Model comparison
Molmo 2 8b vs Muse Spark 1.1
Muse Spark 1.1 is the stronger model overall, scoring 49.9 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 1.1 in 5 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Muse Spark 1.1 leads 73.4 to 49.4.
- Molmo 2 8b has downloadable open weights; the other is API-only.
Side by side
| Molmo 2 8b | Muse Spark 1.1 | |
|---|---|---|
| Provider | Allen Institute for AI (Ai2) | Meta |
| Noometry Index | 39.1 | 49.9 |
| Released | — | 2026-04-08 |
| Weights | Open | Proprietary |
| Context window | — | 1.05M |
| Max output | — | 131K |
| Input $ / M tokens | — | $1.25 |
| Output $ / M tokens | — | $4.25 |
| Results tracked | 5 | 37 |
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Category by category
Coding Not comparable
Molmo 2 8b: —, Muse Spark 1.1: 51.3 (#40)
| Benchmark | Molmo 2 8b | Muse Spark 1.1 |
|---|---|---|
| DeepSWE | — | 53.3% |
| LMArena WebDev | — | 1542 |
| SciCode | — | 58.8% |
| LMArena Coding | — | 1498 |
Agentic & Tool Use Not comparable
Molmo 2 8b: —, Muse Spark 1.1: 30.8 (#73)
| Benchmark | Molmo 2 8b | Muse Spark 1.1 |
|---|---|---|
| APEX-Agents | — | 31.8% |
| τ²-bench Banking | — | 40.5% |
| GBAEval | — | 7.9% |
| GDP.pdf | — | 15% |
| Vending-Bench 2 | — | 6,520 |
Reasoning Muse Spark 1.1 leads
Molmo 2 8b: 25.6 (#146), Muse Spark 1.1: 47.1 (#44)
| Benchmark | Molmo 2 8b | Muse Spark 1.1 |
|---|---|---|
| LMArena Hard Prompts | 1287 | 1486 |
| NYT Connections (extended) | — | 84.9% |
| CritPt | — | 15.1% |
| DTBench | — | 94.4% |
| LMCA | — | 49.9% |
| Surface Evolver Bench | — | 52.5% |
| Epoch Capabilities Index | — | 154.21 |
Math Not comparable
Molmo 2 8b: —, Muse Spark 1.1: 45.5 (#76)
| Benchmark | Molmo 2 8b | Muse Spark 1.1 |
|---|---|---|
| ProofBench | — | 39% |
| LMArena Math | — | 1483 |
Knowledge Not comparable
Molmo 2 8b: —, Muse Spark 1.1: 53.1 (#59)
| Benchmark | Molmo 2 8b | Muse Spark 1.1 |
|---|---|---|
| SimpleQA Verified | — | 57.8% |
| LMArena Expert | — | 1478 |
Multimodal Muse Spark 1.1 leads
Molmo 2 8b: 30.2 (#112), Muse Spark 1.1: 42.6 (#29)
| Benchmark | Molmo 2 8b | Muse Spark 1.1 |
|---|---|---|
| LMArena Vision | 1081 | 1293 |
| LMArena Document | — | 1465 |
Multilingual Muse Spark 1.1 leads
Molmo 2 8b: 42.7 (#190), Muse Spark 1.1: 56.7 (#17)
| Benchmark | Molmo 2 8b | Muse Spark 1.1 |
|---|---|---|
| LMArena Non-English | 1276 | 1472 |
| LMArena Chinese | — | 1518 |
| LMArena French | — | 1494 |
| LMArena German | — | 1466 |
| LMArena Japanese | — | 1451 |
| LMArena Korean | — | 1458 |
| LMArena Russian | — | 1483 |
| LMArena Spanish | — | 1464 |
Instruction Following Muse Spark 1.1 leads
Molmo 2 8b: 67.0 (#201), Muse Spark 1.1: 76.5 (#39)
| Benchmark | Molmo 2 8b | Muse Spark 1.1 |
|---|---|---|
| LMArena Instruction Following | 1270 | 1457 |
Long Context Not comparable
Molmo 2 8b: —, Muse Spark 1.1: 44.8 (#58)
| Benchmark | Molmo 2 8b | Muse Spark 1.1 |
|---|---|---|
| LMArena Longer Query | — | 1462 |
Writing & Preference Muse Spark 1.1 leads
Molmo 2 8b: 49.4 (#191), Muse Spark 1.1: 73.4 (#11)
| Benchmark | Molmo 2 8b | Muse Spark 1.1 |
|---|---|---|
| LMArena Text | 1288 | 1479 |
| LMArena Creative Writing | — | 1437 |
| EQ-Bench Creative Writing | — | 1927 |
| EQ-Bench 4 | — | 1260 |
| LMArena Multi-Turn | — | 1485 |
Frequently asked questions
Is Molmo 2 8b better than Muse Spark 1.1?
Muse Spark 1.1 is the stronger model overall, scoring 49.9 to 39.1 on the Noometry Index.
How many benchmarks do Molmo 2 8b and Muse Spark 1.1 share?
5 benchmarks have published results for both models. Molmo 2 8b has 5 scored results on Noometry and Muse Spark 1.1 has 37.