# Qwen3.5 27B vs Step 3.7 Flash

> Qwen3.5 27B is the stronger model overall, scoring 41.4 to 36.5 on the Noometry Index. Step 3.7 Flash costs 2.0× less per token, which makes it the better buy when Qwen3.5 27B's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/qwen3-5-27b-vs-step-3-7-flash
- Last updated: 2026-10-10
- Shared benchmarks: 3

## Summary

- They share 3 benchmarks with published results for both. Qwen3.5 27B scores higher in 1 category and Step 3.7 Flash in 2 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Qwen3.5 27B leads 26.6 to 20.9.
- The biggest single-benchmark swing is MathArena Final-Answer Competitions: 56.7% for Qwen3.5 27B and 68.5% for Step 3.7 Flash.
- Step 3.7 Flash is cheaper at $0.18 / $1.11 per million input/output tokens, against $0.30 / $2.40 for Qwen3.5 27B.
- Qwen3.5 27B accepts more context: 262K tokens versus 256K.

## Snapshot

| | Qwen3.5 27B | Step 3.7 Flash |
|---|---|---|
| Provider | Alibaba (Qwen) | StepFun |
| Noometry Index | 41.4 | 36.5 |
| Rank | 127 | 207 |
| Context | 262K | 256K |
| Input $/M | $0.30 | $0.18 |
| Output $/M | $2.40 | $1.11 |
| Weights | Open | Open |

## Coding

- Qwen3.5 27B: 38.6 (#159)
- Step 3.7 Flash: 39.4 (#147)

| Benchmark | Qwen3.5 27B | Step 3.7 Flash |
|---|---|---|
| ALE-Bench | 349.45 | 694.12 |
| LMArena WebDev | 1357 | — |
| SciCode | — | 40% |
| WeirdML | 39.5% | — |
| LMArena Coding | 1427 | — |

## Agentic & Tool Use

- Qwen3.5 27B: —
- Step 3.7 Flash: —

| Benchmark | Qwen3.5 27B | Step 3.7 Flash |
|---|---|---|
| Vending-Bench 2 | 201.98 | — |

## Reasoning

- Qwen3.5 27B: 26.6 (#116)
- Step 3.7 Flash: 20.9 (#211)

| Benchmark | Qwen3.5 27B | Step 3.7 Flash |
|---|---|---|
| NYT Connections (extended) | 47.9% | 39.7% |
| CritPt | — | 2.3% |
| Thematic Generalization | 45.5% | — |
| LMArena Hard Prompts | 1414 | — |
| DTBench | 82.4% | — |
| LMCA | 34% | — |

## Math

- Qwen3.5 27B: 36.8 (#103)
- Step 3.7 Flash: 40.9 (#74)

| Benchmark | Qwen3.5 27B | Step 3.7 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | 56.7% | 68.5% |
| LMArena Math | 1428 | — |

## Knowledge

- Qwen3.5 27B: 37.4 (#149)
- Step 3.7 Flash: —

| Benchmark | Qwen3.5 27B | Step 3.7 Flash |
|---|---|---|
| Vectara Hallucination Rate | 12.1% | — |
| LMArena Expert | 1428 | — |

## Multimodal

- Qwen3.5 27B: 38.7 (#56)
- Step 3.7 Flash: —

| Benchmark | Qwen3.5 27B | Step 3.7 Flash |
|---|---|---|
| LMArena Vision | 1240 | — |

## Multilingual

- Qwen3.5 27B: 51.0 (#112)
- Step 3.7 Flash: —

| Benchmark | Qwen3.5 27B | Step 3.7 Flash |
|---|---|---|
| LMArena Non-English | 1390 | — |
| LMArena Chinese | 1478 | — |
| LMArena French | 1409 | — |
| LMArena German | 1393 | — |
| LMArena Japanese | 1345 | — |
| LMArena Korean | 1359 | — |
| LMArena Russian | 1389 | — |
| LMArena Spanish | 1408 | — |

## Instruction Following

- Qwen3.5 27B: 73.7 (#114)
- Step 3.7 Flash: —

| Benchmark | Qwen3.5 27B | Step 3.7 Flash |
|---|---|---|
| LMArena Instruction Following | 1393 | — |

## Long Context

- Qwen3.5 27B: 43.1 (#103)
- Step 3.7 Flash: —

| Benchmark | Qwen3.5 27B | Step 3.7 Flash |
|---|---|---|
| LMArena Longer Query | 1413 | — |

## Writing & Preference

- Qwen3.5 27B: 59.5 (#106)
- Step 3.7 Flash: —

| Benchmark | Qwen3.5 27B | Step 3.7 Flash |
|---|---|---|
| LMArena Text | 1409 | — |
| LMArena Creative Writing | 1362 | — |
| LMArena Multi-Turn | 1410 | — |

## FAQ

### Is Qwen3.5 27B better than Step 3.7 Flash?

Qwen3.5 27B is the stronger model overall, scoring 41.4 to 36.5 on the Noometry Index. Step 3.7 Flash costs 2.0× less per token, which makes it the better buy when Qwen3.5 27B's lead doesn't matter for your workload.

### Which is cheaper, Qwen3.5 27B or Step 3.7 Flash?

Step 3.7 Flash is cheaper. It lists at $0.18 per million input tokens and $1.11 per million output tokens; Qwen3.5 27B lists at $0.30 and $2.40.

### Is Qwen3.5 27B or Step 3.7 Flash better for coding?

They score almost the same on coding (38.6 vs 39.4); test both on your own repository before choosing.

### Which has the bigger context window?

Qwen3.5 27B does, with 262K tokens against 256K.

### How many benchmarks do Qwen3.5 27B and Step 3.7 Flash share?

3 benchmarks have published results for both models. Qwen3.5 27B has 28 scored results on Noometry and Step 3.7 Flash has 5.