# Claude 3 Sonnet vs Qwen3.5-Flash

> Qwen3.5-Flash is the stronger model overall, scoring 42.5 to 29.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-3-sonnet-vs-qwen3-5-flash
- Last updated: 2026-10-12
- Shared benchmarks: 21

## Summary

- They share 21 benchmarks with published results for both. Claude 3 Sonnet scores higher in 0 categories and Qwen3.5-Flash in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Qwen3.5-Flash leads 37.4 to 10.7.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 2.5% for Claude 3 Sonnet and 84.4% for Qwen3.5-Flash.

## Snapshot

| | Claude 3 Sonnet | Qwen3.5-Flash |
|---|---|---|
| Provider | Anthropic | Alibaba (Qwen) |
| Noometry Index | 29.0 | 42.5 |
| Rank | 319 | 112 |
| Context | — | 1M |
| Input $/M | — | $0.10 |
| Output $/M | — | $0.40 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 3 Sonnet: 29.6 (#302)
- Qwen3.5-Flash: 34.2 (#242)

| Benchmark | Claude 3 Sonnet | Qwen3.5-Flash |
|---|---|---|
| LMArena Coding | 1223 | 1412 |
| LMArena WebDev | — | 1244 |
| WeirdML | 10.2% | — |
| BigCodeBench Instruct | 42.7% | — |
| BigCodeBench Complete | 53.8% | — |
| ALE-Bench | — | 221.8 |
| HumanEval+ | 64% | — |
| MBPP+ | 69.3% | — |

## Agentic & Tool Use

- Claude 3 Sonnet: —
- Qwen3.5-Flash: —

| Benchmark | Claude 3 Sonnet | Qwen3.5-Flash |
|---|---|---|
| Vending-Bench 2 | — | 462.69 |

## Reasoning

- Claude 3 Sonnet: 20.5 (#237)
- Qwen3.5-Flash: 33.7 (#72)

| Benchmark | Claude 3 Sonnet | Qwen3.5-Flash |
|---|---|---|
| LMArena Hard Prompts | 1197 | 1403 |
| DTBench | 53.6% | 82.9% |
| Epoch Capabilities Index | 120.7 | 143.98 |
| Chess Puzzles | — | 21% |
| Mystery Game Puzzles | — | 20% |
| LMCA | — | 29.1% |
| WinoGrande | 75.1% | — |

## Math

- Claude 3 Sonnet: 10.7 (#310)
- Qwen3.5-Flash: 37.4 (#158)

| Benchmark | Claude 3 Sonnet | Qwen3.5-Flash |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.5% | 84.4% |
| LMArena Math | 1213 | 1407 |
| FrontierMath (Tiers 1-3) | — | 18.2% |
| MATH Level 5 | 18.2% | — |
| FrontierMath (Feb 2025 set) | — | 6.2% |
| FrontierMath Tier 4 (v1) | — | 0% |

## Knowledge

- Claude 3 Sonnet: 21.1 (#276)
- Qwen3.5-Flash: 43.2 (#93)

| Benchmark | Claude 3 Sonnet | Qwen3.5-Flash |
|---|---|---|
| GPQA Diamond | 40.6% | 82.3% |
| LMArena Expert | 1173 | 1407 |
| SimpleQA Verified | — | 20.3% |
| Vectara Hallucination Rate | — | 10.5% |
| MMLU | 75.9% | — |

## Multimodal

- Claude 3 Sonnet: 25.2 (#125)
- Qwen3.5-Flash: —

| Benchmark | Claude 3 Sonnet | Qwen3.5-Flash |
|---|---|---|
| LMArena Vision | 984 | — |

## Multilingual

- Claude 3 Sonnet: 37.8 (#234)
- Qwen3.5-Flash: 50.5 (#121)

| Benchmark | Claude 3 Sonnet | Qwen3.5-Flash |
|---|---|---|
| LMArena Non-English | 1205 | 1385 |
| LMArena Chinese | 1189 | 1446 |
| LMArena French | 1229 | 1412 |
| LMArena German | 1204 | 1390 |
| LMArena Japanese | 1131 | 1368 |
| LMArena Korean | 1128 | 1344 |
| LMArena Russian | 1227 | 1379 |
| LMArena Spanish | 1204 | 1400 |

## Instruction Following

- Claude 3 Sonnet: 62.8 (#235)
- Qwen3.5-Flash: 72.6 (#139)

| Benchmark | Claude 3 Sonnet | Qwen3.5-Flash |
|---|---|---|
| LMArena Instruction Following | 1199 | 1374 |

## Long Context

- Claude 3 Sonnet: 36.7 (#228)
- Qwen3.5-Flash: 42.4 (#124)

| Benchmark | Claude 3 Sonnet | Qwen3.5-Flash |
|---|---|---|
| LMArena Longer Query | 1211 | 1392 |

## Writing & Preference

- Claude 3 Sonnet: 42.1 (#238)
- Qwen3.5-Flash: 57.9 (#122)

| Benchmark | Claude 3 Sonnet | Qwen3.5-Flash |
|---|---|---|
| LMArena Text | 1218 | 1397 |
| LMArena Creative Writing | 1186 | 1343 |
| LMArena Multi-Turn | 1227 | 1393 |

## FAQ

### Is Claude 3 Sonnet better than Qwen3.5-Flash?

Qwen3.5-Flash is the stronger model overall, scoring 42.5 to 29.0 on the Noometry Index.

### Is Claude 3 Sonnet or Qwen3.5-Flash better for coding?

Qwen3.5-Flash scores higher on coding benchmarks: 34.2 versus 29.6 in the Noometry coding category.

### How many benchmarks do Claude 3 Sonnet and Qwen3.5-Flash share?

21 benchmarks have published results for both models. Claude 3 Sonnet has 30 scored results on Noometry and Qwen3.5-Flash has 32.