Model comparison
Muse Glimmer vs Muse Spark 1.2
Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 41.7 on the Noometry Index.
Last verified . 15 shared benchmarks.
MetaSummary
- They share 15 benchmarks with published results for both. Muse Glimmer scores higher in 0 categories and Muse Spark 1.2 in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.2 leads 51.3 to 25.7.
- The biggest single-benchmark swing is CritPt: 2.6% for Muse Glimmer and 17.7% for Muse Spark 1.2.
- Muse Glimmer has downloadable open weights; the other is API-only.
Side by side
| Muse Glimmer | Muse Spark 1.2 | |
|---|---|---|
| Provider | Meta | Meta |
| Noometry Index | 41.7 | 50.3 |
| Released | 2026-08-10 | 2026-08-05 |
| Weights | Open | Proprietary |
| Context window | — | 1.05M |
| Max output | — | 131K |
| Input $ / M tokens | — | $1.25 |
| Output $ / M tokens | — | $4.25 |
| Results tracked | 15 | 31 |
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Category by category
Coding Muse Spark 1.2 leads
Muse Glimmer: 40.4 (#142), Muse Spark 1.2: 49.2 (#51)
| Benchmark | Muse Glimmer | Muse Spark 1.2 |
|---|---|---|
| LMArena WebDev | 1355 | 1533 |
| SciCode | 44.9% | 56.4% |
| LMArena Coding | 1416 | 1495 |
| DeepSWE | — | 54.9% |
| FrontierSWE | — | 12% |
| WeirdML | — | 60.3% |
Agentic & Tool Use Not comparable
Muse Glimmer: —, Muse Spark 1.2: 29.4 (#87)
| Benchmark | Muse Glimmer | Muse Spark 1.2 |
|---|---|---|
| APEX-Agents | — | 36.4% |
| GDP.pdf | — | 16% |
Reasoning Muse Spark 1.2 leads
Muse Glimmer: 25.7 (#144), Muse Spark 1.2: 51.3 (#34)
| Benchmark | Muse Glimmer | Muse Spark 1.2 |
|---|---|---|
| CritPt | 2.6% | 17.7% |
| LMArena Hard Prompts | 1396 | 1486 |
| SimpleBench | — | 74.5% |
| NYT Connections (extended) | — | 79.2% |
| DTBench | — | 94.7% |
| LMCA | — | 48.4% |
| Epoch Capabilities Index | — | 154.87 |
Math Muse Spark 1.2 leads
Muse Glimmer: 38.8 (#125), Muse Spark 1.2: 46.4 (#70)
| Benchmark | Muse Glimmer | Muse Spark 1.2 |
|---|---|---|
| LMArena Math | 1417 | 1471 |
| ProofBench | — | 43% |
Knowledge Muse Spark 1.2 leads
Muse Glimmer: 38.5 (#143), Muse Spark 1.2: 54.1 (#53)
| Benchmark | Muse Glimmer | Muse Spark 1.2 |
|---|---|---|
| LMArena Expert | 1386 | 1480 |
| SimpleQA Verified | — | 60.3% |
Multimodal Not comparable
Muse Glimmer: —, Muse Spark 1.2: 43.4 (#25)
| Benchmark | Muse Glimmer | Muse Spark 1.2 |
|---|---|---|
| LMArena Vision | — | 1305 |
Multilingual Muse Spark 1.2 leads
Muse Glimmer: 50.5 (#122), Muse Spark 1.2: 57.1 (#11)
| Benchmark | Muse Glimmer | Muse Spark 1.2 |
|---|---|---|
| LMArena Non-English | 1384 | 1478 |
| LMArena Chinese | 1412 | 1511 |
| LMArena Russian | 1390 | 1487 |
| LMArena French | — | 1513 |
| LMArena Spanish | — | 1498 |
Instruction Following Muse Spark 1.2 leads
Muse Glimmer: 72.6 (#135), Muse Spark 1.2: 76.7 (#36)
| Benchmark | Muse Glimmer | Muse Spark 1.2 |
|---|---|---|
| LMArena Instruction Following | 1375 | 1461 |
Long Context Muse Spark 1.2 leads
Muse Glimmer: 42.1 (#129), Muse Spark 1.2: 45.2 (#48)
| Benchmark | Muse Glimmer | Muse Spark 1.2 |
|---|---|---|
| LMArena Longer Query | 1382 | 1475 |
Writing & Preference Muse Spark 1.2 leads
Muse Glimmer: 57.5 (#126), Muse Spark 1.2: 72.3 (#14)
| Benchmark | Muse Glimmer | Muse Spark 1.2 |
|---|---|---|
| LMArena Text | 1389 | 1482 |
| LMArena Creative Writing | 1339 | 1449 |
| LMArena Multi-Turn | 1399 | 1494 |
| EQ-Bench Creative Writing | — | 1840 |
Frequently asked questions
Is Muse Glimmer better than Muse Spark 1.2?
Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 41.7 on the Noometry Index.
Is Muse Glimmer or Muse Spark 1.2 better for coding?
Muse Spark 1.2 scores higher on coding benchmarks: 49.2 versus 40.4 in the Noometry coding category.
How many benchmarks do Muse Glimmer and Muse Spark 1.2 share?
15 benchmarks have published results for both models. Muse Glimmer has 15 scored results on Noometry and Muse Spark 1.2 has 31.