Model comparison
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.
Last verified . 14 shared benchmarks.
MetaSummary
- 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.
Side by side
| Muse Spark 1.2 | Yi-1.5-34B | |
|---|---|---|
| Provider | Meta | 01.AI |
| Noometry Index | 50.3 | 30.6 |
| Released | 2026-08-05 | 2024-05-13 |
| Weights | Proprietary | Open |
| Context window | 1.05M | — |
| Max output | 131K | — |
| Input $ / M tokens | $1.25 | — |
| Output $ / M tokens | $4.25 | — |
| Results tracked | 31 | 21 |
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Category by category
Coding Muse Spark 1.2 leads
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 Not comparable
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 leads
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 leads
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 leads
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 Not comparable
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 leads
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 leads
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 leads
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 leads
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 | — |
Frequently asked questions
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.