# Mercury 2.5 vs Mistral Medium

> Mistral Medium is the stronger model overall, scoring 36.3 to 33.5 on the Noometry Index. Mercury 2.5 costs 44× less per token, which makes it the better buy when Mistral Medium's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/mercury-2-5-vs-mistral-medium
- Last updated: 2026-10-11
- Shared benchmarks: 4

## Summary

- They share 4 benchmarks with published results for both. Mercury 2.5 scores higher in 1 category and Mistral Medium in 2 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in coding, where Mercury 2.5 leads 39.5 to 34.2.
- The biggest single-benchmark swing is ProofBench: 3% for Mercury 2.5 and 9% for Mistral Medium.
- Mercury 2.5 is cheaper at $0.04 / $0.15 per million input/output tokens, against $1.50 / $7.50 for Mistral Medium.
- Mistral Medium accepts more context: 262K tokens versus 260K.
- Mistral Medium has downloadable open weights; the other is API-only.

## Snapshot

| | Mercury 2.5 | Mistral Medium |
|---|---|---|
| Provider | Inception | Mistral AI |
| Noometry Index | 33.5 | 36.3 |
| Rank | 242 | 218 |
| Context | 260K | 262K |
| Input $/M | $0.04 | $1.50 |
| Output $/M | $0.15 | $7.50 |
| Weights | Proprietary | Open |

## Coding

- Mercury 2.5: 39.5 (#156)
- Mistral Medium: 34.2 (#243)

| Benchmark | Mercury 2.5 | Mistral Medium |
|---|---|---|
| SciCode | 38.5% | 40.2% |
| ALE-Bench | 301.65 | 763.98 |
| FrontierCode | — | 8% |
| WeirdML | — | 43.7% |
| LMArena Coding | — | 1434 |

## Agentic & Tool Use

- Mercury 2.5: —
- Mistral Medium: 28.3 (#90)

| Benchmark | Mercury 2.5 | Mistral Medium |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 37.7% |

## Reasoning

- Mercury 2.5: 22.4 (#193)
- Mistral Medium: 24.0 (#167)

| Benchmark | Mercury 2.5 | Mistral Medium |
|---|---|---|
| CritPt | 0% | 0% |
| Kagi LLM Benchmark | — | 50% |
| LMArena Hard Prompts | — | 1426 |
| DTBench | — | 75.5% |
| LMCA | — | 26.1% |
| Surface Evolver Bench | — | 26.9% |

## Math

- Mercury 2.5: 23.3 (#272)
- Mistral Medium: 28.1 (#245)

| Benchmark | Mercury 2.5 | Mistral Medium |
|---|---|---|
| ProofBench | 3% | 9% |
| OTIS Mock AIME 2024-2025 | — | 32.2% |
| LMArena Math | — | 1408 |
| MATH Level 5 | — | 81.6% |
| FrontierMath (Feb 2025 set) | — | 0.3% |

## Knowledge

- Mercury 2.5: —
- Mistral Medium: 25.0 (#265)

| Benchmark | Mercury 2.5 | Mistral Medium |
|---|---|---|
| GPQA Diamond | — | 59.5% |
| Humanity's Last Exam | — | 4.5% |
| Vectara Hallucination Rate | — | 22.7% |
| LMArena Expert | — | 1408 |

## Multimodal

- Mercury 2.5: —
- Mistral Medium: 35.3 (#88)

| Benchmark | Mercury 2.5 | Mistral Medium |
|---|---|---|
| LMArena Vision | — | 1172 |

## Multilingual

- Mercury 2.5: —
- Mistral Medium: 52.1 (#91)

| Benchmark | Mercury 2.5 | Mistral Medium |
|---|---|---|
| LMArena Non-English | — | 1408 |
| LMArena Chinese | — | 1447 |
| LMArena French | — | 1459 |
| LMArena German | — | 1432 |
| LMArena Japanese | — | 1378 |
| LMArena Korean | — | 1380 |
| LMArena Russian | — | 1411 |
| LMArena Spanish | — | 1433 |

## Instruction Following

- Mercury 2.5: —
- Mistral Medium: 73.7 (#116)

| Benchmark | Mercury 2.5 | Mistral Medium |
|---|---|---|
| LMArena Instruction Following | — | 1398 |

## Long Context

- Mercury 2.5: —
- Mistral Medium: 42.9 (#114)

| Benchmark | Mercury 2.5 | Mistral Medium |
|---|---|---|
| LMArena Longer Query | — | 1406 |

## Writing & Preference

- Mercury 2.5: —
- Mistral Medium: 60.0 (#103)

| Benchmark | Mercury 2.5 | Mistral Medium |
|---|---|---|
| LMArena Text | — | 1424 |
| LMArena Creative Writing | — | 1391 |
| Short-Story Creative Writing | — | 77.3% |
| LMArena Multi-Turn | — | 1418 |

## FAQ

### Is Mercury 2.5 better than Mistral Medium?

Mistral Medium is the stronger model overall, scoring 36.3 to 33.5 on the Noometry Index. Mercury 2.5 costs 44× less per token, which makes it the better buy when Mistral Medium's lead doesn't matter for your workload.

### Which is cheaper, Mercury 2.5 or Mistral Medium?

Mercury 2.5 is cheaper. It lists at $0.04 per million input tokens and $0.15 per million output tokens; Mistral Medium lists at $1.50 and $7.50.

### Is Mercury 2.5 or Mistral Medium better for coding?

Mercury 2.5 scores higher on coding benchmarks: 39.5 versus 34.2 in the Noometry coding category.

### Which has the bigger context window?

Mistral Medium does, with 262K tokens against 260K.

### How many benchmarks do Mercury 2.5 and Mistral Medium share?

4 benchmarks have published results for both models. Mercury 2.5 has 4 scored results on Noometry and Mistral Medium has 36.