# Grok 3 vs Molmo 2 8b

> Grok 3 and Molmo 2 8b score almost the same on the Noometry Index (39.6 vs 38.7), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/grok-3-vs-molmo-2-8b
- Last updated: 2026-10-10
- Shared benchmarks: 4

## Summary

- They share 4 benchmarks with published results for both. Grok 3 scores higher in 3 categories and Molmo 2 8b in 1 category; 4 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Molmo 2 8b leads 24.5 to 13.8.
- Molmo 2 8b has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 3 | Molmo 2 8b |
|---|---|---|
| Provider | xAI | Allen Institute for AI (Ai2) |
| Noometry Index | 39.6 | 38.7 |
| Rank | 150 | 170 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- Grok 3: 41.5 (#113)
- Molmo 2 8b: —

| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| Aider Polyglot | 53.3% | — |
| WeirdML | 37.2% | — |
| LMArena Coding | 1432 | — |

## Agentic & Tool Use

- Grok 3: 30.2 (#69)
- Molmo 2 8b: —

| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| BALROG | 29.5% | — |

## Reasoning

- Grok 3: 13.8 (#322)
- Molmo 2 8b: 24.5 (#146)

| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| LMArena Hard Prompts | 1433 | 1288 |
| ARC-AGI-2 | 0% | — |
| SimpleBench | 36.1% | — |
| Kagi LLM Benchmark | 61.3% | — |
| ARC-AGI-1 | 5.5% | — |
| Epoch Capabilities Index | 138.34 | — |

## Math

- Grok 3: 36.2 (#122)
- Molmo 2 8b: —

| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 55.6% | — |
| Omni-MATH | 46.4% | — |
| LMArena Math | 1390 | — |
| MATH Level 5 | 88.7% | — |
| FrontierMath (Feb 2025 set) | 3.8% | — |
| FrontierMath Tier 4 (v1) | 0% | — |

## Knowledge

- Grok 3: 46.0 (#76)
- Molmo 2 8b: —

| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| GPQA Diamond | 75.8% | — |
| MMLU-Pro | 78.8% | — |
| Confabulations | 14.2% | — |
| Vectara Hallucination Rate | 5.8% | — |
| GPQA (HELM) | 65% | — |
| LMArena Expert | 1420 | — |

## Multimodal

- Grok 3: —
- Molmo 2 8b: 29.5 (#106)

| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| LMArena Vision | — | 1081 |

## Multilingual

- Grok 3: 52.5 (#81)
- Molmo 2 8b: 42.8 (#186)

| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| LMArena Non-English | 1411 | 1275 |
| LMArena Chinese | 1448 | — |
| LMArena French | 1460 | — |
| LMArena German | 1431 | — |
| LMArena Japanese | 1389 | — |
| LMArena Korean | 1374 | — |
| LMArena Russian | 1416 | — |
| LMArena Spanish | 1417 | — |

## Instruction Following

- Grok 3: 75.2 (#69)
- Molmo 2 8b: 67.2 (#196)

| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| LMArena Instruction Following | 1409 | 1270 |
| IFEval | 88.4% | — |

## Long Context

- Grok 3: 38.7 (#187)
- Molmo 2 8b: —

| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| Fiction.LiveBench | 58.3% | — |
| LMArena Longer Query | 1439 | — |

## Writing & Preference

- Grok 3: 56.0 (#136)
- Molmo 2 8b: 49.5 (#187)

| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| LMArena Text | 1426 | 1288 |
| LMArena Creative Writing | 1414 | — |
| Short-Story Creative Writing | 76.4% | — |
| EQ-Bench Creative Writing | 1186 | — |
| WildBench | 84.9% | — |
| LMArena Multi-Turn | 1424 | — |

## FAQ

### Is Grok 3 better than Molmo 2 8b?

Grok 3 and Molmo 2 8b score almost the same on the Noometry Index (39.6 vs 38.7), so choose on price, context window or the category you care about most.

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

4 benchmarks have published results for both models. Grok 3 has 40 scored results on Noometry and Molmo 2 8b has 5.