# GLM-5.1 vs Yi-Lightning

> GLM-5.1 is the stronger model overall, scoring 47.8 to 37.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/glm-5-1-vs-yi-lightning
- Last updated: 2026-10-11
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. GLM-5.1 scores higher in 8 categories and Yi-Lightning in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in coding, where GLM-5.1 leads 48.7 to 27.4.
- GLM-5.1 has downloadable open weights; the other is API-only.

## Snapshot

| | GLM-5.1 | Yi-Lightning |
|---|---|---|
| Provider | Z.ai (Zhipu) | 01.AI |
| Noometry Index | 47.8 | 37.1 |
| Rank | 59 | 209 |
| Context | 200K | — |
| Input $/M | $1.40 | — |
| Output $/M | $4.40 | — |
| Weights | Open | Proprietary |

## Coding

- GLM-5.1: 48.7 (#55)
- Yi-Lightning: 27.4 (#320)

| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1485 | 1312 |
| SWE-bench Verified | 74.2% | — |
| Aider Polyglot | — | 12.9% |
| LMArena WebDev | 1508 | — |
| SciCode | 43.8% | — |
| WeirdML | 57.1% | — |
| ALE-Bench | 887.1 | — |

## Agentic & Tool Use

- GLM-5.1: 24.9 (#113)
- Yi-Lightning: —

| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| APEX-Agents | 40.9% | — |
| ExploitBench | 18.1% | — |
| GBAEval | 0% | — |
| Vending-Bench 2 | 5,634 | — |

## Reasoning

- GLM-5.1: 39.1 (#60)
- Yi-Lightning: 25.9 (#139)

| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1472 | 1302 |
| SimpleBench | 55.1% | — |
| NYT Connections (extended) | 77.7% | — |
| CritPt | 4.6% | — |
| Chess Puzzles | 19% | — |
| Thematic Generalization | 69.8% | — |
| Epoch Capabilities Index | 149.84 | — |

## Math

- GLM-5.1: 49.7 (#60)
- Yi-Lightning: 36.2 (#172)

| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Math | 1473 | 1300 |
| FrontierMath (Tiers 1-3) | 36.8% | — |
| MathArena Final-Answer Competitions | 67.1% | — |
| OTIS Mock AIME 2024-2025 | 93.3% | — |
| ProofBench | 22.2% | — |
| FrontierMath (Feb 2025 set) | 33.4% | — |
| FrontierMath Tier 4 (v1) | 12.5% | — |

## Knowledge

- GLM-5.1: 54.9 (#50)
- Yi-Lightning: 35.4 (#185)

| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1476 | 1286 |
| GPQA Diamond | 89.9% | — |
| SimpleQA Verified | 34% | — |

## Multilingual

- GLM-5.1: 55.0 (#36)
- Yi-Lightning: 42.2 (#196)

| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1447 | 1269 |
| LMArena Chinese | 1515 | 1320 |
| LMArena French | 1474 | 1305 |
| LMArena German | 1465 | 1267 |
| LMArena Japanese | 1434 | 1228 |
| LMArena Korean | 1418 | 1192 |
| LMArena Russian | 1454 | 1255 |
| LMArena Spanish | 1469 | 1315 |

## Instruction Following

- GLM-5.1: 76.3 (#42)
- Yi-Lightning: 67.4 (#196)

| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1451 | 1278 |

## Long Context

- GLM-5.1: 44.9 (#53)
- Yi-Lightning: 39.4 (#181)

| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1466 | 1297 |

## Writing & Preference

- GLM-5.1: 66.9 (#31)
- Yi-Lightning: 50.2 (#184)

| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Text | 1461 | 1302 |
| LMArena Creative Writing | 1453 | 1280 |
| LMArena Multi-Turn | 1472 | 1311 |
| EQ-Bench Creative Writing | 1592 | — |

## FAQ

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

GLM-5.1 is the stronger model overall, scoring 47.8 to 37.1 on the Noometry Index.

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

GLM-5.1 scores higher on coding benchmarks: 48.7 versus 27.4 in the Noometry coding category.

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

17 benchmarks have published results for both models. GLM-5.1 has 41 scored results on Noometry and Yi-Lightning has 18.