# Qwen Plus vs Qwen3.5 Plus

> Qwen3.5 Plus is the stronger model overall, scoring 42.9 to 37.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/qwen-plus-vs-qwen3-5-plus
- Last updated: 2026-10-10
- Shared benchmarks: 5

## 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.

## Snapshot

| | Qwen Plus | Qwen3.5 Plus |
|---|---|---|
| Provider | Alibaba (Qwen) | Alibaba (Qwen) |
| Noometry Index | 37.1 | 42.9 |
| Rank | 210 | 106 |
| Context | 1M | 1M |
| Input $/M | $0.40 | $0.40 |
| Output $/M | $1.20 | $2.40 |
| Weights | Proprietary | Proprietary |

## Coding

- Qwen Plus: 38.9 (#167)
- Qwen3.5 Plus: —

| Benchmark | Qwen Plus | Qwen3.5 Plus |
|---|---|---|
| LMArena Coding | 1328 | — |
| ALE-Bench | — | 621.92 |

## Agentic & Tool Use

- Qwen Plus: —
- Qwen3.5 Plus: —

| Benchmark | Qwen Plus | Qwen3.5 Plus |
|---|---|---|
| Vending-Bench 2 | — | 0.54 |

## Reasoning

- 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

- 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

- 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

- 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

- Qwen Plus: 68.8 (#181)
- Qwen3.5 Plus: —

| Benchmark | Qwen Plus | Qwen3.5 Plus |
|---|---|---|
| LMArena Instruction Following | 1303 | — |

## Long Context

- 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

- 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 | — |

## FAQ

### 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.