Model comparison
Qwen1.5-72B vs Qwen3.5 Plus
Qwen3.5 Plus is the stronger model overall, scoring 42.3 to 30.3 on the Noometry Index.
Last verified . 1 shared benchmarks.
Alibaba (Qwen)Summary
- They share 1 benchmark with published results for both. Qwen1.5-72B scores higher in 0 categories and Qwen3.5 Plus in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Qwen3.5 Plus leads 46.0 to 11.5.
- The biggest single-benchmark swing is GPQA Diamond: 28.8% for Qwen1.5-72B and 84.8% for Qwen3.5 Plus.
- Qwen1.5-72B has downloadable open weights; the other is API-only.
Side by side
| Qwen1.5-72B | Qwen3.5 Plus | |
|---|---|---|
| Provider | Alibaba (Qwen) | Alibaba (Qwen) |
| Noometry Index | 30.3 | 42.3 |
| Released | 2024-02-04 | 2026-02-16 |
| Weights | Open | Proprietary |
| Context window | — | 1M |
| Max output | — | 66K |
| Input $ / M tokens | — | $0.40 |
| Output $ / M tokens | — | $2.40 |
| Results tracked | 22 | 15 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Not comparable
Qwen1.5-72B: 31.4 (#272), Qwen3.5 Plus: —
| Benchmark | Qwen1.5-72B | Qwen3.5 Plus |
|---|---|---|
| BigCodeBench Instruct | 33.2% | — |
| LMArena Coding | 1166 | — |
| BigCodeBench Complete | 40.3% | — |
| ALE-Bench | — | 621.92 |
| HumanEval+ | 59.1% | — |
| MBPP+ | 61.6% | — |
Agentic & Tool Use Not comparable
Qwen1.5-72B: —, Qwen3.5 Plus: —
| Benchmark | Qwen1.5-72B | Qwen3.5 Plus |
|---|---|---|
| Vending-Bench 2 | — | 0.54 |
Reasoning Qwen3.5 Plus leads
Qwen1.5-72B: 21.2 (#201), Qwen3.5 Plus: 32.0 (#67)
| Benchmark | Qwen1.5-72B | Qwen3.5 Plus |
|---|---|---|
| Chess Puzzles | — | 22% |
| LMArena Hard Prompts | 1148 | — |
| Mystery Game Puzzles | — | 17% |
| DTBench | — | 80.5% |
| LMCA | — | 36.4% |
| Epoch Capabilities Index | — | 146.79 |
Math Qwen3.5 Plus leads
Qwen1.5-72B: 30.7 (#205), Qwen3.5 Plus: 47.9 (#55)
| Benchmark | Qwen1.5-72B | Qwen3.5 Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 86.7% |
| LMArena Math | 1164 | — |
| FrontierMath (Feb 2025 set) | — | 21% |
| FrontierMath Tier 4 (v1) | — | 2.1% |
Knowledge Qwen3.5 Plus leads
Qwen1.5-72B: 11.5 (#295), Qwen3.5 Plus: 46.0 (#78)
| Benchmark | Qwen1.5-72B | Qwen3.5 Plus |
|---|---|---|
| GPQA Diamond | 28.8% | 84.8% |
| SimpleQA Verified | — | 25.4% |
| Vectara Hallucination Rate | — | 10.7% |
| LMArena Expert | 1136 | — |
Multilingual Not comparable
Qwen1.5-72B: 33.4 (#248), Qwen3.5 Plus: —
| Benchmark | Qwen1.5-72B | Qwen3.5 Plus |
|---|---|---|
| LMArena Non-English | 1135 | — |
| LMArena Chinese | 1186 | — |
| LMArena French | 1158 | — |
| LMArena German | 1084 | — |
| LMArena Japanese | 1061 | — |
| LMArena Korean | 1049 | — |
| LMArena Russian | 1104 | — |
| LMArena Spanish | 1110 | — |
Instruction Following Not comparable
Qwen1.5-72B: 59.6 (#251), Qwen3.5 Plus: —
| Benchmark | Qwen1.5-72B | Qwen3.5 Plus |
|---|---|---|
| LMArena Instruction Following | 1142 | — |
Long Context Qwen3.5 Plus leads
Qwen1.5-72B: 35.0 (#238), Qwen3.5 Plus: 42.9 (#109)
| Benchmark | Qwen1.5-72B | Qwen3.5 Plus |
|---|---|---|
| CL-bench | — | 19.8% |
| CL-bench Life | — | 12.4% |
| LMArena Longer Query | 1157 | — |
Writing & Preference Not comparable
Qwen1.5-72B: 37.4 (#253), Qwen3.5 Plus: —
| Benchmark | Qwen1.5-72B | Qwen3.5 Plus |
|---|---|---|
| LMArena Text | 1166 | — |
| LMArena Creative Writing | 1137 | — |
| LMArena Multi-Turn | 1160 | — |
Frequently asked questions
Is Qwen1.5-72B better than Qwen3.5 Plus?
Qwen3.5 Plus is the stronger model overall, scoring 42.3 to 30.3 on the Noometry Index.
How many benchmarks do Qwen1.5-72B and Qwen3.5 Plus share?
1 benchmark has published results for both models. Qwen1.5-72B has 22 scored results on Noometry and Qwen3.5 Plus has 15.