# Mistral vs Step 3.5 Flash

> Step 3.5 Flash is the stronger model overall, scoring 42.3 to 29.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/mistral-vs-step-3-5-flash
- Last updated: 2026-10-12
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Mistral scores higher in 1 category and Step 3.5 Flash in 7 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Step 3.5 Flash leads 39.6 to 16.6.
- Step 3.5 Flash has downloadable open weights; the other is API-only.

## Snapshot

| | Mistral | Step 3.5 Flash |
|---|---|---|
| Provider | Mistral AI | StepFun |
| Noometry Index | 29.9 | 42.3 |
| Rank | 303 | 116 |
| Context | — | 256K |
| Input $/M | — | $0.10 |
| Output $/M | — | $0.30 |
| Weights | Proprietary | Open |

## Coding

- Mistral: 33.8 (#250)
- Step 3.5 Flash: 42.4 (#105)

| Benchmark | Mistral | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | 1162 | 1436 |

## Reasoning

- Mistral: 22.2 (#200)
- Step 3.5 Flash: 22.2 (#202)

| Benchmark | Mistral | Step 3.5 Flash |
|---|---|---|
| LMArena Hard Prompts | 1149 | 1411 |
| NYT Connections (extended) | — | 28.4% |

## Math

- Mistral: 22.3 (#278)
- Step 3.5 Flash: 42.6 (#84)

| Benchmark | Mistral | Step 3.5 Flash |
|---|---|---|
| LMArena Math | 1180 | 1408 |
| MathArena Final-Answer Competitions | — | 66.8% |
| Omni-MATH | 7.2% | — |

## Knowledge

- Mistral: 16.6 (#288)
- Step 3.5 Flash: 39.6 (#132)

| Benchmark | Mistral | Step 3.5 Flash |
|---|---|---|
| LMArena Expert | 1125 | 1421 |
| MMLU-Pro | 27.7% | — |
| GPQA (HELM) | 30.3% | — |

## Multilingual

- Mistral: 32.8 (#254)
- Step 3.5 Flash: 50.5 (#119)

| Benchmark | Mistral | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | 1129 | 1385 |
| LMArena Chinese | 1109 | 1447 |
| LMArena French | 1180 | 1421 |
| LMArena German | 1155 | 1405 |
| LMArena Japanese | 1013 | 1354 |
| LMArena Korean | 1032 | 1352 |
| LMArena Russian | 1168 | 1385 |
| LMArena Spanish | 1143 | 1419 |

## Instruction Following

- Mistral: 52.6 (#288)
- Step 3.5 Flash: 73.1 (#124)

| Benchmark | Mistral | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1152 | 1385 |
| IFEval | 56.8% | — |

## Long Context

- Mistral: 35.0 (#245)
- Step 3.5 Flash: 42.8 (#117)

| Benchmark | Mistral | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | 1153 | 1402 |

## Writing & Preference

- Mistral: 37.0 (#260)
- Step 3.5 Flash: 58.8 (#113)

| Benchmark | Mistral | Step 3.5 Flash |
|---|---|---|
| LMArena Text | 1165 | 1403 |
| LMArena Creative Writing | 1158 | 1357 |
| LMArena Multi-Turn | 1147 | 1405 |
| WildBench | 66% | — |

## FAQ

### Is Mistral better than Step 3.5 Flash?

Step 3.5 Flash is the stronger model overall, scoring 42.3 to 29.9 on the Noometry Index.

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

Step 3.5 Flash scores higher on coding benchmarks: 42.4 versus 33.8 in the Noometry coding category.

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

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