Model comparison
Qwen Plus vs Qwen3.5 Plus
Qwen3.5 Plus is the stronger model overall, scoring 42.9 to 37.1 on the Noometry Index.
Last verified . 5 shared benchmarks.
Alibaba (Qwen)Summary
- They share 5 benchmarks with published results for both. Qwen Plus 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 23.3.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 17.8% for Qwen Plus and 86.7% for Qwen3.5 Plus.
- Qwen Plus is cheaper at $0.40 / $1.20 per million input/output tokens, against $0.40 / $2.40 for Qwen3.5 Plus.
Side by side
| Qwen Plus | Qwen3.5 Plus | |
|---|---|---|
| Provider | Alibaba (Qwen) | Alibaba (Qwen) |
| Noometry Index | 37.1 | 42.9 |
| Released | 2024-01-25 | 2026-02-16 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 1M |
| Max output | 33K | 66K |
| Input $ / M tokens | $0.40 | $0.40 |
| Output $ / M tokens | $1.20 | $2.40 |
| Results tracked | 20 | 15 |
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Category by category
Coding Not comparable
Qwen Plus: 38.9 (#167), Qwen3.5 Plus: —
| Benchmark | Qwen Plus | Qwen3.5 Plus |
|---|---|---|
| LMArena Coding | 1328 | — |
| ALE-Bench | — | 621.92 |
Agentic & Tool Use Not comparable
Qwen Plus: —, Qwen3.5 Plus: —
| Benchmark | Qwen Plus | Qwen3.5 Plus |
|---|---|---|
| Vending-Bench 2 | — | 0.54 |
Reasoning Qwen3.5 Plus leads
Qwen Plus: 28.4 (#107), Qwen3.5 Plus: 32.8 (#74)
| Benchmark | Qwen Plus | Qwen3.5 Plus |
|---|---|---|
| DTBench | 81.1% | 80.5% |
| LMCA | 24% | 36.4% |
| Kagi LLM Benchmark | 63.3% | — |
| Chess Puzzles | — | 22% |
| LMArena Hard Prompts | 1317 | — |
| Mystery Game Puzzles | — | 17% |
| Epoch Capabilities Index | — | 146.78 |
Math Qwen3.5 Plus leads
Qwen Plus: 23.3 (#271), Qwen3.5 Plus: 49.6 (#61)
| Benchmark | Qwen Plus | Qwen3.5 Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 17.8% | 86.7% |
| FrontierMath (Feb 2025 set) | 1.7% | 21% |
| LMArena Math | 1326 | — |
| MATH Level 5 | 65.3% | — |
| FrontierMath Tier 4 (v1) | — | 2.1% |
Knowledge Qwen3.5 Plus leads
Qwen Plus: 27.4 (#251), Qwen3.5 Plus: 46.0 (#83)
| Benchmark | Qwen Plus | Qwen3.5 Plus |
|---|---|---|
| GPQA Diamond | 48.1% | 84.8% |
| SimpleQA Verified | — | 25.4% |
| Vectara Hallucination Rate | — | 10.7% |
| LMArena Expert | 1328 | — |
Multilingual Not comparable
Qwen Plus: 45.1 (#175), Qwen3.5 Plus: —
| Benchmark | Qwen Plus | Qwen3.5 Plus |
|---|---|---|
| LMArena Non-English | 1310 | — |
| LMArena Chinese | 1347 | — |
| LMArena Japanese | 1251 | — |
| LMArena Russian | 1323 | — |
Instruction Following Not comparable
Qwen Plus: 68.8 (#181), Qwen3.5 Plus: —
| Benchmark | Qwen Plus | Qwen3.5 Plus |
|---|---|---|
| LMArena Instruction Following | 1303 | — |
Long Context Qwen3.5 Plus leads
Qwen Plus: 40.3 (#158), Qwen3.5 Plus: 43.0 (#113)
| Benchmark | Qwen Plus | Qwen3.5 Plus |
|---|---|---|
| CL-bench | — | 19.8% |
| CL-bench Life | — | 12.4% |
| LMArena Longer Query | 1324 | — |
Writing & Preference Not comparable
Qwen Plus: 52.2 (#176), Qwen3.5 Plus: —
| Benchmark | Qwen Plus | Qwen3.5 Plus |
|---|---|---|
| LMArena Text | 1326 | — |
| LMArena Creative Writing | 1293 | — |
| LMArena Multi-Turn | 1336 | — |
Frequently asked questions
Is Qwen Plus better than Qwen3.5 Plus?
Qwen3.5 Plus is the stronger model overall, scoring 42.9 to 37.1 on the Noometry Index.
Which is cheaper, Qwen Plus or Qwen3.5 Plus?
Qwen Plus is cheaper. It lists at $0.40 per million input tokens and $1.20 per million output tokens; Qwen3.5 Plus lists at $0.40 and $2.40.
Which has the bigger context window?
Both accept 1M tokens.
How many benchmarks do Qwen Plus and Qwen3.5 Plus share?
5 benchmarks have published results for both models. Qwen Plus has 20 scored results on Noometry and Qwen3.5 Plus has 15.