# Llama 2-70B vs Yi-Lightning

> Yi-Lightning is the stronger model overall, scoring 36.5 to 24.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/llama-2-70b-vs-yi-lightning
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Llama 2-70B scores higher in 1 category and Yi-Lightning in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Yi-Lightning leads 34.8 to 7.4.
- Llama 2-70B has downloadable open weights; the other is API-only.

## Snapshot

| | Llama 2-70B | Yi-Lightning |
|---|---|---|
| Provider | Meta | 01.AI |
| Noometry Index | 24.1 | 36.5 |
| Rank | 343 | 206 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Open | Proprietary |

## Coding

- Llama 2-70B: 30.8 (#281)
- Yi-Lightning: 27.0 (#315)

| Benchmark | Llama 2-70B | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1079 | 1313 |
| Aider Polyglot | — | 12.9% |

## Reasoning

- Llama 2-70B: 13.7 (#324)
- Yi-Lightning: 24.9 (#137)

| Benchmark | Llama 2-70B | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1073 | 1302 |
| DTBench | 41.6% | — |
| BIG-Bench Hard | 64.9% | — |
| CommonsenseQA 2.0 | 50% | — |
| Epoch Capabilities Index | 113.59 | — |
| ForecastBench | 51.4 | — |
| HellaSwag | 85.3% | — |
| LAMBADA | 78.9% | — |
| PIQA | 82.8% | — |
| WinoGrande | 80.2% | — |

## Math

- Llama 2-70B: 7.5 (#320)
- Yi-Lightning: 33.5 (#173)

| Benchmark | Llama 2-70B | Yi-Lightning |
|---|---|---|
| LMArena Math | 1091 | 1300 |
| OTIS Mock AIME 2024-2025 | 0% | — |
| MATH Level 5 | 3.3% | — |
| GSM8K | 69.6% | — |

## Knowledge

- Llama 2-70B: 7.4 (#305)
- Yi-Lightning: 34.8 (#182)

| Benchmark | Llama 2-70B | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1039 | 1286 |
| GPQA Diamond | 26.3% | — |
| ARC (AI2) Challenge | 78.3% | — |
| BoolQ | 88.6% | — |
| MMLU | 69.9% | — |
| OpenBookQA | 60.2% | — |
| TriviaQA | 87.6% | — |

## Multilingual

- Llama 2-70B: 27.9 (#269)
- Yi-Lightning: 42.4 (#191)

| Benchmark | Llama 2-70B | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1045 | 1269 |
| LMArena Chinese | 994 | 1320 |
| LMArena French | 1089 | 1304 |
| LMArena German | 1041 | 1267 |
| LMArena Japanese | 927 | 1228 |
| LMArena Korean | 964 | 1192 |
| LMArena Russian | 1083 | 1255 |
| LMArena Spanish | 1142 | 1315 |

## Instruction Following

- Llama 2-70B: 55.1 (#273)
- Yi-Lightning: 67.6 (#191)

| Benchmark | Llama 2-70B | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1071 | 1278 |

## Long Context

- Llama 2-70B: 32.2 (#265)
- Yi-Lightning: 39.4 (#176)

| Benchmark | Llama 2-70B | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1062 | 1297 |

## Writing & Preference

- Llama 2-70B: 32.5 (#274)
- Yi-Lightning: 50.4 (#178)

| Benchmark | Llama 2-70B | Yi-Lightning |
|---|---|---|
| LMArena Text | 1115 | 1302 |
| LMArena Creative Writing | 1075 | 1280 |
| LMArena Multi-Turn | 1088 | 1311 |

## FAQ

### Is Llama 2-70B better than Yi-Lightning?

Yi-Lightning is the stronger model overall, scoring 36.5 to 24.1 on the Noometry Index.

### Is Llama 2-70B or Yi-Lightning better for coding?

Llama 2-70B scores higher on coding benchmarks: 30.8 versus 27.0 in the Noometry coding category.

### How many benchmarks do Llama 2-70B and Yi-Lightning share?

17 benchmarks have published results for both models. Llama 2-70B has 35 scored results on Noometry and Yi-Lightning has 18.