Model comparison
Qwen2.5 Plus 1127 vs Qwen3.5 Plus
Qwen3.5 Plus is the stronger model overall, scoring 42.9 to 38.8 on the Noometry Index.
Last verified . 0 shared benchmarks.
Alibaba (Qwen)Summary
- The widest gap is in math, where Qwen3.5 Plus leads 49.6 to 36.1.
Side by side
| Qwen2.5 Plus 1127 | Qwen3.5 Plus | |
|---|---|---|
| Provider | Alibaba (Qwen) | Alibaba (Qwen) |
| Noometry Index | 38.8 | 42.9 |
| Released | — | 2026-02-16 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1M |
| Max output | — | 66K |
| Input $ / M tokens | — | $0.40 |
| Output $ / M tokens | — | $2.40 |
| Results tracked | 14 | 15 |
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Category by category
Coding Not comparable
Qwen2.5 Plus 1127: 38.5 (#175), Qwen3.5 Plus: —
| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5 Plus |
|---|---|---|
| LMArena Coding | 1314 | — |
| ALE-Bench | — | 621.92 |
Agentic & Tool Use Not comparable
Qwen2.5 Plus 1127: —, Qwen3.5 Plus: —
| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5 Plus |
|---|---|---|
| Vending-Bench 2 | — | 0.54 |
Reasoning Qwen3.5 Plus leads
Qwen2.5 Plus 1127: 25.9 (#141), Qwen3.5 Plus: 32.8 (#74)
| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5 Plus |
|---|---|---|
| Chess Puzzles | — | 22% |
| LMArena Hard Prompts | 1299 | — |
| Mystery Game Puzzles | — | 17% |
| DTBench | — | 80.5% |
| LMCA | — | 36.4% |
| Epoch Capabilities Index | — | 146.78 |
Math Qwen3.5 Plus leads
Qwen2.5 Plus 1127: 36.1 (#174), Qwen3.5 Plus: 49.6 (#61)
| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5 Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 86.7% |
| LMArena Math | 1298 | — |
| FrontierMath (Feb 2025 set) | — | 21% |
| FrontierMath Tier 4 (v1) | — | 2.1% |
Knowledge Qwen3.5 Plus leads
Qwen2.5 Plus 1127: 35.5 (#183), Qwen3.5 Plus: 46.0 (#83)
| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5 Plus |
|---|---|---|
| GPQA Diamond | — | 84.8% |
| SimpleQA Verified | — | 25.4% |
| Vectara Hallucination Rate | — | 10.7% |
| LMArena Expert | 1289 | — |
Multilingual Not comparable
Qwen2.5 Plus 1127: 41.9 (#201), Qwen3.5 Plus: —
| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5 Plus |
|---|---|---|
| LMArena Non-English | 1265 | — |
| LMArena Chinese | 1314 | — |
| LMArena German | 1231 | — |
| LMArena Japanese | 1207 | — |
| LMArena Russian | 1271 | — |
Instruction Following Not comparable
Qwen2.5 Plus 1127: 67.2 (#199), Qwen3.5 Plus: —
| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5 Plus |
|---|---|---|
| LMArena Instruction Following | 1275 | — |
Long Context Qwen3.5 Plus leads
Qwen2.5 Plus 1127: 39.2 (#184), Qwen3.5 Plus: 43.0 (#113)
| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5 Plus |
|---|---|---|
| CL-bench | — | 19.8% |
| CL-bench Life | — | 12.4% |
| LMArena Longer Query | 1292 | — |
Writing & Preference Not comparable
Qwen2.5 Plus 1127: 49.4 (#192), Qwen3.5 Plus: —
| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5 Plus |
|---|---|---|
| LMArena Text | 1299 | — |
| LMArena Creative Writing | 1262 | — |
| LMArena Multi-Turn | 1299 | — |
Frequently asked questions
Is Qwen2.5 Plus 1127 better than Qwen3.5 Plus?
Qwen3.5 Plus is the stronger model overall, scoring 42.9 to 38.8 on the Noometry Index.
How many benchmarks do Qwen2.5 Plus 1127 and Qwen3.5 Plus share?
0 benchmarks have published results for both models. Qwen2.5 Plus 1127 has 14 scored results on Noometry and Qwen3.5 Plus has 15.