# Muse Spark 1.2 vs Yi-1.5-34B

> Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 30.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/muse-spark-1-2-vs-yi-1-5-34b
- Last updated: 2026-10-12
- Shared benchmarks: 14

## Summary

- They share 14 benchmarks with published results for both. Muse Spark 1.2 scores higher in 8 categories and Yi-1.5-34B in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Muse Spark 1.2 leads 54.1 to 14.8.
- Yi-1.5-34B has downloadable open weights; the other is API-only.

## Snapshot

| | Muse Spark 1.2 | Yi-1.5-34B |
|---|---|---|
| Provider | Meta | 01.AI |
| Noometry Index | 50.3 | 30.6 |
| Rank | 48 | 289 |
| Context | 1.05M | — |
| Input $/M | $1.25 | — |
| Output $/M | $4.25 | — |
| Weights | Proprietary | Open |

## Coding

- Muse Spark 1.2: 49.2 (#51)
- Yi-1.5-34B: 32.4 (#272)

| Benchmark | Muse Spark 1.2 | Yi-1.5-34B |
|---|---|---|
| LMArena Coding | 1495 | 1169 |
| DeepSWE | 54.9% | — |
| LMArena WebDev | 1533 | — |
| FrontierSWE | 12% | — |
| SciCode | 56.4% | — |
| WeirdML | 60.3% | — |
| BigCodeBench Instruct | — | 33.9% |
| BigCodeBench Complete | — | 43.8% |

## Agentic & Tool Use

- Muse Spark 1.2: 29.4 (#87)
- Yi-1.5-34B: —

| Benchmark | Muse Spark 1.2 | Yi-1.5-34B |
|---|---|---|
| APEX-Agents | 36.4% | — |
| GDP.pdf | 16% | — |

## Reasoning

- Muse Spark 1.2: 51.3 (#34)
- Yi-1.5-34B: 22.5 (#191)

| Benchmark | Muse Spark 1.2 | Yi-1.5-34B |
|---|---|---|
| LMArena Hard Prompts | 1486 | 1160 |
| SimpleBench | 74.5% | — |
| NYT Connections (extended) | 79.2% | — |
| CritPt | 17.7% | — |
| DTBench | 94.7% | — |
| LMCA | 48.4% | — |
| Epoch Capabilities Index | 154.87 | — |

## Math

- Muse Spark 1.2: 46.4 (#70)
- Yi-1.5-34B: 27.5 (#249)

| Benchmark | Muse Spark 1.2 | Yi-1.5-34B |
|---|---|---|
| LMArena Math | 1471 | 1182 |
| ProofBench | 43% | — |
| MATH Level 5 | — | 25.5% |

## Knowledge

- Muse Spark 1.2: 54.1 (#53)
- Yi-1.5-34B: 14.8 (#295)

| Benchmark | Muse Spark 1.2 | Yi-1.5-34B |
|---|---|---|
| LMArena Expert | 1480 | 1144 |
| GPQA Diamond | — | 32% |
| SimpleQA Verified | 60.3% | — |

## Multimodal

- Muse Spark 1.2: 43.4 (#25)
- Yi-1.5-34B: —

| Benchmark | Muse Spark 1.2 | Yi-1.5-34B |
|---|---|---|
| LMArena Vision | 1305 | — |

## Multilingual

- Muse Spark 1.2: 57.1 (#11)
- Yi-1.5-34B: 32.3 (#256)

| Benchmark | Muse Spark 1.2 | Yi-1.5-34B |
|---|---|---|
| LMArena Non-English | 1478 | 1121 |
| LMArena Chinese | 1511 | 1213 |
| LMArena French | 1513 | 1156 |
| LMArena Russian | 1487 | 1091 |
| LMArena Spanish | 1498 | 1121 |
| LMArena German | — | 1111 |
| LMArena Japanese | — | 1021 |
| LMArena Korean | — | 1005 |

## Instruction Following

- Muse Spark 1.2: 76.7 (#36)
- Yi-1.5-34B: 59.2 (#257)

| Benchmark | Muse Spark 1.2 | Yi-1.5-34B |
|---|---|---|
| LMArena Instruction Following | 1461 | 1139 |

## Long Context

- Muse Spark 1.2: 45.2 (#48)
- Yi-1.5-34B: 34.6 (#248)

| Benchmark | Muse Spark 1.2 | Yi-1.5-34B |
|---|---|---|
| LMArena Longer Query | 1475 | 1143 |

## Writing & Preference

- Muse Spark 1.2: 72.3 (#14)
- Yi-1.5-34B: 37.4 (#257)

| Benchmark | Muse Spark 1.2 | Yi-1.5-34B |
|---|---|---|
| LMArena Text | 1482 | 1173 |
| LMArena Creative Writing | 1449 | 1135 |
| LMArena Multi-Turn | 1494 | 1153 |
| EQ-Bench Creative Writing | 1840 | — |

## FAQ

### Is Muse Spark 1.2 better than Yi-1.5-34B?

Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 30.6 on the Noometry Index.

### Is Muse Spark 1.2 or Yi-1.5-34B better for coding?

Muse Spark 1.2 scores higher on coding benchmarks: 49.2 versus 32.4 in the Noometry coding category.

### How many benchmarks do Muse Spark 1.2 and Yi-1.5-34B share?

14 benchmarks have published results for both models. Muse Spark 1.2 has 31 scored results on Noometry and Yi-1.5-34B has 21.