# Qwen3.5-Flash vs Yi-1.5-34B

> Qwen3.5-Flash is the stronger model overall, scoring 42.5 to 30.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/qwen3-5-flash-vs-yi-1-5-34b
- Last updated: 2026-10-12
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Qwen3.5-Flash scores higher in 8 categories and Yi-1.5-34B in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Qwen3.5-Flash leads 43.2 to 14.8.
- The biggest single-benchmark swing is GPQA Diamond: 82.3% for Qwen3.5-Flash and 32% for Yi-1.5-34B.
- Yi-1.5-34B has downloadable open weights; the other is API-only.

## Snapshot

| | Qwen3.5-Flash | Yi-1.5-34B |
|---|---|---|
| Provider | Alibaba (Qwen) | 01.AI |
| Noometry Index | 42.5 | 30.6 |
| Rank | 112 | 289 |
| Context | 1M | — |
| Input $/M | $0.10 | — |
| Output $/M | $0.40 | — |
| Weights | Proprietary | Open |

## Coding

- Qwen3.5-Flash: 34.2 (#242)
- Yi-1.5-34B: 32.4 (#272)

| Benchmark | Qwen3.5-Flash | Yi-1.5-34B |
|---|---|---|
| LMArena Coding | 1412 | 1169 |
| LMArena WebDev | 1244 | — |
| BigCodeBench Instruct | — | 33.9% |
| BigCodeBench Complete | — | 43.8% |
| ALE-Bench | 221.8 | — |

## Agentic & Tool Use

- Qwen3.5-Flash: —
- Yi-1.5-34B: —

| Benchmark | Qwen3.5-Flash | Yi-1.5-34B |
|---|---|---|
| Vending-Bench 2 | 462.69 | — |

## Reasoning

- Qwen3.5-Flash: 33.7 (#72)
- Yi-1.5-34B: 22.5 (#191)

| Benchmark | Qwen3.5-Flash | Yi-1.5-34B |
|---|---|---|
| LMArena Hard Prompts | 1403 | 1160 |
| Chess Puzzles | 21% | — |
| Mystery Game Puzzles | 20% | — |
| DTBench | 82.9% | — |
| LMCA | 29.1% | — |
| Epoch Capabilities Index | 143.98 | — |

## Math

- Qwen3.5-Flash: 37.4 (#158)
- Yi-1.5-34B: 27.5 (#249)

| Benchmark | Qwen3.5-Flash | Yi-1.5-34B |
|---|---|---|
| LMArena Math | 1407 | 1182 |
| FrontierMath (Tiers 1-3) | 18.2% | — |
| OTIS Mock AIME 2024-2025 | 84.4% | — |
| MATH Level 5 | — | 25.5% |
| FrontierMath (Feb 2025 set) | 6.2% | — |
| FrontierMath Tier 4 (v1) | 0% | — |

## Knowledge

- Qwen3.5-Flash: 43.2 (#93)
- Yi-1.5-34B: 14.8 (#295)

| Benchmark | Qwen3.5-Flash | Yi-1.5-34B |
|---|---|---|
| GPQA Diamond | 82.3% | 32% |
| LMArena Expert | 1407 | 1144 |
| SimpleQA Verified | 20.3% | — |
| Vectara Hallucination Rate | 10.5% | — |

## Multilingual

- Qwen3.5-Flash: 50.5 (#121)
- Yi-1.5-34B: 32.3 (#256)

| Benchmark | Qwen3.5-Flash | Yi-1.5-34B |
|---|---|---|
| LMArena Non-English | 1385 | 1121 |
| LMArena Chinese | 1446 | 1213 |
| LMArena French | 1412 | 1156 |
| LMArena German | 1390 | 1111 |
| LMArena Japanese | 1368 | 1021 |
| LMArena Korean | 1344 | 1005 |
| LMArena Russian | 1379 | 1091 |
| LMArena Spanish | 1400 | 1121 |

## Instruction Following

- Qwen3.5-Flash: 72.6 (#139)
- Yi-1.5-34B: 59.2 (#257)

| Benchmark | Qwen3.5-Flash | Yi-1.5-34B |
|---|---|---|
| LMArena Instruction Following | 1374 | 1139 |

## Long Context

- Qwen3.5-Flash: 42.4 (#124)
- Yi-1.5-34B: 34.6 (#248)

| Benchmark | Qwen3.5-Flash | Yi-1.5-34B |
|---|---|---|
| LMArena Longer Query | 1392 | 1143 |

## Writing & Preference

- Qwen3.5-Flash: 57.9 (#122)
- Yi-1.5-34B: 37.4 (#257)

| Benchmark | Qwen3.5-Flash | Yi-1.5-34B |
|---|---|---|
| LMArena Text | 1397 | 1173 |
| LMArena Creative Writing | 1343 | 1135 |
| LMArena Multi-Turn | 1393 | 1153 |

## FAQ

### Is Qwen3.5-Flash better than Yi-1.5-34B?

Qwen3.5-Flash is the stronger model overall, scoring 42.5 to 30.6 on the Noometry Index.

### Is Qwen3.5-Flash or Yi-1.5-34B better for coding?

Qwen3.5-Flash scores higher on coding benchmarks: 34.2 versus 32.4 in the Noometry coding category.

### How many benchmarks do Qwen3.5-Flash and Yi-1.5-34B share?

18 benchmarks have published results for both models. Qwen3.5-Flash has 32 scored results on Noometry and Yi-1.5-34B has 21.