# Claude Sonnet 5.5 vs Molmo 2 8b

> Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 38.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-sonnet-5-5-vs-molmo-2-8b
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in reasoning, where Claude Sonnet 5.5 leads 52.4 to 24.5.
- Molmo 2 8b has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Sonnet 5.5 | Molmo 2 8b |
|---|---|---|
| Provider | Anthropic | Allen Institute for AI (Ai2) |
| Noometry Index | 60.5 | 38.7 |
| Rank | 10 | 170 |
| Context | 1M | — |
| Input $/M | $2 | — |
| Output $/M | $10 | — |
| Weights | Proprietary | Open |

## Coding

- Claude Sonnet 5.5: 65.5 (#6)
- Molmo 2 8b: —

| Benchmark | Claude Sonnet 5.5 | Molmo 2 8b |
|---|---|---|
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1699 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| ALE-Bench | 1,819 | — |

## Agentic & Tool Use

- Claude Sonnet 5.5: 44.9 (#14)
- Molmo 2 8b: —

| Benchmark | Claude Sonnet 5.5 | Molmo 2 8b |
|---|---|---|
| APEX-Agents | 75.5% | — |

## Reasoning

- Claude Sonnet 5.5: 52.4 (#29)
- Molmo 2 8b: 24.5 (#146)

| Benchmark | Claude Sonnet 5.5 | Molmo 2 8b |
|---|---|---|
| CritPt | 31.4% | — |
| LMArena Hard Prompts | — | 1288 |
| Mystery Game Puzzles | 65% | — |

## Math

- Claude Sonnet 5.5: 88.7 (#4)
- Molmo 2 8b: —

| Benchmark | Claude Sonnet 5.5 | Molmo 2 8b |
|---|---|---|
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |

## Knowledge

- Claude Sonnet 5.5: 66.0 (#11)
- Molmo 2 8b: —

| Benchmark | Claude Sonnet 5.5 | Molmo 2 8b |
|---|---|---|
| GPQA Diamond | 95.6% | — |
| SimpleQA Verified | 46.5% | — |

## Multimodal

- Claude Sonnet 5.5: 53.2 (#5)
- Molmo 2 8b: 29.5 (#106)

| Benchmark | Claude Sonnet 5.5 | Molmo 2 8b |
|---|---|---|
| LMArena Vision | — | 1081 |
| Furniture Assembly | 75% | — |

## Multilingual

- Claude Sonnet 5.5: —
- Molmo 2 8b: 42.8 (#186)

| Benchmark | Claude Sonnet 5.5 | Molmo 2 8b |
|---|---|---|
| LMArena Non-English | — | 1275 |

## Instruction Following

- Claude Sonnet 5.5: —
- Molmo 2 8b: 67.2 (#196)

| Benchmark | Claude Sonnet 5.5 | Molmo 2 8b |
|---|---|---|
| LMArena Instruction Following | — | 1270 |

## Writing & Preference

- Claude Sonnet 5.5: —
- Molmo 2 8b: 49.5 (#187)

| Benchmark | Claude Sonnet 5.5 | Molmo 2 8b |
|---|---|---|
| LMArena Text | — | 1288 |

## FAQ

### Is Claude Sonnet 5.5 better than Molmo 2 8b?

Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 38.7 on the Noometry Index.

### How many benchmarks do Claude Sonnet 5.5 and Molmo 2 8b share?

0 benchmarks have published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and Molmo 2 8b has 5.