# Molmo 2 8b vs Qwen1.5 4b Chat

> Molmo 2 8b is the stronger model overall, scoring 38.7 to 28.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/molmo-2-8b-vs-qwen1-5-4b-chat
- Last updated: 2026-10-10
- Shared benchmarks: 4

## Summary

- They share 4 benchmarks with published results for both. Molmo 2 8b scores higher in 4 categories and Qwen1.5 4b Chat in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Molmo 2 8b leads 49.5 to 23.9.

## Snapshot

| | Molmo 2 8b | Qwen1.5 4b Chat |
|---|---|---|
| Provider | Allen Institute for AI (Ai2) | Alibaba (Qwen) |
| Noometry Index | 38.7 | 28.3 |
| Rank | 170 | 319 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Open | Open |

## Coding

- Molmo 2 8b: —
- Qwen1.5 4b Chat: 28.6 (#305)

| Benchmark | Molmo 2 8b | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Coding | — | 999 |

## Reasoning

- Molmo 2 8b: 24.5 (#146)
- Qwen1.5 4b Chat: 17.7 (#277)

| Benchmark | Molmo 2 8b | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Hard Prompts | 1288 | 976 |

## Math

- Molmo 2 8b: —
- Qwen1.5 4b Chat: 27.9 (#233)

| Benchmark | Molmo 2 8b | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Math | — | 1026 |

## Knowledge

- Molmo 2 8b: —
- Qwen1.5 4b Chat: 26.2 (#252)

| Benchmark | Molmo 2 8b | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Expert | — | 980 |

## Multimodal

- Molmo 2 8b: 29.5 (#106)
- Qwen1.5 4b Chat: —

| Benchmark | Molmo 2 8b | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Vision | 1081 | — |

## Multilingual

- Molmo 2 8b: 42.8 (#186)
- Qwen1.5 4b Chat: 24.2 (#285)

| Benchmark | Molmo 2 8b | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Non-English | 1275 | 979 |
| LMArena Chinese | — | 1024 |
| LMArena German | — | 902 |
| LMArena Russian | — | 952 |

## Instruction Following

- Molmo 2 8b: 67.2 (#196)
- Qwen1.5 4b Chat: 49.3 (#295)

| Benchmark | Molmo 2 8b | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Instruction Following | 1270 | 979 |

## Long Context

- Molmo 2 8b: —
- Qwen1.5 4b Chat: 30.1 (#285)

| Benchmark | Molmo 2 8b | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Longer Query | — | 988 |

## Writing & Preference

- Molmo 2 8b: 49.5 (#187)
- Qwen1.5 4b Chat: 23.9 (#304)

| Benchmark | Molmo 2 8b | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Text | 1288 | 997 |
| LMArena Creative Writing | — | 969 |
| LMArena Multi-Turn | — | 977 |

## FAQ

### Is Molmo 2 8b better than Qwen1.5 4b Chat?

Molmo 2 8b is the stronger model overall, scoring 38.7 to 28.3 on the Noometry Index.

### How many benchmarks do Molmo 2 8b and Qwen1.5 4b Chat share?

4 benchmarks have published results for both models. Molmo 2 8b has 5 scored results on Noometry and Qwen1.5 4b Chat has 13.