# Qwen2.5 Plus 1127 vs Qwen3.5-9B

> Qwen2.5 Plus 1127 is the stronger model overall, scoring 38.8 to 33.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/qwen2-5-plus-vs-qwen3-5-9b
- Last updated: 2026-10-12
- Shared benchmarks: 0

## Summary

- The widest gap is in knowledge, where Qwen3.5-9B leads 46.0 to 35.5.
- Qwen3.5-9B has downloadable open weights; the other is API-only.

## Snapshot

| | Qwen2.5 Plus 1127 | Qwen3.5-9B |
|---|---|---|
| Provider | Alibaba (Qwen) | Alibaba (Qwen) |
| Noometry Index | 38.8 | 33.8 |
| Rank | 181 | 236 |
| Context | — | 262K |
| Input $/M | — | $0.10 |
| Output $/M | — | $0.15 |
| Weights | Proprietary | Open |

## Coding

- Qwen2.5 Plus 1127: 38.5 (#175)
- Qwen3.5-9B: 35.9 (#217)

| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5-9B |
|---|---|---|
| SciCode | — | 27.5% |
| LMArena Coding | 1314 | — |

## Agentic & Tool Use

- Qwen2.5 Plus 1127: —
- Qwen3.5-9B: 14.5 (#151)

| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5-9B |
|---|---|---|
| Terminal-Bench | — | 9.2% |

## Reasoning

- Qwen2.5 Plus 1127: 25.9 (#141)
- Qwen3.5-9B: 23.1 (#182)

| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5-9B |
|---|---|---|
| CritPt | — | 0.3% |
| Chess Puzzles | — | 12% |
| LMArena Hard Prompts | 1299 | — |
| DTBench | — | 71.2% |
| LMCA | — | 24.5% |
| Epoch Capabilities Index | — | 139.46 |

## Math

- Qwen2.5 Plus 1127: 36.1 (#174)
- Qwen3.5-9B: 34.8 (#192)

| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5-9B |
|---|---|---|
| MathArena Final-Answer Competitions | — | 48.5% |
| OTIS Mock AIME 2024-2025 | — | 61.7% |
| LMArena Math | 1298 | — |

## Knowledge

- Qwen2.5 Plus 1127: 35.5 (#183)
- Qwen3.5-9B: 46.0 (#84)

| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5-9B |
|---|---|---|
| GPQA Diamond | — | 79% |
| LMArena Expert | 1289 | — |

## Multilingual

- Qwen2.5 Plus 1127: 41.9 (#201)
- Qwen3.5-9B: —

| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5-9B |
|---|---|---|
| LMArena Non-English | 1265 | — |
| LMArena Chinese | 1314 | — |
| LMArena German | 1231 | — |
| LMArena Japanese | 1207 | — |
| LMArena Russian | 1271 | — |

## Instruction Following

- Qwen2.5 Plus 1127: 67.2 (#199)
- Qwen3.5-9B: —

| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5-9B |
|---|---|---|
| LMArena Instruction Following | 1275 | — |

## Long Context

- Qwen2.5 Plus 1127: 39.2 (#184)
- Qwen3.5-9B: —

| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5-9B |
|---|---|---|
| LMArena Longer Query | 1292 | — |

## Writing & Preference

- Qwen2.5 Plus 1127: 49.4 (#192)
- Qwen3.5-9B: —

| Benchmark | Qwen2.5 Plus 1127 | Qwen3.5-9B |
|---|---|---|
| LMArena Text | 1299 | — |
| LMArena Creative Writing | 1262 | — |
| LMArena Multi-Turn | 1299 | — |

## FAQ

### Is Qwen2.5 Plus 1127 better than Qwen3.5-9B?

Qwen2.5 Plus 1127 is the stronger model overall, scoring 38.8 to 33.8 on the Noometry Index.

### Is Qwen2.5 Plus 1127 or Qwen3.5-9B better for coding?

Qwen2.5 Plus 1127 scores higher on coding benchmarks: 38.5 versus 35.9 in the Noometry coding category.

### How many benchmarks do Qwen2.5 Plus 1127 and Qwen3.5-9B share?

0 benchmarks have published results for both models. Qwen2.5 Plus 1127 has 14 scored results on Noometry and Qwen3.5-9B has 10.