# Molmo 2 8b vs Muse Spark

> Muse Spark is the stronger model overall, scoring 50.3 to 38.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/molmo-2-8b-vs-muse-spark
- Last updated: 2026-10-10
- Shared benchmarks: 5

## Summary

- They share 5 benchmarks with published results for both. Molmo 2 8b scores higher in 0 categories and Muse Spark in 5 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Muse Spark leads 66.2 to 49.5.
- Molmo 2 8b has downloadable open weights; the other is API-only.

## Snapshot

| | Molmo 2 8b | Muse Spark |
|---|---|---|
| Provider | Allen Institute for AI (Ai2) | Meta |
| Noometry Index | 38.7 | 50.3 |
| Rank | 170 | 41 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Open | Proprietary |

## Coding

- Molmo 2 8b: —
- Muse Spark: 45.6 (#65)

| Benchmark | Molmo 2 8b | Muse Spark |
|---|---|---|
| SciCode | — | 51.5% |
| LMArena Coding | — | 1482 |

## Reasoning

- Molmo 2 8b: 24.5 (#146)
- Muse Spark: 34.9 (#61)

| Benchmark | Molmo 2 8b | Muse Spark |
|---|---|---|
| LMArena Hard Prompts | 1288 | 1475 |
| CritPt | — | 11.3% |
| Epoch Capabilities Index | — | 152.09 |

## Math

- Molmo 2 8b: —
- Muse Spark: 46.8 (#57)

| Benchmark | Molmo 2 8b | Muse Spark |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 88.9% |
| ProofBench | — | 17% |
| LMArena Math | — | 1455 |
| FrontierMath (Feb 2025 set) | — | 39% |
| FrontierMath Tier 4 (v1) | — | 14.6% |

## Knowledge

- Molmo 2 8b: —
- Muse Spark: 65.7 (#12)

| Benchmark | Molmo 2 8b | Muse Spark |
|---|---|---|
| GPQA Diamond | — | 89.8% |
| Humanity's Last Exam | — | 40.6% |
| LMArena Expert | — | 1458 |

## Multimodal

- Molmo 2 8b: 29.5 (#106)
- Muse Spark: 42.7 (#23)

| Benchmark | Molmo 2 8b | Muse Spark |
|---|---|---|
| LMArena Vision | 1081 | 1306 |
| LMArena Document | — | 1444 |

## Multilingual

- Molmo 2 8b: 42.8 (#186)
- Muse Spark: 56.3 (#23)

| Benchmark | Molmo 2 8b | Muse Spark |
|---|---|---|
| LMArena Non-English | 1275 | 1464 |
| LMArena Chinese | — | 1507 |
| LMArena French | — | 1497 |
| LMArena German | — | 1497 |
| LMArena Korean | — | 1457 |
| LMArena Russian | — | 1467 |
| LMArena Spanish | — | 1471 |

## Instruction Following

- Molmo 2 8b: 67.2 (#196)
- Muse Spark: 76.1 (#47)

| Benchmark | Molmo 2 8b | Muse Spark |
|---|---|---|
| LMArena Instruction Following | 1270 | 1443 |

## Long Context

- Molmo 2 8b: —
- Muse Spark: 44.4 (#65)

| Benchmark | Molmo 2 8b | Muse Spark |
|---|---|---|
| LMArena Longer Query | — | 1451 |

## Writing & Preference

- Molmo 2 8b: 49.5 (#187)
- Muse Spark: 66.2 (#37)

| Benchmark | Molmo 2 8b | Muse Spark |
|---|---|---|
| LMArena Text | 1288 | 1474 |
| LMArena Creative Writing | — | 1460 |
| LMArena Multi-Turn | — | 1477 |

## FAQ

### Is Molmo 2 8b better than Muse Spark?

Muse Spark is the stronger model overall, scoring 50.3 to 38.7 on the Noometry Index.

### How many benchmarks do Molmo 2 8b and Muse Spark share?

5 benchmarks have published results for both models. Molmo 2 8b has 5 scored results on Noometry and Muse Spark has 27.