# Gemini 1.5 Flash 8B vs Mistral Small 3.1

> Mistral Small 3.1 is the stronger model overall, scoring 31.7 to 29.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-1-5-flash-8b-vs-mistral-small-3-1
- Last updated: 2026-10-12
- Shared benchmarks: 20

## Summary

- They share 20 benchmarks with published results for both. Gemini 1.5 Flash 8B scores higher in 2 categories and Mistral Small 3.1 in 7 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Mistral Small 3.1 leads 22.6 to 16.0.
- The biggest single-benchmark swing is GPQA Diamond: 33% for Gemini 1.5 Flash 8B and 41.9% for Mistral Small 3.1.
- Mistral Small 3.1 has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 1.5 Flash 8B | Mistral Small 3.1 |
|---|---|---|
| Provider | Google | Mistral AI |
| Noometry Index | 29.9 | 31.7 |
| Rank | 301 | 269 |
| Context | — | 128K |
| Input $/M | — | $0.35 |
| Output $/M | — | $0.56 |
| Weights | Proprietary | Open |

## Coding

- Gemini 1.5 Flash 8B: 35.5 (#225)
- Mistral Small 3.1: 38.3 (#179)

| Benchmark | Gemini 1.5 Flash 8B | Mistral Small 3.1 |
|---|---|---|
| LMArena Coding | 1218 | 1309 |

## Reasoning

- Gemini 1.5 Flash 8B: 20.0 (#244)
- Mistral Small 3.1: 19.7 (#254)

| Benchmark | Gemini 1.5 Flash 8B | Mistral Small 3.1 |
|---|---|---|
| LMArena Hard Prompts | 1209 | 1278 |
| Chess Puzzles | — | 1% |
| DTBench | 50% | — |
| Epoch Capabilities Index | — | 127.48 |

## Math

- Gemini 1.5 Flash 8B: 14.2 (#302)
- Mistral Small 3.1: 14.7 (#301)

| Benchmark | Gemini 1.5 Flash 8B | Mistral Small 3.1 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 4.6% | 3.9% |
| LMArena Math | 1207 | 1262 |
| Omni-MATH | — | 24.8% |

## Knowledge

- Gemini 1.5 Flash 8B: 16.0 (#289)
- Mistral Small 3.1: 22.6 (#271)

| Benchmark | Gemini 1.5 Flash 8B | Mistral Small 3.1 |
|---|---|---|
| GPQA Diamond | 33% | 41.9% |
| LMArena Expert | 1185 | 1257 |
| MMLU-Pro | — | 61% |
| GPQA (HELM) | — | 39.2% |

## Multimodal

- Gemini 1.5 Flash 8B: 28.2 (#115)
- Mistral Small 3.1: 33.2 (#99)

| Benchmark | Gemini 1.5 Flash 8B | Mistral Small 3.1 |
|---|---|---|
| LMArena Vision | 1044 | 1136 |

## Multilingual

- Gemini 1.5 Flash 8B: 38.5 (#229)
- Mistral Small 3.1: 41.2 (#209)

| Benchmark | Gemini 1.5 Flash 8B | Mistral Small 3.1 |
|---|---|---|
| LMArena Non-English | 1215 | 1255 |
| LMArena Chinese | 1231 | 1253 |
| LMArena French | 1234 | 1273 |
| LMArena German | 1206 | 1266 |
| LMArena Japanese | 1150 | 1208 |
| LMArena Korean | 1140 | 1206 |
| LMArena Russian | 1236 | 1263 |
| LMArena Spanish | 1212 | 1283 |

## Instruction Following

- Gemini 1.5 Flash 8B: 62.8 (#236)
- Mistral Small 3.1: 63.6 (#230)

| Benchmark | Gemini 1.5 Flash 8B | Mistral Small 3.1 |
|---|---|---|
| LMArena Instruction Following | 1199 | 1264 |
| IFEval | — | 75% |

## Long Context

- Gemini 1.5 Flash 8B: 37.0 (#225)
- Mistral Small 3.1: 39.5 (#178)

| Benchmark | Gemini 1.5 Flash 8B | Mistral Small 3.1 |
|---|---|---|
| LMArena Longer Query | 1219 | 1299 |

## Writing & Preference

- Gemini 1.5 Flash 8B: 42.8 (#232)
- Mistral Small 3.1: 37.0 (#259)

| Benchmark | Gemini 1.5 Flash 8B | Mistral Small 3.1 |
|---|---|---|
| LMArena Text | 1226 | 1277 |
| LMArena Creative Writing | 1218 | 1253 |
| LMArena Multi-Turn | 1185 | 1270 |
| EQ-Bench Creative Writing | — | 761 |
| WildBench | — | 78.8% |

## FAQ

### Is Gemini 1.5 Flash 8B better than Mistral Small 3.1?

Mistral Small 3.1 is the stronger model overall, scoring 31.7 to 29.9 on the Noometry Index.

### Is Gemini 1.5 Flash 8B or Mistral Small 3.1 better for coding?

Mistral Small 3.1 scores higher on coding benchmarks: 38.3 versus 35.5 in the Noometry coding category.

### How many benchmarks do Gemini 1.5 Flash 8B and Mistral Small 3.1 share?

20 benchmarks have published results for both models. Gemini 1.5 Flash 8B has 21 scored results on Noometry and Mistral Small 3.1 has 28.