# Mercury 2 vs Mistral Medium 3.1

> Mercury 2 is the stronger model overall, scoring 38.8 to 31.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/mercury-2-vs-mistral-medium-3-1
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in reasoning, where Mercury 2 leads 23.0 to 10.1.
- Mercury 2 is cheaper at $0.25 / $0.75 per million input/output tokens, against $0.40 / $2 for Mistral Medium 3.1.
- Mistral Medium 3.1 accepts more context: 131K tokens versus 128K.

## Snapshot

| | Mercury 2 | Mistral Medium 3.1 |
|---|---|---|
| Provider | Inception | Mistral AI |
| Noometry Index | 38.8 | 31.5 |
| Rank | 167 | 260 |
| Context | 128K | 131K |
| Input $/M | $0.25 | $0.40 |
| Output $/M | $0.75 | $2 |
| Weights | Proprietary | Proprietary |

## Coding

- Mercury 2: 33.2 (#250)
- Mistral Medium 3.1: —

| Benchmark | Mercury 2 | Mistral Medium 3.1 |
|---|---|---|
| LMArena WebDev | 1170 | — |
| SciCode | 38.7% | — |
| WeirdML | 43.2% | — |
| LMArena Coding | 1391 | — |
| ALE-Bench | 785.58 | — |

## Reasoning

- Mercury 2: 23.0 (#170)
- Mistral Medium 3.1: 10.1 (#336)

| Benchmark | Mercury 2 | Mistral Medium 3.1 |
|---|---|---|
| NYT Connections (extended) | — | 6.5% |
| CritPt | 0.8% | — |
| Thematic Generalization | — | 20.3% |
| LMArena Hard Prompts | 1362 | — |

## Knowledge

- Mercury 2: 35.6 (#170)
- Mistral Medium 3.1: —

| Benchmark | Mercury 2 | Mistral Medium 3.1 |
|---|---|---|
| Vectara Hallucination Rate | 12.3% | — |
| LMArena Expert | 1358 | — |

## Multilingual

- Mercury 2: 46.8 (#153)
- Mistral Medium 3.1: —

| Benchmark | Mercury 2 | Mistral Medium 3.1 |
|---|---|---|
| LMArena Non-English | 1331 | — |
| LMArena Chinese | 1416 | — |
| LMArena Russian | 1303 | — |

## Instruction Following

- Mercury 2: 70.4 (#161)
- Mistral Medium 3.1: —

| Benchmark | Mercury 2 | Mistral Medium 3.1 |
|---|---|---|
| LMArena Instruction Following | 1328 | — |

## Long Context

- Mercury 2: 40.4 (#149)
- Mistral Medium 3.1: —

| Benchmark | Mercury 2 | Mistral Medium 3.1 |
|---|---|---|
| LMArena Longer Query | 1329 | — |

## Writing & Preference

- Mercury 2: 54.0 (#151)
- Mistral Medium 3.1: 55.6 (#140)

| Benchmark | Mercury 2 | Mistral Medium 3.1 |
|---|---|---|
| LMArena Text | 1355 | — |
| LMArena Creative Writing | 1289 | — |
| EQ-Bench Creative Writing | — | 1476 |
| LMArena Multi-Turn | 1358 | — |

## FAQ

### Is Mercury 2 better than Mistral Medium 3.1?

Mercury 2 is the stronger model overall, scoring 38.8 to 31.5 on the Noometry Index.

### Which is cheaper, Mercury 2 or Mistral Medium 3.1?

Mercury 2 is cheaper. It lists at $0.25 per million input tokens and $0.75 per million output tokens; Mistral Medium 3.1 lists at $0.40 and $2.

### Which has the bigger context window?

Mistral Medium 3.1 does, with 131K tokens against 128K.

### How many benchmarks do Mercury 2 and Mistral Medium 3.1 share?

0 benchmarks have published results for both models. Mercury 2 has 17 scored results on Noometry and Mistral Medium 3.1 has 3.