
- Qwen3.5-Flash: 33.7 (#72)

| Benchmark | Mistral Small 3.1 | Qwen3.5-Flash |
|---|---|---|
| Chess Puzzles | 1% | 21% |
| LMArena Hard Prompts | 1278 | 1403 |
| Epoch Capabilities Index | 127.48 | 143.98 |
| Mystery Game Puzzles | — | 20% |
| DTBench | — | 82.9% |
| LMCA | — | 29.1% |

## Math

- Mistral Small 3.1: 14.7 (#301)
- Qwen3.5-Flash: 37.4 (#158)

| Benchmark | Mistral Small 3.1 | Qwen3.5-Flash |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 3.9% | 84.4% |
| LMArena Math | 1262 | 1407 |
| FrontierMath (Tiers 1-3) | — | 18.2% |
| Omni-MATH | 24.8% | — |
| FrontierMath (Feb 2025 set) | — | 6.2% |
| FrontierMath Tier 4 (v1) | — | 0% |

## Knowledge

- Mistral Small 3.1: 22.6 (#271)
- Qwen3.5-Flash: 43.2 (#93)

| Benchmark | Mistral Small 3.1 | Qwen3.5-Flash |
|---|---|---|
| GPQA Diamond | 41.9% | 82.3% |
| LMArena Expert | 1257 | 1407 |
| SimpleQA Verified | — | 20.3% |
| MMLU-Pro | 61% | — |
| Vectara Hallucination Rate | — | 10.5% |
| GPQA (HELM) | 39.2% | — |

## Multimodal

- Mistral Small 3.1: 33.2 (#99)
- Qwen3.5-Flash: —

| Benchmark | Mistral Small 3.1 | Qwen3.5-Flash |
|---|---|---|
| LMArena Vision | 1136 | — |

## Multilingual

- Mistral Small 3.1: 41.2 (#209)
- Qwen3.5-Flash: 50.5 (#121)

| Benchmark | Mistral Small 3.1 | Qwen3.5-Flash |
|---|---|---|
| LMArena Non-English | 1255 | 1385 |
| LMArena Chinese | 1253 | 1446 |
| LMArena French | 1273 | 1412 |
| LMArena German | 1266 | 1390 |
| LMArena Japanese | 1208 | 1368 |
| LMArena Korean | 1206 | 1344 |
| LMArena Russian | 1263 | 1379 |
| LMArena Spanish | 1283 | 1400 |

## Instruction Following

- Mistral Small 3.1: 63.6 (#230)
- Qwen3.5-Flash: 72.6 (#139)

| Benchmark | Mistral Small 3.1 | Qwen3.5-Flash |
|---|---|---|
| LMArena Instruction Following | 1264 | 1374 |
| IFEval | 75% | — |

## Long Context

- Mistral Small 3.1: 39.5 (#178)
- Qwen3.5-Flash: 42.4 (#124)

| Benchmark | Mistral Small 3.1 | Qwen3.5-Flash |
|---|---|---|
| LMArena Longer Query | 1299 | 1392 |

## Writing & Preference

- Mistral Small 3.1: 37.0 (#259)
- Qwen3.5-Flash: 57.9 (#122)

| Benchmark | Mistral Small 3.1 | Qwen3.5-Flash |
|---|---|---|
| LMArena Text | 1277 | 1397 |
| LMArena Creative Writing | 1253 | 1343 |
| LMArena Multi-Turn | 1270 | 1393 |
| EQ-Bench Creative Writing | 761 | — |
| WildBench | 78.8% | — |

## FAQ

### Is Mistral Small 3.1 better than Qwen3.5-Flash?

Qwen3.5-Flash is the stronger model overall, scoring 42.5 to 31.7 on the Noometry Index.

### Which is cheaper, Mistral Small 3.1 or Qwen3.5-Flash?

Qwen3.5-Flash is cheaper. It lists at $0.10 per million input tokens and $0.40 per million output tokens; Mistral Small 3.1 lists at $0.35 and $0.56.

### Is Mistral Small 3.1 or Qwen3.5-Flash better for coding?

Mistral Small 3.1 scores higher on coding benchmarks: 38.3 versus 34.2 in the Noometry coding category.

### Which has the bigger context window?

Qwen3.5-Flash does, with 1M tokens against 128K.

### How many benchmarks do Mistral Small 3.1 and Qwen3.5-Flash share?

21 benchmarks have published results for both models. Mistral Small 3.1 has 28 scored results on Noometry and Qwen3.5-Flash has 32.