Model comparison
Grok 3 vs Molmo 2 8b
Grok 3 and Molmo 2 8b score almost the same on the Noometry Index (39.9 vs 39.1), so choose on price, context window or the category you care about most.
Last verified . 4 shared benchmarks.
Allen Institute for AI (Ai2)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 25.6 to 13.7.
- Molmo 2 8b has downloadable open weights; the other is API-only.
Side by side
| Grok 3 | Molmo 2 8b | |
|---|---|---|
| Provider | xAI | Allen Institute for AI (Ai2) |
| Noometry Index | 39.9 | 39.1 |
| Released | 2025-04-09 | — |
| Weights | Proprietary | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 40 | 5 |
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Category by category
Coding Not comparable
Grok 3: 41.9 (#115), Molmo 2 8b: —
| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| Aider Polyglot | 53.3% | — |
| WeirdML | 37.2% | — |
| LMArena Coding | 1432 | — |
Agentic & Tool Use Not comparable
Grok 3: 30.5 (#76), Molmo 2 8b: —
| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| BALROG | 29.5% | — |
Reasoning Molmo 2 8b leads
Grok 3: 13.7 (#333), Molmo 2 8b: 25.6 (#146)
| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| LMArena Hard Prompts | 1434 | 1287 |
| ARC-AGI-2 | 0% | — |
| SimpleBench | 36.1% | — |
| Kagi LLM Benchmark | 61.3% | — |
| ARC-AGI-1 | 5.5% | — |
| Epoch Capabilities Index | 138.33 | — |
Math Not comparable
Grok 3: 38.0 (#145), Molmo 2 8b: —
| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 55.6% | — |
| Omni-MATH | 46.4% | — |
| LMArena Math | 1391 | — |
| MATH Level 5 | 88.7% | — |
| FrontierMath (Feb 2025 set) | 3.8% | — |
| FrontierMath Tier 4 (v1) | 0% | — |
Knowledge Not comparable
Grok 3: 46.2 (#82), 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 | 1421 | — |
Multimodal Not comparable
Grok 3: —, Molmo 2 8b: 30.2 (#112)
| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| LMArena Vision | — | 1081 |
Multilingual Grok 3 leads
Grok 3: 52.3 (#87), Molmo 2 8b: 42.7 (#190)
| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| LMArena Non-English | 1410 | 1276 |
| LMArena Chinese | 1448 | — |
| LMArena French | 1460 | — |
| LMArena German | 1431 | — |
| LMArena Japanese | 1387 | — |
| LMArena Korean | 1373 | — |
| LMArena Russian | 1416 | — |
| LMArena Spanish | 1417 | — |
Instruction Following Grok 3 leads
Grok 3: 75.0 (#73), Molmo 2 8b: 67.0 (#201)
| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| LMArena Instruction Following | 1409 | 1270 |
| IFEval | 88.4% | — |
Long Context Not comparable
Grok 3: 38.7 (#192), Molmo 2 8b: —
| Benchmark | Grok 3 | Molmo 2 8b |
|---|---|---|
| Fiction.LiveBench | 58.3% | — |
| LMArena Longer Query | 1439 | — |
Writing & Preference Grok 3 leads
Grok 3: 55.8 (#141), Molmo 2 8b: 49.4 (#191)
| 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 | 1425 | — |
Frequently asked questions
Is Grok 3 better than Molmo 2 8b?
Grok 3 and Molmo 2 8b score almost the same on the Noometry Index (39.9 vs 39.1), 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.