# Qwen3-4B vs Step 3.5 Flash

> Step 3.5 Flash is the stronger model overall, scoring 42.3 to 31.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/qwen3-4b-vs-step-3-5-flash
- Last updated: 2026-10-11
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. Qwen3-4B scores higher in 0 categories and Step 3.5 Flash in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Step 3.5 Flash leads 42.6 to 29.7.
- The biggest single-benchmark swing is MathArena Final-Answer Competitions: 38.5% for Qwen3-4B and 66.8% for Step 3.5 Flash.

## Snapshot

| | Qwen3-4B | Step 3.5 Flash |
|---|---|---|
| Provider | Alibaba (Qwen) | StepFun |
| Noometry Index | 31.9 | 42.3 |
| Rank | 264 | 116 |
| Context | — | 256K |
| Input $/M | — | $0.10 |
| Output $/M | — | $0.30 |
| Weights | Open | Open |

## Coding

- Qwen3-4B: —
- Step 3.5 Flash: 42.4 (#105)

| Benchmark | Qwen3-4B | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | — | 1436 |

## Agentic & Tool Use

- Qwen3-4B: 27.6 (#100)
- Step 3.5 Flash: —

| Benchmark | Qwen3-4B | Step 3.5 Flash |
|---|---|---|
| Berkeley Function Calling Leaderboard | 35.7% | — |

## Reasoning

- Qwen3-4B: 19.2 (#268)
- Step 3.5 Flash: 22.2 (#202)

| Benchmark | Qwen3-4B | Step 3.5 Flash |
|---|---|---|
| NYT Connections (extended) | — | 28.4% |
| Chess Puzzles | 4% | — |
| LMArena Hard Prompts | — | 1411 |

## Math

- Qwen3-4B: 29.7 (#240)
- Step 3.5 Flash: 42.6 (#84)

| Benchmark | Qwen3-4B | Step 3.5 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | 38.5% | 66.8% |
| OTIS Mock AIME 2024-2025 | 52.2% | — |
| LMArena Math | — | 1408 |

## Knowledge

- Qwen3-4B: 33.0 (#208)
- Step 3.5 Flash: 39.6 (#132)

| Benchmark | Qwen3-4B | Step 3.5 Flash |
|---|---|---|
| GPQA Diamond | 52.3% | — |
| Vectara Hallucination Rate | 5.7% | — |
| LMArena Expert | — | 1421 |

## Multilingual

- Qwen3-4B: —
- Step 3.5 Flash: 50.5 (#119)

| Benchmark | Qwen3-4B | Step 3.5 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

- Qwen3-4B: —
- Step 3.5 Flash: 73.1 (#124)

| Benchmark | Qwen3-4B | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | — | 1385 |

## Long Context

- Qwen3-4B: —
- Step 3.5 Flash: 42.8 (#117)

| Benchmark | Qwen3-4B | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | — | 1402 |

## Writing & Preference

- Qwen3-4B: —
- Step 3.5 Flash: 58.8 (#113)

| Benchmark | Qwen3-4B | Step 3.5 Flash |
|---|---|---|
| LMArena Text | — | 1403 |
| LMArena Creative Writing | — | 1357 |
| LMArena Multi-Turn | — | 1405 |

## FAQ

### Is Qwen3-4B better than Step 3.5 Flash?

Step 3.5 Flash is the stronger model overall, scoring 42.3 to 31.9 on the Noometry Index.

### How many benchmarks do Qwen3-4B and Step 3.5 Flash share?

1 benchmark has published results for both models. Qwen3-4B has 6 scored results on Noometry and Step 3.5 Flash has 19.