# Llama 2-7B vs Yi-Lightning

> Yi-Lightning is the stronger model overall, scoring 37.1 to 29.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/llama-2-7b-vs-yi-lightning
- Last updated: 2026-10-11
- Shared benchmarks: 15

## Summary

- They share 15 benchmarks with published results for both. Llama 2-7B 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 28.0.
- Llama 2-7B has downloadable open weights; the other is API-only.

## Snapshot

| | Llama 2-7B | Yi-Lightning |
|---|---|---|
| Provider | Meta | 01.AI |
| Noometry Index | 29.1 | 37.1 |
| Rank | 317 | 209 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Open | Proprietary |

## Coding

- Llama 2-7B: 29.2 (#307)
- Yi-Lightning: 27.4 (#320)

| Benchmark | Llama 2-7B | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1002 | 1312 |
| Aider Polyglot | — | 12.9% |

## Reasoning

- Llama 2-7B: 15.7 (#312)
- Yi-Lightning: 25.9 (#139)

| Benchmark | Llama 2-7B | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1009 | 1302 |
| Chess Puzzles | 0% | — |
| BIG-Bench Hard | 39.2% | — |
| Epoch Capabilities Index | 99.06 | — |
| HellaSwag | 77.2% | — |
| LAMBADA | 73.3% | — |
| PIQA | 78.8% | — |
| WinoGrande | 69.2% | — |

## Math

- Llama 2-7B: 30.7 (#233)
- Yi-Lightning: 36.2 (#172)

| Benchmark | Llama 2-7B | Yi-Lightning |
|---|---|---|
| LMArena Math | 1042 | 1300 |
| GSM8K | 16.7% | — |

## Knowledge

- Llama 2-7B: 28.2 (#248)
- Yi-Lightning: 35.4 (#185)

| Benchmark | Llama 2-7B | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1036 | 1286 |
| ARC (AI2) Challenge | 45.9% | — |
| BoolQ | 77.9% | — |
| MMLU | 45.8% | — |
| OpenBookQA | 58.6% | — |
| TriviaQA | 73.7% | — |

## Multimodal

- Llama 2-7B: —
- Yi-Lightning: —

| Benchmark | Llama 2-7B | Yi-Lightning |
|---|---|---|
| ScienceQA | 43.1% | — |

## Multilingual

- Llama 2-7B: 23.8 (#293)
- Yi-Lightning: 42.2 (#196)

| Benchmark | Llama 2-7B | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 973 | 1269 |
| LMArena Chinese | 973 | 1320 |
| LMArena French | 970 | 1305 |
| LMArena German | 978 | 1267 |
| LMArena Russian | 995 | 1255 |
| LMArena Spanish | 1007 | 1315 |
| LMArena Japanese | — | 1228 |
| LMArena Korean | — | 1192 |

## Instruction Following

- Llama 2-7B: 50.8 (#298)
- Yi-Lightning: 67.4 (#196)

| Benchmark | Llama 2-7B | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1006 | 1278 |

## Long Context

- Llama 2-7B: 30.4 (#287)
- Yi-Lightning: 39.4 (#181)

| Benchmark | Llama 2-7B | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 999 | 1297 |

## Writing & Preference

- Llama 2-7B: 28.0 (#298)
- Yi-Lightning: 50.2 (#184)

| Benchmark | Llama 2-7B | Yi-Lightning |
|---|---|---|
| LMArena Text | 1053 | 1302 |
| LMArena Creative Writing | 1033 | 1280 |
| LMArena Multi-Turn | 1029 | 1311 |

## FAQ

### Is Llama 2-7B better than Yi-Lightning?

Yi-Lightning is the stronger model overall, scoring 37.1 to 29.1 on the Noometry Index.

### Is Llama 2-7B or Yi-Lightning better for coding?

Llama 2-7B scores higher on coding benchmarks: 29.2 versus 27.4 in the Noometry coding category.

### How many benchmarks do Llama 2-7B and Yi-Lightning share?

15 benchmarks have published results for both models. Llama 2-7B has 29 scored results on Noometry and Yi-Lightning has 18.