# Mistral Small 3.1 vs Step 3.7 Flash

> Step 3.7 Flash is the stronger model overall, scoring 36.5 to 31.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/mistral-small-3-1-vs-step-3-7-flash
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Step 3.7 Flash leads 40.9 to 13.7.
- Both cost about the same: $0.35 input and $0.56 output per million tokens.
- Step 3.7 Flash accepts more context: 256K tokens versus 128K.

## Snapshot

| | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| Provider | Mistral AI | StepFun |
| Noometry Index | 31.4 | 36.5 |
| Rank | 263 | 207 |
| Context | 128K | 256K |
| Input $/M | $0.35 | $0.18 |
| Output $/M | $0.56 | $1.11 |
| Weights | Open | Open |

## Coding

- Mistral Small 3.1: 37.7 (#175)
- Step 3.7 Flash: 39.4 (#147)

| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| SciCode | — | 40% |
| LMArena Coding | 1309 | — |
| ALE-Bench | — | 694.12 |

## Reasoning

- Mistral Small 3.1: 18.9 (#249)
- Step 3.7 Flash: 20.9 (#211)

| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| NYT Connections (extended) | — | 39.7% |
| CritPt | — | 2.3% |
| Chess Puzzles | 1% | — |
| LMArena Hard Prompts | 1278 | — |
| Epoch Capabilities Index | 127.48 | — |

## Math

- Mistral Small 3.1: 13.7 (#295)
- Step 3.7 Flash: 40.9 (#74)

| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 68.5% |
| OTIS Mock AIME 2024-2025 | 3.9% | — |
| Omni-MATH | 24.8% | — |
| LMArena Math | 1261 | — |

## Knowledge

- Mistral Small 3.1: 22.6 (#266)
- Step 3.7 Flash: —

| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| GPQA Diamond | 41.9% | — |
| MMLU-Pro | 61% | — |
| GPQA (HELM) | 39.2% | — |
| LMArena Expert | 1258 | — |

## Multimodal

- Mistral Small 3.1: 32.6 (#93)
- Step 3.7 Flash: —

| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| LMArena Vision | 1136 | — |

## Multilingual

- Mistral Small 3.1: 41.4 (#204)
- Step 3.7 Flash: —

| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| LMArena Non-English | 1255 | — |
| LMArena Chinese | 1254 | — |
| LMArena French | 1270 | — |
| LMArena German | 1266 | — |
| LMArena Japanese | 1210 | — |
| LMArena Korean | 1206 | — |
| LMArena Russian | 1263 | — |
| LMArena Spanish | 1283 | — |

## Instruction Following

- Mistral Small 3.1: 63.8 (#225)
- Step 3.7 Flash: —

| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| IFEval | 75% | — |
| LMArena Instruction Following | 1264 | — |

## Long Context

- Mistral Small 3.1: 39.5 (#172)
- Step 3.7 Flash: —

| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| LMArena Longer Query | 1300 | — |

## Writing & Preference

- Mistral Small 3.1: 37.2 (#254)
- Step 3.7 Flash: —

| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| LMArena Text | 1278 | — |
| LMArena Creative Writing | 1253 | — |
| EQ-Bench Creative Writing | 761 | — |
| WildBench | 78.8% | — |
| LMArena Multi-Turn | 1270 | — |

## FAQ

### Is Mistral Small 3.1 better than Step 3.7 Flash?

Step 3.7 Flash is the stronger model overall, scoring 36.5 to 31.4 on the Noometry Index.

### Which is cheaper, Mistral Small 3.1 or Step 3.7 Flash?

Mistral Small 3.1 is cheaper. It lists at $0.35 per million input tokens and $0.56 per million output tokens; Step 3.7 Flash lists at $0.18 and $1.11.

### Is Mistral Small 3.1 or Step 3.7 Flash better for coding?

Step 3.7 Flash scores higher on coding benchmarks: 39.4 versus 37.7 in the Noometry coding category.

### Which has the bigger context window?

Step 3.7 Flash does, with 256K tokens against 128K.

### How many benchmarks do Mistral Small 3.1 and Step 3.7 Flash share?

0 benchmarks have published results for both models. Mistral Small 3.1 has 28 scored results on Noometry and Step 3.7 Flash has 5.