Model comparison
Molmo 2 8b vs Muse Spark 1.2
Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 39.1 on the Noometry Index.
Last verified . 5 shared benchmarks.
Allen Institute for AI (Ai2)
MetaSummary
- They share 5 benchmarks with published results for both. Molmo 2 8b scores higher in 0 categories and Muse Spark 1.2 in 5 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.2 leads 51.3 to 25.6.
- Molmo 2 8b has downloadable open weights; the other is API-only.
Side by side
| Molmo 2 8b | Muse Spark 1.2 | |
|---|---|---|
| Provider | Allen Institute for AI (Ai2) | Meta |
| Noometry Index | 39.1 | 50.3 |
| Released | — | 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 | 5 | 31 |
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Category by category
Coding Not comparable
Molmo 2 8b: —, Muse Spark 1.2: 49.2 (#51)
| Benchmark | Molmo 2 8b | Muse Spark 1.2 |
|---|---|---|
| DeepSWE | — | 54.9% |
| LMArena WebDev | — | 1533 |
| FrontierSWE | — | 12% |
| SciCode | — | 56.4% |
| WeirdML | — | 60.3% |
| LMArena Coding | — | 1495 |
Agentic & Tool Use Not comparable
Molmo 2 8b: —, Muse Spark 1.2: 29.4 (#87)
| Benchmark | Molmo 2 8b | Muse Spark 1.2 |
|---|---|---|
| APEX-Agents | — | 36.4% |
| GDP.pdf | — | 16% |
Reasoning Muse Spark 1.2 leads
Molmo 2 8b: 25.6 (#146), Muse Spark 1.2: 51.3 (#34)
| Benchmark | Molmo 2 8b | Muse Spark 1.2 |
|---|---|---|
| LMArena Hard Prompts | 1287 | 1486 |
| SimpleBench | — | 74.5% |
| NYT Connections (extended) | — | 79.2% |
| CritPt | — | 17.7% |
| DTBench | — | 94.7% |
| LMCA | — | 48.4% |
| Epoch Capabilities Index | — | 154.87 |
Math Not comparable
Molmo 2 8b: —, Muse Spark 1.2: 46.4 (#70)
| Benchmark | Molmo 2 8b | Muse Spark 1.2 |
|---|---|---|
| ProofBench | — | 43% |
| LMArena Math | — | 1471 |
Knowledge Not comparable
Molmo 2 8b: —, Muse Spark 1.2: 54.1 (#53)
| Benchmark | Molmo 2 8b | Muse Spark 1.2 |
|---|---|---|
| SimpleQA Verified | — | 60.3% |
| LMArena Expert | — | 1480 |
Multimodal Muse Spark 1.2 leads
Molmo 2 8b: 30.2 (#112), Muse Spark 1.2: 43.4 (#25)
| Benchmark | Molmo 2 8b | Muse Spark 1.2 |
|---|---|---|
| LMArena Vision | 1081 | 1305 |
Multilingual Muse Spark 1.2 leads
Molmo 2 8b: 42.7 (#190), Muse Spark 1.2: 57.1 (#11)
| Benchmark | Molmo 2 8b | Muse Spark 1.2 |
|---|---|---|
| LMArena Non-English | 1276 | 1478 |
| LMArena Chinese | — | 1511 |
| LMArena French | — | 1513 |
| LMArena Russian | — | 1487 |
| LMArena Spanish | — | 1498 |
Instruction Following Muse Spark 1.2 leads
Molmo 2 8b: 67.0 (#201), Muse Spark 1.2: 76.7 (#36)
| Benchmark | Molmo 2 8b | Muse Spark 1.2 |
|---|---|---|
| LMArena Instruction Following | 1270 | 1461 |
Long Context Not comparable
Molmo 2 8b: —, Muse Spark 1.2: 45.2 (#48)
| Benchmark | Molmo 2 8b | Muse Spark 1.2 |
|---|---|---|
| LMArena Longer Query | — | 1475 |
Writing & Preference Muse Spark 1.2 leads
Molmo 2 8b: 49.4 (#191), Muse Spark 1.2: 72.3 (#14)
| Benchmark | Molmo 2 8b | Muse Spark 1.2 |
|---|---|---|
| LMArena Text | 1288 | 1482 |
| LMArena Creative Writing | — | 1449 |
| EQ-Bench Creative Writing | — | 1840 |
| LMArena Multi-Turn | — | 1494 |
Frequently asked questions
Is Molmo 2 8b better than Muse Spark 1.2?
Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 39.1 on the Noometry Index.
How many benchmarks do Molmo 2 8b and Muse Spark 1.2 share?
5 benchmarks have published results for both models. Molmo 2 8b has 5 scored results on Noometry and Muse Spark 1.2 has 31.