# ERNIE 5.1 vs Yi-Lightning

> ERNIE 5.1 is the stronger model overall, scoring 43.8 to 37.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/ernie-5-1-vs-yi-lightning
- Last updated: 2026-10-12
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. ERNIE 5.1 scores higher in 7 categories and Yi-Lightning in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in coding, where ERNIE 5.1 leads 44.0 to 27.4.

## Snapshot

| | ERNIE 5.1 | Yi-Lightning |
|---|---|---|
| Provider | Baidu | 01.AI |
| Noometry Index | 43.8 | 37.1 |
| Rank | 83 | 209 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Proprietary |

## Coding

- ERNIE 5.1: 44.0 (#76)
- Yi-Lightning: 27.4 (#320)

| Benchmark | ERNIE 5.1 | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1488 | 1312 |
| Aider Polyglot | — | 12.9% |

## Agentic & Tool Use

- ERNIE 5.1: —
- Yi-Lightning: —

| Benchmark | ERNIE 5.1 | Yi-Lightning |
|---|---|---|
| LMArena Search | 1227 | — |

## Reasoning

- ERNIE 5.1: 21.9 (#211)
- Yi-Lightning: 25.9 (#139)

| Benchmark | ERNIE 5.1 | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1481 | 1302 |
| NYT Connections (extended) | 23.4% | — |

## Math

- ERNIE 5.1: 40.3 (#92)
- Yi-Lightning: 36.2 (#172)

| Benchmark | ERNIE 5.1 | Yi-Lightning |
|---|---|---|
| LMArena Math | 1481 | 1300 |

## Knowledge

- ERNIE 5.1: 41.9 (#102)
- Yi-Lightning: 35.4 (#185)

| Benchmark | ERNIE 5.1 | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1492 | 1286 |

## Multilingual

- ERNIE 5.1: 55.5 (#29)
- Yi-Lightning: 42.2 (#196)

| Benchmark | ERNIE 5.1 | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1454 | 1269 |
| LMArena Chinese | 1508 | 1320 |
| LMArena French | 1488 | 1305 |
| LMArena German | 1470 | 1267 |
| LMArena Japanese | 1422 | 1228 |
| LMArena Korean | 1427 | 1192 |
| LMArena Russian | 1459 | 1255 |
| LMArena Spanish | 1473 | 1315 |

## Instruction Following

- ERNIE 5.1: 76.7 (#37)
- Yi-Lightning: 67.4 (#196)

| Benchmark | ERNIE 5.1 | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1460 | 1278 |

## Long Context

- ERNIE 5.1: 44.7 (#59)
- Yi-Lightning: 39.4 (#181)

| Benchmark | ERNIE 5.1 | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1462 | 1297 |

## Writing & Preference

- ERNIE 5.1: 65.1 (#52)
- Yi-Lightning: 50.2 (#184)

| Benchmark | ERNIE 5.1 | Yi-Lightning |
|---|---|---|
| LMArena Text | 1468 | 1302 |
| LMArena Creative Writing | 1441 | 1280 |
| LMArena Multi-Turn | 1471 | 1311 |

## FAQ

### Is ERNIE 5.1 better than Yi-Lightning?

ERNIE 5.1 is the stronger model overall, scoring 43.8 to 37.1 on the Noometry Index.

### Is ERNIE 5.1 or Yi-Lightning better for coding?

ERNIE 5.1 scores higher on coding benchmarks: 44.0 versus 27.4 in the Noometry coding category.

### How many benchmarks do ERNIE 5.1 and Yi-Lightning share?

17 benchmarks have published results for both models. ERNIE 5.1 has 19 scored results on Noometry and Yi-Lightning has 18.