# Qwen3-4B vs Step 5 Preview

> Step 5 Preview is the stronger model overall, scoring 43.8 to 31.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/qwen3-4b-vs-step-5-preview
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in reasoning, where Step 5 Preview leads 38.0 to 18.5.
- Qwen3-4B has downloadable open weights; the other is API-only.

## Snapshot

| | Qwen3-4B | Step 5 Preview |
|---|---|---|
| Provider | Alibaba (Qwen) | StepFun |
| Noometry Index | 31.5 | 43.8 |
| Rank | 261 | 78 |
| Context | — | 1.02M |
| Input $/M | — | $1 |
| Output $/M | — | $2.70 |
| Weights | Open | Proprietary |

## Coding

- Qwen3-4B: —
- Step 5 Preview: 50.6 (#40)

| Benchmark | Qwen3-4B | Step 5 Preview |
|---|---|---|
| LMArena WebDev | — | 1569 |
| SciCode | — | 58.9% |

## Agentic & Tool Use

- Qwen3-4B: 27.3 (#94)
- Step 5 Preview: —

| Benchmark | Qwen3-4B | Step 5 Preview |
|---|---|---|
| Berkeley Function Calling Leaderboard | 35.7% | — |

## Reasoning

- Qwen3-4B: 18.5 (#264)
- Step 5 Preview: 38.0 (#58)

| Benchmark | Qwen3-4B | Step 5 Preview |
|---|---|---|
| CritPt | — | 20.9% |
| Chess Puzzles | 4% | — |

## Math

- Qwen3-4B: 28.5 (#228)
- Step 5 Preview: —

| Benchmark | Qwen3-4B | Step 5 Preview |
|---|---|---|
| MathArena Final-Answer Competitions | 38.5% | — |
| OTIS Mock AIME 2024-2025 | 52.2% | — |

## Knowledge

- Qwen3-4B: 33.0 (#198)
- Step 5 Preview: —

| Benchmark | Qwen3-4B | Step 5 Preview |
|---|---|---|
| GPQA Diamond | 52.3% | — |
| Vectara Hallucination Rate | 5.7% | — |

## FAQ

### Is Qwen3-4B better than Step 5 Preview?

Step 5 Preview is the stronger model overall, scoring 43.8 to 31.5 on the Noometry Index.

### How many benchmarks do Qwen3-4B and Step 5 Preview share?

0 benchmarks have published results for both models. Qwen3-4B has 6 scored results on Noometry and Step 5 Preview has 3.