Model comparison
Grok-3 mini vs Molmo 2 8b
Grok-3 mini is the stronger model overall, scoring 41.2 to 39.1 on the Noometry Index.
Last verified . 4 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- They share 4 benchmarks with published results for both. Grok-3 mini 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 13.6.
- Molmo 2 8b has downloadable open weights; the other is API-only.
Side by side
| Grok-3 mini | Molmo 2 8b | |
|---|---|---|
| Provider | xAI | Allen Institute for AI (Ai2) |
| Noometry Index | 41.2 | 39.1 |
| Released | 2025-04-09 | — |
| Weights | Proprietary | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 35 | 5 |
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Category by category
Coding Not comparable
Grok-3 mini: 40.8 (#131), Molmo 2 8b: —
| Benchmark | Grok-3 mini | Molmo 2 8b |
|---|---|---|
| Aider Polyglot | 49.3% | — |
| WeirdML | 42.6% | — |
| LMArena Coding | 1379 | — |
Reasoning Molmo 2 8b leads
Grok-3 mini: 13.6 (#334), Molmo 2 8b: 25.6 (#146)
| Benchmark | Grok-3 mini | Molmo 2 8b |
|---|---|---|
| LMArena Hard Prompts | 1375 | 1287 |
| ARC-AGI-2 | 0.4% | — |
| Kagi LLM Benchmark | 61.3% | — |
| ARC-AGI-1 | 16.5% | — |
| Epoch Capabilities Index | 140.35 | — |
Math Not comparable
Grok-3 mini: 42.1 (#85), Molmo 2 8b: —
| Benchmark | Grok-3 mini | Molmo 2 8b |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 77.8% | — |
| Omni-MATH | 31.8% | — |
| LMArena Math | 1386 | — |
| MATH Level 5 | 90.9% | — |
| FrontierMath (Feb 2025 set) | 5.9% | — |
Knowledge Not comparable
Grok-3 mini: 46.4 (#81), Molmo 2 8b: —
| Benchmark | Grok-3 mini | Molmo 2 8b |
|---|---|---|
| GPQA Diamond | 76.3% | — |
| MMLU-Pro | 79.9% | — |
| Confabulations | 10.8% | — |
| GPQA (HELM) | 67.5% | — |
| LMArena Expert | 1395 | — |
Multimodal Not comparable
Grok-3 mini: —, Molmo 2 8b: 30.2 (#112)
| Benchmark | Grok-3 mini | Molmo 2 8b |
|---|---|---|
| LMArena Vision | — | 1081 |
Multilingual Grok-3 mini leads
Grok-3 mini: 48.1 (#145), Molmo 2 8b: 42.7 (#190)
| Benchmark | Grok-3 mini | Molmo 2 8b |
|---|---|---|
| LMArena Non-English | 1352 | 1276 |
| LMArena Chinese | 1387 | — |
| LMArena French | 1357 | — |
| LMArena German | 1349 | — |
| LMArena Japanese | 1342 | — |
| LMArena Korean | 1335 | — |
| LMArena Russian | 1353 | — |
| LMArena Spanish | 1381 | — |
Instruction Following Grok-3 mini leads
Grok-3 mini: 78.5 (#9), Molmo 2 8b: 67.0 (#201)
| Benchmark | Grok-3 mini | Molmo 2 8b |
|---|---|---|
| LMArena Instruction Following | 1357 | 1270 |
| IFEval | 95.1% | — |
Long Context Not comparable
Grok-3 mini: 41.0 (#147), Molmo 2 8b: —
| Benchmark | Grok-3 mini | Molmo 2 8b |
|---|---|---|
| Fiction.LiveBench | 66.7% | — |
| LMArena Longer Query | 1372 | — |
Writing & Preference Grok-3 mini leads
Grok-3 mini: 52.5 (#169), Molmo 2 8b: 49.4 (#191)
| Benchmark | Grok-3 mini | Molmo 2 8b |
|---|---|---|
| LMArena Text | 1370 | 1288 |
| LMArena Creative Writing | 1342 | — |
| Short-Story Creative Writing | 73.5% | — |
| WildBench | 65.1% | — |
| LMArena Multi-Turn | 1355 | — |
Frequently asked questions
Is Grok-3 mini better than Molmo 2 8b?
Grok-3 mini is the stronger model overall, scoring 41.2 to 39.1 on the Noometry Index.
How many benchmarks do Grok-3 mini and Molmo 2 8b share?
4 benchmarks have published results for both models. Grok-3 mini has 35 scored results on Noometry and Molmo 2 8b has 5.