# Qwen1.5 4b Chat vs Yi-Lightning

> Yi-Lightning is the stronger model overall, scoring 37.1 to 28.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/qwen1-5-4b-chat-vs-yi-lightning
- Last updated: 2026-10-10
- Shared benchmarks: 13

## Summary

- They share 13 benchmarks with published results for both. Qwen1.5 4b Chat scores higher in 1 category and Yi-Lightning in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Yi-Lightning leads 50.2 to 23.8.
- Qwen1.5 4b Chat has downloadable open weights; the other is API-only.

## Snapshot

| | Qwen1.5 4b Chat | Yi-Lightning |
|---|---|---|
| Provider | Alibaba (Qwen) | 01.AI |
| Noometry Index | 28.8 | 37.1 |
| Rank | 322 | 209 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Open | Proprietary |

## Coding

- Qwen1.5 4b Chat: 29.1 (#308)
- Yi-Lightning: 27.4 (#320)

| Benchmark | Qwen1.5 4b Chat | Yi-Lightning |
|---|---|---|
| LMArena Coding | 999 | 1312 |
| Aider Polyglot | — | 12.9% |

## Reasoning

- Qwen1.5 4b Chat: 18.5 (#279)
- Yi-Lightning: 25.9 (#139)

| Benchmark | Qwen1.5 4b Chat | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 976 | 1302 |

## Math

- Qwen1.5 4b Chat: 30.4 (#234)
- Yi-Lightning: 36.2 (#172)

| Benchmark | Qwen1.5 4b Chat | Yi-Lightning |
|---|---|---|
| LMArena Math | 1026 | 1300 |

## Knowledge

- Qwen1.5 4b Chat: 26.7 (#255)
- Yi-Lightning: 35.4 (#185)

| Benchmark | Qwen1.5 4b Chat | Yi-Lightning |
|---|---|---|
| LMArena Expert | 980 | 1286 |

## Multilingual

- Qwen1.5 4b Chat: 24.1 (#290)
- Yi-Lightning: 42.2 (#196)

| Benchmark | Qwen1.5 4b Chat | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 979 | 1269 |
| LMArena Chinese | 1024 | 1320 |
| LMArena German | 902 | 1267 |
| LMArena Russian | 952 | 1255 |
| LMArena French | — | 1305 |
| LMArena Japanese | — | 1228 |
| LMArena Korean | — | 1192 |
| LMArena Spanish | — | 1315 |

## Instruction Following

- Qwen1.5 4b Chat: 49.0 (#300)
- Yi-Lightning: 67.4 (#196)

| Benchmark | Qwen1.5 4b Chat | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 978 | 1278 |

## Long Context

- Qwen1.5 4b Chat: 30.1 (#290)
- Yi-Lightning: 39.4 (#181)

| Benchmark | Qwen1.5 4b Chat | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 988 | 1297 |

## Writing & Preference

- Qwen1.5 4b Chat: 23.8 (#309)
- Yi-Lightning: 50.2 (#184)

| Benchmark | Qwen1.5 4b Chat | Yi-Lightning |
|---|---|---|
| LMArena Text | 997 | 1302 |
| LMArena Creative Writing | 969 | 1280 |
| LMArena Multi-Turn | 977 | 1311 |

## FAQ

### Is Qwen1.5 4b Chat better than Yi-Lightning?

Yi-Lightning is the stronger model overall, scoring 37.1 to 28.8 on the Noometry Index.

### Is Qwen1.5 4b Chat or Yi-Lightning better for coding?

Qwen1.5 4b Chat scores higher on coding benchmarks: 29.1 versus 27.4 in the Noometry coding category.

### How many benchmarks do Qwen1.5 4b Chat and Yi-Lightning share?

13 benchmarks have published results for both models. Qwen1.5 4b Chat has 13 scored results on Noometry and Yi-Lightning has 18.