# Molmo 2 8b vs Solar Pro4

> Solar Pro4 is the stronger model overall, scoring 41.5 to 38.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/molmo-2-8b-vs-solar-pro4
- Last updated: 2026-10-10
- Shared benchmarks: 4

## Summary

- They share 4 benchmarks with published results for both. Molmo 2 8b scores higher in 0 categories and Solar Pro4 in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Solar Pro4 leads 56.7 to 49.5.
- Molmo 2 8b has downloadable open weights; the other is API-only.

## Snapshot

| | Molmo 2 8b | Solar Pro4 |
|---|---|---|
| Provider | Allen Institute for AI (Ai2) | Upstage |
| Noometry Index | 38.7 | 41.5 |
| Rank | 170 | 123 |
| Context | — | 524K |
| Input $/M | — | $0.30 |
| Output $/M | — | $1.20 |
| Weights | Open | Proprietary |

## Coding

- Molmo 2 8b: —
- Solar Pro4: 39.9 (#135)

| Benchmark | Molmo 2 8b | Solar Pro4 |
|---|---|---|
| LMArena WebDev | — | 1371 |
| LMArena Coding | — | 1439 |

## Reasoning

- Molmo 2 8b: 24.5 (#146)
- Solar Pro4: 27.3 (#107)

| Benchmark | Molmo 2 8b | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1288 | 1398 |

## Math

- Molmo 2 8b: —
- Solar Pro4: 36.1 (#129)

| Benchmark | Molmo 2 8b | Solar Pro4 |
|---|---|---|
| LMArena Math | — | 1418 |

## Knowledge

- Molmo 2 8b: —
- Solar Pro4: 39.0 (#128)

| Benchmark | Molmo 2 8b | Solar Pro4 |
|---|---|---|
| LMArena Expert | — | 1421 |

## Multimodal

- Molmo 2 8b: 29.5 (#106)
- Solar Pro4: —

| Benchmark | Molmo 2 8b | Solar Pro4 |
|---|---|---|
| LMArena Vision | 1081 | — |

## Multilingual

- Molmo 2 8b: 42.8 (#186)
- Solar Pro4: 49.0 (#134)

| Benchmark | Molmo 2 8b | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1275 | 1362 |
| LMArena Chinese | — | 1417 |
| LMArena French | — | 1403 |
| LMArena German | — | 1351 |
| LMArena Japanese | — | 1300 |
| LMArena Korean | — | 1383 |
| LMArena Russian | — | 1360 |
| LMArena Spanish | — | 1408 |

## Instruction Following

- Molmo 2 8b: 67.2 (#196)
- Solar Pro4: 72.8 (#128)

| Benchmark | Molmo 2 8b | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1270 | 1376 |

## Long Context

- Molmo 2 8b: —
- Solar Pro4: 42.0 (#125)

| Benchmark | Molmo 2 8b | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | — | 1379 |

## Writing & Preference

- Molmo 2 8b: 49.5 (#187)
- Solar Pro4: 56.7 (#133)

| Benchmark | Molmo 2 8b | Solar Pro4 |
|---|---|---|
| LMArena Text | 1288 | 1386 |
| LMArena Creative Writing | — | 1313 |
| LMArena Multi-Turn | — | 1391 |

## FAQ

### Is Molmo 2 8b better than Solar Pro4?

Solar Pro4 is the stronger model overall, scoring 41.5 to 38.7 on the Noometry Index.

### How many benchmarks do Molmo 2 8b and Solar Pro4 share?

4 benchmarks have published results for both models. Molmo 2 8b has 5 scored results on Noometry and Solar Pro4 has 18.