# Mistral Medium 3.5 vs Step 3.5 Flash

> Step 3.5 Flash is the stronger model overall, scoring 42.3 to 40.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/mistral-medium-3-5-vs-step-3-5-flash
- 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 4 categories and Step 3.5 Flash in 4 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in coding, where Step 3.5 Flash leads 42.4 to 36.0.
- The biggest single-benchmark swing is NYT Connections (extended): 12.9% for Mistral Medium 3.5 and 28.4% for Step 3.5 Flash.
- Step 3.5 Flash is cheaper at $0.10 / $0.30 per million input/output tokens, against $1.50 / $7.50 for Mistral Medium 3.5.
- Mistral Medium 3.5 accepts more context: 262K tokens versus 256K.

## Snapshot

| | Mistral Medium 3.5 | Step 3.5 Flash |
|---|---|---|
| Provider | Mistral AI | StepFun |
| Noometry Index | 40.2 | 42.3 |
| Rank | 152 | 116 |
| Context | 262K | 256K |
| Input $/M | $1.50 | $0.10 |
| Output $/M | $7.50 | $0.30 |
| Weights | Open | Open |

## Coding

- Mistral Medium 3.5: 36.0 (#213)
- Step 3.5 Flash: 42.4 (#105)

| Benchmark | Mistral Medium 3.5 | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | 1461 | 1436 |
| LMArena WebDev | 1264 | — |

## Reasoning

- Mistral Medium 3.5: 17.3 (#295)
- Step 3.5 Flash: 22.2 (#202)

| Benchmark | Mistral Medium 3.5 | Step 3.5 Flash |
|---|---|---|
| NYT Connections (extended) | 12.9% | 28.4% |
| LMArena Hard Prompts | 1436 | 1411 |
| Kagi LLM Benchmark | 41.4% | — |
| Epoch Capabilities Index | 141.35 | — |

## Math

- Mistral Medium 3.5: 39.1 (#113)
- Step 3.5 Flash: 42.6 (#84)

| Benchmark | Mistral Medium 3.5 | Step 3.5 Flash |
|---|---|---|
| LMArena Math | 1431 | 1408 |
| MathArena Final-Answer Competitions | — | 66.8% |

## Knowledge

- Mistral Medium 3.5: 40.0 (#126)
- Step 3.5 Flash: 39.6 (#132)

| Benchmark | Mistral Medium 3.5 | Step 3.5 Flash |
|---|---|---|
| LMArena Expert | 1432 | 1421 |

## Multimodal

- Mistral Medium 3.5: 38.3 (#65)
- Step 3.5 Flash: —

| Benchmark | Mistral Medium 3.5 | Step 3.5 Flash |
|---|---|---|
| LMArena Vision | 1223 | — |

## Multilingual

- Mistral Medium 3.5: 51.9 (#100)
- Step 3.5 Flash: 50.5 (#119)

| Benchmark | Mistral Medium 3.5 | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | 1404 | 1385 |
| LMArena Chinese | 1442 | 1447 |
| LMArena French | 1448 | 1421 |
| LMArena German | 1451 | 1405 |
| LMArena Korean | 1385 | 1352 |
| LMArena Russian | 1395 | 1385 |
| LMArena Spanish | 1409 | 1419 |
| LMArena Japanese | — | 1354 |

## Instruction Following

- Mistral Medium 3.5: 74.6 (#90)
- Step 3.5 Flash: 73.1 (#124)

| Benchmark | Mistral Medium 3.5 | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1415 | 1385 |

## Long Context

- Mistral Medium 3.5: 43.2 (#103)
- Step 3.5 Flash: 42.8 (#117)

| Benchmark | Mistral Medium 3.5 | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | 1415 | 1402 |

## Writing & Preference

- Mistral Medium 3.5: 58.5 (#117)
- Step 3.5 Flash: 58.8 (#113)

| Benchmark | Mistral Medium 3.5 | Step 3.5 Flash |
|---|---|---|
| LMArena Text | 1421 | 1403 |
| LMArena Creative Writing | 1374 | 1357 |
| LMArena Multi-Turn | 1423 | 1405 |
| EQ-Bench 4 | 993 | — |

## FAQ

### Is Mistral Medium 3.5 better than Step 3.5 Flash?

Step 3.5 Flash is the stronger model overall, scoring 42.3 to 40.2 on the Noometry Index.

### Which is cheaper, Mistral Medium 3.5 or Step 3.5 Flash?

Step 3.5 Flash is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; Mistral Medium 3.5 lists at $1.50 and $7.50.

### Is Mistral Medium 3.5 or Step 3.5 Flash better for coding?

Step 3.5 Flash scores higher on coding benchmarks: 42.4 versus 36.0 in the Noometry coding category.

### Which has the bigger context window?

Mistral Medium 3.5 does, with 262K tokens against 256K.

### How many benchmarks do Mistral Medium 3.5 and Step 3.5 Flash share?

17 benchmarks have published results for both models. Mistral Medium 3.5 has 22 scored results on Noometry and Step 3.5 Flash has 19.