# Grok 4.1 vs Yi-Lightning

> Grok 4.1 is the stronger model overall, scoring 40.8 to 36.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-1-vs-yi-lightning
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Grok 4.1 scores higher in 8 categories and Yi-Lightning in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok 4.1 leads 62.6 to 50.4.

## Snapshot

| | Grok 4.1 | Yi-Lightning |
|---|---|---|
| Provider | xAI | 01.AI |
| Noometry Index | 40.8 | 36.5 |
| Rank | 135 | 206 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Proprietary |

## Coding

- Grok 4.1: 33.4 (#246)
- Yi-Lightning: 27.0 (#315)

| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1445 | 1313 |
| Aider Polyglot | — | 12.9% |
| LMArena WebDev | 1214 | — |

## Agentic & Tool Use

- Grok 4.1: 33.8 (#47)
- Yi-Lightning: —

| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| Cybench | 39% | — |

## Reasoning

- Grok 4.1: 28.3 (#91)
- Yi-Lightning: 24.9 (#137)

| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1436 | 1302 |

## Math

- Grok 4.1: 36.2 (#124)
- Yi-Lightning: 33.5 (#173)

| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Math | 1422 | 1300 |

## Knowledge

- Grok 4.1: 38.9 (#129)
- Yi-Lightning: 34.8 (#182)

| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1417 | 1286 |

## Multilingual

- Grok 4.1: 53.6 (#64)
- Yi-Lightning: 42.4 (#191)

| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1425 | 1269 |
| LMArena Chinese | 1464 | 1320 |
| LMArena French | 1448 | 1304 |
| LMArena German | 1447 | 1267 |
| LMArena Japanese | 1396 | 1228 |
| LMArena Korean | 1407 | 1192 |
| LMArena Russian | 1434 | 1255 |
| LMArena Spanish | 1438 | 1315 |

## Instruction Following

- Grok 4.1: 74.0 (#106)
- Yi-Lightning: 67.6 (#191)

| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1400 | 1278 |

## Long Context

- Grok 4.1: 43.2 (#96)
- Yi-Lightning: 39.4 (#176)

| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1416 | 1297 |

## Writing & Preference

- Grok 4.1: 62.6 (#71)
- Yi-Lightning: 50.4 (#178)

| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Text | 1437 | 1302 |
| LMArena Creative Writing | 1411 | 1280 |
| LMArena Multi-Turn | 1438 | 1311 |

## FAQ

### Is Grok 4.1 better than Yi-Lightning?

Grok 4.1 is the stronger model overall, scoring 40.8 to 36.5 on the Noometry Index.

### Is Grok 4.1 or Yi-Lightning better for coding?

Grok 4.1 scores higher on coding benchmarks: 33.4 versus 27.0 in the Noometry coding category.

### How many benchmarks do Grok 4.1 and Yi-Lightning share?

17 benchmarks have published results for both models. Grok 4.1 has 19 scored results on Noometry and Yi-Lightning has 18.