# Muse Spark 1.2 vs Yi-Lightning

> Muse Spark 1.2 is the stronger model overall, scoring 49.8 to 36.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/muse-spark-1-2-vs-yi-lightning
- Last updated: 2026-10-10
- Shared benchmarks: 11

## Summary

- They share 11 benchmarks with published results for both. Muse Spark 1.2 scores higher in 8 categories and Yi-Lightning in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.2 leads 50.4 to 24.9.

## Snapshot

| | Muse Spark 1.2 | Yi-Lightning |
|---|---|---|
| Provider | Meta | 01.AI |
| Noometry Index | 49.8 | 36.5 |
| Rank | 44 | 206 |
| Context | 1.05M | — |
| Input $/M | $1.25 | — |
| Output $/M | $4.25 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Muse Spark 1.2: 48.6 (#49)
- Yi-Lightning: 27.0 (#315)

| Benchmark | Muse Spark 1.2 | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1497 | 1313 |
| DeepSWE | 54.9% | — |
| Aider Polyglot | — | 12.9% |
| LMArena WebDev | 1532 | — |
| FrontierSWE | 12% | — |
| SciCode | 56.4% | — |
| WeirdML | 60.3% | — |

## Agentic & Tool Use

- Muse Spark 1.2: 29.5 (#77)
- Yi-Lightning: —

| Benchmark | Muse Spark 1.2 | Yi-Lightning |
|---|---|---|
| APEX-Agents | 36.4% | — |
| GDP.pdf | 16% | — |

## Reasoning

- Muse Spark 1.2: 50.4 (#32)
- Yi-Lightning: 24.9 (#137)

| Benchmark | Muse Spark 1.2 | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1490 | 1302 |
| SimpleBench | 74.5% | — |
| NYT Connections (extended) | 79.2% | — |
| CritPt | 17.7% | — |
| DTBench | 94.7% | — |
| LMCA | 48.4% | — |
| Epoch Capabilities Index | 155.18 | — |

## Math

- Muse Spark 1.2: 43.8 (#68)
- Yi-Lightning: 33.5 (#173)

| Benchmark | Muse Spark 1.2 | Yi-Lightning |
|---|---|---|
| ProofBench | 43% | — |
| LMArena Math | — | 1300 |

## Knowledge

- Muse Spark 1.2: 53.9 (#49)
- Yi-Lightning: 34.8 (#182)

| Benchmark | Muse Spark 1.2 | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1485 | 1286 |
| SimpleQA Verified | 60.3% | — |

## Multimodal

- Muse Spark 1.2: 42.6 (#24)
- Yi-Lightning: —

| Benchmark | Muse Spark 1.2 | Yi-Lightning |
|---|---|---|
| LMArena Vision | 1304 | — |

## Multilingual

- Muse Spark 1.2: 57.4 (#10)
- Yi-Lightning: 42.4 (#191)

| Benchmark | Muse Spark 1.2 | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1479 | 1269 |
| LMArena Chinese | 1519 | 1320 |
| LMArena Russian | 1494 | 1255 |
| LMArena French | — | 1304 |
| LMArena German | — | 1267 |
| LMArena Japanese | — | 1228 |
| LMArena Korean | — | 1192 |
| LMArena Spanish | — | 1315 |

## Instruction Following

- Muse Spark 1.2: 77.1 (#30)
- Yi-Lightning: 67.6 (#191)

| Benchmark | Muse Spark 1.2 | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1466 | 1278 |

## Long Context

- Muse Spark 1.2: 45.4 (#35)
- Yi-Lightning: 39.4 (#176)

| Benchmark | Muse Spark 1.2 | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1483 | 1297 |

## Writing & Preference

- Muse Spark 1.2: 72.6 (#14)
- Yi-Lightning: 50.4 (#178)

| Benchmark | Muse Spark 1.2 | Yi-Lightning |
|---|---|---|
| LMArena Text | 1486 | 1302 |
| LMArena Creative Writing | 1444 | 1280 |
| LMArena Multi-Turn | 1504 | 1311 |
| EQ-Bench Creative Writing | 1840 | — |

## FAQ

### Is Muse Spark 1.2 better than Yi-Lightning?

Muse Spark 1.2 is the stronger model overall, scoring 49.8 to 36.5 on the Noometry Index.

### Is Muse Spark 1.2 or Yi-Lightning better for coding?

Muse Spark 1.2 scores higher on coding benchmarks: 48.6 versus 27.0 in the Noometry coding category.

### How many benchmarks do Muse Spark 1.2 and Yi-Lightning share?

11 benchmarks have published results for both models. Muse Spark 1.2 has 28 scored results on Noometry and Yi-Lightning has 18.