# Claude 3 Sonnet vs Molmo 2 8b

> Molmo 2 8b is the stronger model overall, scoring 39.1 to 29.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-3-sonnet-vs-molmo-2-8b
- Last updated: 2026-10-10
- Shared benchmarks: 5

## Summary

- They share 5 benchmarks with published results for both. Claude 3 Sonnet scores higher in 0 categories and Molmo 2 8b in 5 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Molmo 2 8b leads 49.4 to 42.1.
- Molmo 2 8b has downloadable open weights; the other is API-only.

## Snapshot

| | Claude 3 Sonnet | Molmo 2 8b |
|---|---|---|
| Provider | Anthropic | Allen Institute for AI (Ai2) |
| Noometry Index | 29.0 | 39.1 |
| Rank | 319 | 174 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- Claude 3 Sonnet: 29.6 (#302)
- Molmo 2 8b: —

| Benchmark | Claude 3 Sonnet | Molmo 2 8b |
|---|---|---|
| WeirdML | 10.2% | — |
| BigCodeBench Instruct | 42.7% | — |
| LMArena Coding | 1223 | — |
| BigCodeBench Complete | 53.8% | — |
| HumanEval+ | 64% | — |
| MBPP+ | 69.3% | — |

## Reasoning

- Claude 3 Sonnet: 20.5 (#237)
- Molmo 2 8b: 25.6 (#146)

| Benchmark | Claude 3 Sonnet | Molmo 2 8b |
|---|---|---|
| LMArena Hard Prompts | 1197 | 1287 |
| DTBench | 53.6% | — |
| Epoch Capabilities Index | 120.7 | — |
| WinoGrande | 75.1% | — |

## Math

- Claude 3 Sonnet: 10.7 (#310)
- Molmo 2 8b: —

| Benchmark | Claude 3 Sonnet | Molmo 2 8b |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.5% | — |
| LMArena Math | 1213 | — |
| MATH Level 5 | 18.2% | — |

## Knowledge

- Claude 3 Sonnet: 21.1 (#276)
- Molmo 2 8b: —

| Benchmark | Claude 3 Sonnet | Molmo 2 8b |
|---|---|---|
| GPQA Diamond | 40.6% | — |
| LMArena Expert | 1173 | — |
| MMLU | 75.9% | — |

## Multimodal

- Claude 3 Sonnet: 25.2 (#125)
- Molmo 2 8b: 30.2 (#112)

| Benchmark | Claude 3 Sonnet | Molmo 2 8b |
|---|---|---|
| LMArena Vision | 984 | 1081 |

## Multilingual

- Claude 3 Sonnet: 37.8 (#234)
- Molmo 2 8b: 42.7 (#190)

| Benchmark | Claude 3 Sonnet | Molmo 2 8b |
|---|---|---|
| LMArena Non-English | 1205 | 1276 |
| LMArena Chinese | 1189 | — |
| LMArena French | 1229 | — |
| LMArena German | 1204 | — |
| LMArena Japanese | 1131 | — |
| LMArena Korean | 1128 | — |
| LMArena Russian | 1227 | — |
| LMArena Spanish | 1204 | — |

## Instruction Following

- Claude 3 Sonnet: 62.8 (#235)
- Molmo 2 8b: 67.0 (#201)

| Benchmark | Claude 3 Sonnet | Molmo 2 8b |
|---|---|---|
| LMArena Instruction Following | 1199 | 1270 |

## Long Context

- Claude 3 Sonnet: 36.7 (#228)
- Molmo 2 8b: —

| Benchmark | Claude 3 Sonnet | Molmo 2 8b |
|---|---|---|
| LMArena Longer Query | 1211 | — |

## Writing & Preference

- Claude 3 Sonnet: 42.1 (#238)
- Molmo 2 8b: 49.4 (#191)

| Benchmark | Claude 3 Sonnet | Molmo 2 8b |
|---|---|---|
| LMArena Text | 1218 | 1288 |
| LMArena Creative Writing | 1186 | — |
| LMArena Multi-Turn | 1227 | — |

## FAQ

### Is Claude 3 Sonnet better than Molmo 2 8b?

Molmo 2 8b is the stronger model overall, scoring 39.1 to 29.0 on the Noometry Index.

### How many benchmarks do Claude 3 Sonnet and Molmo 2 8b share?

5 benchmarks have published results for both models. Claude 3 Sonnet has 30 scored results on Noometry and Molmo 2 8b has 5.