# Step 3.5 Flash vs Step 3.7 Flash

> Step 3.5 Flash is the stronger model overall, scoring 42.3 to 37.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/step-3-5-flash-vs-step-3-7-flash
- Last updated: 2026-10-10
- Shared benchmarks: 2

## Summary

- They share 2 benchmarks with published results for both. Step 3.5 Flash scores higher in 2 categories and Step 3.7 Flash in 1 category; one gap is clear of the uncertainty.
- The biggest single-benchmark swing is NYT Connections (extended): 28.4% for Step 3.5 Flash and 39.7% for Step 3.7 Flash.
- Step 3.5 Flash is cheaper at $0.10 / $0.30 per million input/output tokens, against $0.18 / $1.11 for Step 3.7 Flash.

## Snapshot

| | Step 3.5 Flash | Step 3.7 Flash |
|---|---|---|
| Provider | StepFun | StepFun |
| Noometry Index | 42.3 | 37.3 |
| Rank | 116 | 207 |
| Context | 256K | 256K |
| Input $/M | $0.10 | $0.18 |
| Output $/M | $0.30 | $1.11 |
| Weights | Open | Open |

## Coding

- Step 3.5 Flash: 42.4 (#105)
- Step 3.7 Flash: 40.0 (#150)

| Benchmark | Step 3.5 Flash | Step 3.7 Flash |
|---|---|---|
| SciCode | — | 40% |
| LMArena Coding | 1436 | — |
| ALE-Bench | — | 694.12 |

## Reasoning

- Step 3.5 Flash: 22.2 (#202)
- Step 3.7 Flash: 21.6 (#219)

| Benchmark | Step 3.5 Flash | Step 3.7 Flash |
|---|---|---|
| NYT Connections (extended) | 28.4% | 39.7% |
| CritPt | — | 2.3% |
| LMArena Hard Prompts | 1411 | — |

## Math

- Step 3.5 Flash: 42.6 (#84)
- Step 3.7 Flash: 42.9 (#82)

| Benchmark | Step 3.5 Flash | Step 3.7 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | 66.8% | 68.5% |
| LMArena Math | 1408 | — |

## Knowledge

- Step 3.5 Flash: 39.6 (#132)
- Step 3.7 Flash: —

| Benchmark | Step 3.5 Flash | Step 3.7 Flash |
|---|---|---|
| LMArena Expert | 1421 | — |

## Multilingual

- Step 3.5 Flash: 50.5 (#119)
- Step 3.7 Flash: —

| Benchmark | Step 3.5 Flash | Step 3.7 Flash |
|---|---|---|
| LMArena Non-English | 1385 | — |
| LMArena Chinese | 1447 | — |
| LMArena French | 1421 | — |
| LMArena German | 1405 | — |
| LMArena Japanese | 1354 | — |
| LMArena Korean | 1352 | — |
| LMArena Russian | 1385 | — |
| LMArena Spanish | 1419 | — |

## Instruction Following

- Step 3.5 Flash: 73.1 (#124)
- Step 3.7 Flash: —

| Benchmark | Step 3.5 Flash | Step 3.7 Flash |
|---|---|---|
| LMArena Instruction Following | 1385 | — |

## Long Context

- Step 3.5 Flash: 42.8 (#117)
- Step 3.7 Flash: —

| Benchmark | Step 3.5 Flash | Step 3.7 Flash |
|---|---|---|
| LMArena Longer Query | 1402 | — |

## Writing & Preference

- Step 3.5 Flash: 58.8 (#113)
- Step 3.7 Flash: —

| Benchmark | Step 3.5 Flash | Step 3.7 Flash |
|---|---|---|
| LMArena Text | 1403 | — |
| LMArena Creative Writing | 1357 | — |
| LMArena Multi-Turn | 1405 | — |

## FAQ

### Is Step 3.5 Flash better than Step 3.7 Flash?

Step 3.5 Flash is the stronger model overall, scoring 42.3 to 37.3 on the Noometry Index.

### Which is cheaper, Step 3.5 Flash or Step 3.7 Flash?

Step 3.5 Flash is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; Step 3.7 Flash lists at $0.18 and $1.11.

### Is Step 3.5 Flash or Step 3.7 Flash better for coding?

Step 3.5 Flash scores higher on coding benchmarks: 42.4 versus 40.0 in the Noometry coding category.

### Which has the bigger context window?

Both accept 256K tokens.

### How many benchmarks do Step 3.5 Flash and Step 3.7 Flash share?

2 benchmarks have published results for both models. Step 3.5 Flash has 19 scored results on Noometry and Step 3.7 Flash has 5.