# Qwen3-4B vs Qwen3.5-9B

> Qwen3.5-9B is the stronger model overall, scoring 33.8 to 31.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/qwen3-4b-vs-qwen3-5-9b
- Last updated: 2026-10-12
- Shared benchmarks: 4

## Summary

- They share 4 benchmarks with published results for both. Qwen3-4B scores higher in 1 category and Qwen3.5-9B in 3 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in agentic & tool use, where Qwen3-4B leads 27.6 to 14.5.
- The biggest single-benchmark swing is GPQA Diamond: 52.3% for Qwen3-4B and 79% for Qwen3.5-9B.

## Snapshot

| | Qwen3-4B | Qwen3.5-9B |
|---|---|---|
| Provider | Alibaba (Qwen) | Alibaba (Qwen) |
| Noometry Index | 31.9 | 33.8 |
| Rank | 264 | 236 |
| Context | — | 262K |
| Input $/M | — | $0.10 |
| Output $/M | — | $0.15 |
| Weights | Open | Open |

## Coding

- Qwen3-4B: —
- Qwen3.5-9B: 35.9 (#217)

| Benchmark | Qwen3-4B | Qwen3.5-9B |
|---|---|---|
| SciCode | — | 27.5% |

## Agentic & Tool Use

- Qwen3-4B: 27.6 (#100)
- Qwen3.5-9B: 14.5 (#151)

| Benchmark | Qwen3-4B | Qwen3.5-9B |
|---|---|---|
| Terminal-Bench | — | 9.2% |
| Berkeley Function Calling Leaderboard | 35.7% | — |

## Reasoning

- Qwen3-4B: 19.2 (#268)
- Qwen3.5-9B: 23.1 (#182)

| Benchmark | Qwen3-4B | Qwen3.5-9B |
|---|---|---|
| Chess Puzzles | 4% | 12% |
| CritPt | — | 0.3% |
| DTBench | — | 71.2% |
| LMCA | — | 24.5% |
| Epoch Capabilities Index | — | 139.46 |

## Math

- Qwen3-4B: 29.7 (#240)
- Qwen3.5-9B: 34.8 (#192)

| Benchmark | Qwen3-4B | Qwen3.5-9B |
|---|---|---|
| MathArena Final-Answer Competitions | 38.5% | 48.5% |
| OTIS Mock AIME 2024-2025 | 52.2% | 61.7% |

## Knowledge

- Qwen3-4B: 33.0 (#208)
- Qwen3.5-9B: 46.0 (#84)

| Benchmark | Qwen3-4B | Qwen3.5-9B |
|---|---|---|
| GPQA Diamond | 52.3% | 79% |
| Vectara Hallucination Rate | 5.7% | — |

## FAQ

### Is Qwen3-4B better than Qwen3.5-9B?

Qwen3.5-9B is the stronger model overall, scoring 33.8 to 31.9 on the Noometry Index.

### How many benchmarks do Qwen3-4B and Qwen3.5-9B share?

4 benchmarks have published results for both models. Qwen3-4B has 6 scored results on Noometry and Qwen3.5-9B has 10.