Model comparison
Qwen3-4B vs Qwen3.5 Plus
Qwen3.5 Plus is the stronger model overall, scoring 42.3 to 31.5 on the Noometry Index.
Last verified . 4 shared benchmarks.
Alibaba (Qwen)Summary
- They share 4 benchmarks with published results for both. Qwen3-4B scores higher in 0 categories and Qwen3.5 Plus in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Qwen3.5 Plus leads 47.9 to 28.5.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 52.2% for Qwen3-4B and 86.7% for Qwen3.5 Plus.
- Qwen3-4B has downloadable open weights; the other is API-only.
Side by side
| Qwen3-4B | Qwen3.5 Plus | |
|---|---|---|
| Provider | Alibaba (Qwen) | Alibaba (Qwen) |
| Noometry Index | 31.5 | 42.3 |
| Released | 2025-04-29 | 2026-02-16 |
| Weights | Open | Proprietary |
| Context window | — | 1M |
| Max output | — | 66K |
| Input $ / M tokens | — | $0.40 |
| Output $ / M tokens | — | $2.40 |
| Results tracked | 6 | 15 |
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Category by category
Coding Not comparable
Qwen3-4B: —, Qwen3.5 Plus: —
| Benchmark | Qwen3-4B | Qwen3.5 Plus |
|---|---|---|
| ALE-Bench | — | 621.92 |
Agentic & Tool Use Not comparable
Qwen3-4B: 27.3 (#94), Qwen3.5 Plus: —
| Benchmark | Qwen3-4B | Qwen3.5 Plus |
|---|---|---|
| Berkeley Function Calling Leaderboard | 35.7% | — |
| Vending-Bench 2 | — | 0.54 |
Reasoning Qwen3.5 Plus leads
Qwen3-4B: 18.5 (#264), Qwen3.5 Plus: 32.0 (#67)
| Benchmark | Qwen3-4B | Qwen3.5 Plus |
|---|---|---|
| Chess Puzzles | 4% | 22% |
| Mystery Game Puzzles | — | 17% |
| DTBench | — | 80.5% |
| LMCA | — | 36.4% |
| Epoch Capabilities Index | — | 146.79 |
Math Qwen3.5 Plus leads
Qwen3-4B: 28.5 (#228), Qwen3.5 Plus: 47.9 (#55)
| Benchmark | Qwen3-4B | Qwen3.5 Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 52.2% | 86.7% |
| MathArena Final-Answer Competitions | 38.5% | — |
| FrontierMath (Feb 2025 set) | — | 21% |
| FrontierMath Tier 4 (v1) | — | 2.1% |
Knowledge Qwen3.5 Plus leads
Qwen3-4B: 33.0 (#198), Qwen3.5 Plus: 46.0 (#78)
| Benchmark | Qwen3-4B | Qwen3.5 Plus |
|---|---|---|
| GPQA Diamond | 52.3% | 84.8% |
| Vectara Hallucination Rate | 5.7% | 10.7% |
| SimpleQA Verified | — | 25.4% |
Long Context Not comparable
Qwen3-4B: —, Qwen3.5 Plus: 42.9 (#109)
| Benchmark | Qwen3-4B | Qwen3.5 Plus |
|---|---|---|
| CL-bench | — | 19.8% |
| CL-bench Life | — | 12.4% |
Frequently asked questions
Is Qwen3-4B better than Qwen3.5 Plus?
Qwen3.5 Plus is the stronger model overall, scoring 42.3 to 31.5 on the Noometry Index.
How many benchmarks do Qwen3-4B and Qwen3.5 Plus share?
4 benchmarks have published results for both models. Qwen3-4B has 6 scored results on Noometry and Qwen3.5 Plus has 15.