Model comparison
Qwen2.5 72B Instruct vs Qwen3.5 Plus
Qwen3.5 Plus is the stronger model overall, scoring 42.9 to 31.9 on the Noometry Index.
Last verified . 5 shared benchmarks.
Alibaba (Qwen)Summary
- They share 5 benchmarks with published results for both. Qwen2.5 72B Instruct scores higher in 0 categories and Qwen3.5 Plus in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Qwen3.5 Plus leads 49.6 to 19.3.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 8.1% for Qwen2.5 72B Instruct and 86.7% for Qwen3.5 Plus.
- Qwen3.5 Plus is cheaper at $0.40 / $2.40 per million input/output tokens, against $1.40 / $5.60 for Qwen2.5 72B Instruct.
- Qwen3.5 Plus accepts more context: 1M tokens versus 131K.
- Qwen2.5 72B Instruct has downloadable open weights; the other is API-only.
Side by side
| Qwen2.5 72B Instruct | Qwen3.5 Plus | |
|---|---|---|
| Provider | Alibaba (Qwen) | Alibaba (Qwen) |
| Noometry Index | 31.9 | 42.9 |
| Released | 2024-09 | 2026-02-16 |
| Weights | Open | Proprietary |
| Context window | 131K | 1M |
| Max output | 8K | 66K |
| Input $ / M tokens | $1.40 | $0.40 |
| Output $ / M tokens | $5.60 | $2.40 |
| Results tracked | 43 | 15 |
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Category by category
Coding Not comparable
Qwen2.5 72B Instruct: 33.2 (#260), Qwen3.5 Plus: —
| Benchmark | Qwen2.5 72B Instruct | Qwen3.5 Plus |
|---|---|---|
| WeirdML | 16% | — |
| BigCodeBench Instruct | 45.8% | — |
| LMArena Coding | 1292 | — |
| BigCodeBench Complete | 55.9% | — |
| ALE-Bench | — | 621.92 |
Agentic & Tool Use Not comparable
Qwen2.5 72B Instruct: 22.1 (#133), Qwen3.5 Plus: —
| Benchmark | Qwen2.5 72B Instruct | Qwen3.5 Plus |
|---|---|---|
| TheAgentCompany | 5.7% | — |
| BALROG | 16.2% | — |
| METR Time Horizons | 35.8% | — |
| Vending-Bench 2 | — | 0.54 |
Reasoning Qwen3.5 Plus leads
Qwen2.5 72B Instruct: 22.3 (#199), Qwen3.5 Plus: 32.8 (#74)
| Benchmark | Qwen2.5 72B Instruct | Qwen3.5 Plus |
|---|---|---|
| DTBench | 62.9% | 80.5% |
| LMCA | 13.4% | 36.4% |
| Epoch Capabilities Index | 129 | 146.78 |
| Chess Puzzles | — | 22% |
| LMArena Hard Prompts | 1271 | — |
| Mystery Game Puzzles | — | 17% |
| BIG-Bench Hard | 79.8% | — |
| ForecastBench | 57.5 | — |
| HellaSwag | 84.8% | — |
| PIQA | 82.6% | — |
| WinoGrande | 82.3% | — |
Math Qwen3.5 Plus leads
Qwen2.5 72B Instruct: 19.3 (#287), Qwen3.5 Plus: 49.6 (#61)
| Benchmark | Qwen2.5 72B Instruct | Qwen3.5 Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 8.1% | 86.7% |
| Omni-MATH | 33% | — |
| LMArena Math | 1283 | — |
| MATH Level 5 | 63.2% | — |
| FrontierMath (Feb 2025 set) | — | 21% |
| FrontierMath Tier 4 (v1) | — | 2.1% |
Knowledge Qwen3.5 Plus leads
Qwen2.5 72B Instruct: 27.0 (#253), Qwen3.5 Plus: 46.0 (#83)
| Benchmark | Qwen2.5 72B Instruct | Qwen3.5 Plus |
|---|---|---|
| GPQA Diamond | 49.1% | 84.8% |
| SimpleQA Verified | — | 25.4% |
| MMLU-Pro | 63.1% | — |
| Confabulations | 19.1% | — |
| Vectara Hallucination Rate | — | 10.7% |
| GPQA (HELM) | 42.6% | — |
| LMArena Expert | 1245 | — |
| ARC (AI2) Challenge | 94.5% | — |
| MMLU | 85.3% | — |
| TriviaQA | 71.9% | — |
Multilingual Not comparable
Qwen2.5 72B Instruct: 41.0 (#213), Qwen3.5 Plus: —
| Benchmark | Qwen2.5 72B Instruct | Qwen3.5 Plus |
|---|---|---|
| LMArena Non-English | 1252 | — |
| LMArena Chinese | 1272 | — |
| LMArena French | 1280 | — |
| LMArena German | 1234 | — |
| LMArena Japanese | 1180 | — |
| LMArena Korean | 1188 | — |
| LMArena Russian | 1264 | — |
| LMArena Spanish | 1256 | — |
Instruction Following Not comparable
Qwen2.5 72B Instruct: 65.5 (#221), Qwen3.5 Plus: —
| Benchmark | Qwen2.5 72B Instruct | Qwen3.5 Plus |
|---|---|---|
| IFEval | 80.6% | — |
| LMArena Instruction Following | 1254 | — |
Long Context Qwen3.5 Plus leads
Qwen2.5 72B Instruct: 38.9 (#188), Qwen3.5 Plus: 43.0 (#113)
| Benchmark | Qwen2.5 72B Instruct | Qwen3.5 Plus |
|---|---|---|
| CL-bench | — | 19.8% |
| CL-bench Life | — | 12.4% |
| LMArena Longer Query | 1282 | — |
Writing & Preference Not comparable
Qwen2.5 72B Instruct: 46.7 (#215), Qwen3.5 Plus: —
| Benchmark | Qwen2.5 72B Instruct | Qwen3.5 Plus |
|---|---|---|
| LMArena Text | 1269 | — |
| LMArena Creative Writing | 1221 | — |
| WildBench | 80.2% | — |
| LMArena Multi-Turn | 1272 | — |
Frequently asked questions
Is Qwen2.5 72B Instruct better than Qwen3.5 Plus?
Qwen3.5 Plus is the stronger model overall, scoring 42.9 to 31.9 on the Noometry Index.
Which is cheaper, Qwen2.5 72B Instruct or Qwen3.5 Plus?
Qwen3.5 Plus is cheaper. It lists at $0.40 per million input tokens and $2.40 per million output tokens; Qwen2.5 72B Instruct lists at $1.40 and $5.60.
Which has the bigger context window?
Qwen3.5 Plus does, with 1M tokens against 131K.
How many benchmarks do Qwen2.5 72B Instruct and Qwen3.5 Plus share?
5 benchmarks have published results for both models. Qwen2.5 72B Instruct has 43 scored results on Noometry and Qwen3.5 Plus has 15.