# Mistral Medium 3.5 vs Solar Pro4

> Solar Pro4 is the stronger model overall, scoring 42.1 to 40.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/mistral-medium-3-5-vs-solar-pro4
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Mistral Medium 3.5 scores higher in 6 categories and Solar Pro4 in 2 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Solar Pro4 leads 28.5 to 17.3.
- Solar Pro4 is cheaper at $0.30 / $1.20 per million input/output tokens, against $1.50 / $7.50 for Mistral Medium 3.5.
- Solar Pro4 accepts more context: 524K tokens versus 262K.
- Mistral Medium 3.5 has downloadable open weights; the other is API-only.

## Snapshot

| | Mistral Medium 3.5 | Solar Pro4 |
|---|---|---|
| Provider | Mistral AI | Upstage |
| Noometry Index | 40.2 | 42.1 |
| Rank | 152 | 121 |
| Context | 262K | 524K |
| Input $/M | $1.50 | $0.30 |
| Output $/M | $7.50 | $1.20 |
| Weights | Open | Proprietary |

## Coding

- Mistral Medium 3.5: 36.0 (#213)
- Solar Pro4: 40.1 (#149)

| Benchmark | Mistral Medium 3.5 | Solar Pro4 |
|---|---|---|
| LMArena WebDev | 1264 | 1371 |
| LMArena Coding | 1461 | 1437 |

## Reasoning

- Mistral Medium 3.5: 17.3 (#295)
- Solar Pro4: 28.5 (#104)

| Benchmark | Mistral Medium 3.5 | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1436 | 1399 |
| Kagi LLM Benchmark | 41.4% | — |
| NYT Connections (extended) | 12.9% | — |
| Epoch Capabilities Index | 141.35 | — |

## Math

- Mistral Medium 3.5: 39.1 (#113)
- Solar Pro4: 38.8 (#128)

| Benchmark | Mistral Medium 3.5 | Solar Pro4 |
|---|---|---|
| LMArena Math | 1431 | 1416 |

## Knowledge

- Mistral Medium 3.5: 40.0 (#126)
- Solar Pro4: 39.8 (#129)

| Benchmark | Mistral Medium 3.5 | Solar Pro4 |
|---|---|---|
| LMArena Expert | 1432 | 1427 |

## Multimodal

- Mistral Medium 3.5: 38.3 (#65)
- Solar Pro4: —

| Benchmark | Mistral Medium 3.5 | Solar Pro4 |
|---|---|---|
| LMArena Vision | 1223 | — |

## Multilingual

- Mistral Medium 3.5: 51.9 (#100)
- Solar Pro4: 48.7 (#139)

| Benchmark | Mistral Medium 3.5 | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1404 | 1361 |
| LMArena Chinese | 1442 | 1415 |
| LMArena French | 1448 | 1397 |
| LMArena German | 1451 | 1364 |
| LMArena Korean | 1385 | 1382 |
| LMArena Russian | 1395 | 1360 |
| LMArena Spanish | 1409 | 1401 |
| LMArena Japanese | — | 1309 |

## Instruction Following

- Mistral Medium 3.5: 74.6 (#90)
- Solar Pro4: 72.7 (#132)

| Benchmark | Mistral Medium 3.5 | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1415 | 1377 |

## Long Context

- Mistral Medium 3.5: 43.2 (#103)
- Solar Pro4: 42.1 (#130)

| Benchmark | Mistral Medium 3.5 | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | 1415 | 1381 |

## Writing & Preference

- Mistral Medium 3.5: 58.5 (#117)
- Solar Pro4: 56.5 (#138)

| Benchmark | Mistral Medium 3.5 | Solar Pro4 |
|---|---|---|
| LMArena Text | 1421 | 1386 |
| LMArena Creative Writing | 1374 | 1316 |
| LMArena Multi-Turn | 1423 | 1385 |
| EQ-Bench 4 | 993 | — |

## FAQ

### Is Mistral Medium 3.5 better than Solar Pro4?

Solar Pro4 is the stronger model overall, scoring 42.1 to 40.2 on the Noometry Index.

### Which is cheaper, Mistral Medium 3.5 or Solar Pro4?

Solar Pro4 is cheaper. It lists at $0.30 per million input tokens and $1.20 per million output tokens; Mistral Medium 3.5 lists at $1.50 and $7.50.

### Is Mistral Medium 3.5 or Solar Pro4 better for coding?

Solar Pro4 scores higher on coding benchmarks: 40.1 versus 36.0 in the Noometry coding category.

### Which has the bigger context window?

Solar Pro4 does, with 524K tokens against 262K.

### How many benchmarks do Mistral Medium 3.5 and Solar Pro4 share?

17 benchmarks have published results for both models. Mistral Medium 3.5 has 22 scored results on Noometry and Solar Pro4 has 18.