# Mercury vs Mistral Small 3.1

> Mercury is the stronger model overall, scoring 37.6 to 31.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/mercury-vs-mistral-small-3-1
- Last updated: 2026-10-11
- Shared benchmarks: 8

## Summary

- They share 8 benchmarks with published results for both. Mercury scores higher in 4 categories and Mistral Small 3.1 in 2 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Mercury leads 46.2 to 37.0.
- Mistral Small 3.1 has downloadable open weights; the other is API-only.

## Snapshot

| | Mercury | Mistral Small 3.1 |
|---|---|---|
| Provider | Inception | Mistral AI |
| Noometry Index | 37.6 | 31.7 |
| Rank | 199 | 269 |
| Context | — | 128K |
| Input $/M | — | $0.35 |
| Output $/M | — | $0.56 |
| Weights | Proprietary | Open |

## Coding

- Mercury: 38.7 (#170)
- Mistral Small 3.1: 38.3 (#179)

| Benchmark | Mercury | Mistral Small 3.1 |
|---|---|---|
| LMArena Coding | 1322 | 1309 |

## Reasoning

- Mercury: 17.5 (#293)
- Mistral Small 3.1: 19.7 (#254)

| Benchmark | Mercury | Mistral Small 3.1 |
|---|---|---|
| LMArena Hard Prompts | 1285 | 1278 |
| Kagi LLM Benchmark | 21.6% | — |
| Chess Puzzles | — | 1% |
| Epoch Capabilities Index | — | 127.48 |

## Math

- Mercury: —
- Mistral Small 3.1: 14.7 (#301)

| Benchmark | Mercury | Mistral Small 3.1 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 3.9% |
| Omni-MATH | — | 24.8% |
| LMArena Math | — | 1262 |

## Knowledge

- Mercury: —
- Mistral Small 3.1: 22.6 (#271)

| Benchmark | Mercury | Mistral Small 3.1 |
|---|---|---|
| GPQA Diamond | — | 41.9% |
| MMLU-Pro | — | 61% |
| GPQA (HELM) | — | 39.2% |
| LMArena Expert | — | 1257 |

## Multimodal

- Mercury: —
- Mistral Small 3.1: 33.2 (#99)

| Benchmark | Mercury | Mistral Small 3.1 |
|---|---|---|
| LMArena Vision | — | 1136 |

## Multilingual

- Mercury: 41.6 (#206)
- Mistral Small 3.1: 41.2 (#209)

| Benchmark | Mercury | Mistral Small 3.1 |
|---|---|---|
| LMArena Non-English | 1260 | 1255 |
| LMArena Chinese | — | 1253 |
| LMArena French | — | 1273 |
| LMArena German | — | 1266 |
| LMArena Japanese | — | 1208 |
| LMArena Korean | — | 1206 |
| LMArena Russian | — | 1263 |
| LMArena Spanish | — | 1283 |

## Instruction Following

- Mercury: 65.2 (#224)
- Mistral Small 3.1: 63.6 (#230)

| Benchmark | Mercury | Mistral Small 3.1 |
|---|---|---|
| LMArena Instruction Following | 1239 | 1264 |
| IFEval | — | 75% |

## Long Context

- Mercury: 38.4 (#198)
- Mistral Small 3.1: 39.5 (#178)

| Benchmark | Mercury | Mistral Small 3.1 |
|---|---|---|
| LMArena Longer Query | 1266 | 1299 |

## Writing & Preference

- Mercury: 46.2 (#221)
- Mistral Small 3.1: 37.0 (#259)

| Benchmark | Mercury | Mistral Small 3.1 |
|---|---|---|
| LMArena Text | 1282 | 1277 |
| LMArena Creative Writing | 1191 | 1253 |
| LMArena Multi-Turn | 1282 | 1270 |
| EQ-Bench Creative Writing | — | 761 |
| WildBench | — | 78.8% |

## FAQ

### Is Mercury better than Mistral Small 3.1?

Mercury is the stronger model overall, scoring 37.6 to 31.7 on the Noometry Index.

### Is Mercury or Mistral Small 3.1 better for coding?

They score almost the same on coding (38.7 vs 38.3); test both on your own repository before choosing.

### How many benchmarks do Mercury and Mistral Small 3.1 share?

8 benchmarks have published results for both models. Mercury has 9 scored results on Noometry and Mistral Small 3.1 has 28.