# Mistral Large 4 vs Step 3.5 Flash

> Mistral Large 4 and Step 3.5 Flash score almost the same on the Noometry Index (43.1 vs 42.3), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/mistral-large-4-vs-step-3-5-flash
- Last updated: 2026-10-11
- Shared benchmarks: 13

## Summary

- They share 13 benchmarks with published results for both. Mistral Large 4 scores higher in 6 categories and Step 3.5 Flash in 2 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in coding, where Mistral Large 4 leads 48.6 to 42.4.
- Step 3.5 Flash is cheaper at $0.10 / $0.30 per million input/output tokens, against $0.68 / $2.09 for Mistral Large 4.
- Mistral Large 4 accepts more context: 1.05M tokens versus 256K.
- Step 3.5 Flash has downloadable open weights; the other is API-only.

## Snapshot

| | Mistral Large 4 | Step 3.5 Flash |
|---|---|---|
| Provider | Mistral AI | StepFun |
| Noometry Index | 43.1 | 42.3 |
| Rank | 99 | 116 |
| Context | 1.05M | 256K |
| Input $/M | $0.68 | $0.10 |
| Output $/M | $2.09 | $0.30 |
| Weights | Proprietary | Open |

## Coding

- Mistral Large 4: 48.6 (#57)
- Step 3.5 Flash: 42.4 (#105)

| Benchmark | Mistral Large 4 | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | 1475 | 1436 |
| LMArena WebDev | 1541 | — |

## Reasoning

- Mistral Large 4: 22.5 (#192)
- Step 3.5 Flash: 22.2 (#202)

| Benchmark | Mistral Large 4 | Step 3.5 Flash |
|---|---|---|
| NYT Connections (extended) | 27.4% | 28.4% |
| LMArena Hard Prompts | 1444 | 1411 |

## Math

- Mistral Large 4: 40.4 (#91)
- Step 3.5 Flash: 42.6 (#84)

| Benchmark | Mistral Large 4 | Step 3.5 Flash |
|---|---|---|
| LMArena Math | 1488 | 1408 |
| MathArena Final-Answer Competitions | — | 66.8% |

## Knowledge

- Mistral Large 4: 36.6 (#166)
- Step 3.5 Flash: 39.6 (#132)

| Benchmark | Mistral Large 4 | Step 3.5 Flash |
|---|---|---|
| LMArena Expert | 1447 | 1421 |
| SimpleQA Verified | 20% | — |

## Multilingual

- Mistral Large 4: 52.6 (#82)
- Step 3.5 Flash: 50.5 (#119)

| Benchmark | Mistral Large 4 | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | 1415 | 1385 |
| LMArena Chinese | 1491 | 1447 |
| LMArena Russian | 1414 | 1385 |
| LMArena French | — | 1421 |
| LMArena German | — | 1405 |
| LMArena Japanese | — | 1354 |
| LMArena Korean | — | 1352 |
| LMArena Spanish | — | 1419 |

## Instruction Following

- Mistral Large 4: 75.0 (#76)
- Step 3.5 Flash: 73.1 (#124)

| Benchmark | Mistral Large 4 | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1424 | 1385 |

## Long Context

- Mistral Large 4: 43.6 (#89)
- Step 3.5 Flash: 42.8 (#117)

| Benchmark | Mistral Large 4 | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | 1429 | 1402 |

## Writing & Preference

- Mistral Large 4: 60.4 (#97)
- Step 3.5 Flash: 58.8 (#113)

| Benchmark | Mistral Large 4 | Step 3.5 Flash |
|---|---|---|
| LMArena Text | 1427 | 1403 |
| LMArena Creative Writing | 1361 | 1357 |
| LMArena Multi-Turn | 1424 | 1405 |

## FAQ

### Is Mistral Large 4 better than Step 3.5 Flash?

Mistral Large 4 and Step 3.5 Flash score almost the same on the Noometry Index (43.1 vs 42.3), so choose on price, context window or the category you care about most.

### Which is cheaper, Mistral Large 4 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 Large 4 lists at $0.68 and $2.09.

### Is Mistral Large 4 or Step 3.5 Flash better for coding?

Mistral Large 4 scores higher on coding benchmarks: 48.6 versus 42.4 in the Noometry coding category.

### Which has the bigger context window?

Mistral Large 4 does, with 1.05M tokens against 256K.

### How many benchmarks do Mistral Large 4 and Step 3.5 Flash share?

13 benchmarks have published results for both models. Mistral Large 4 has 15 scored results on Noometry and Step 3.5 Flash has 19.