Model comparison
Grok 4.1 vs Molmo 2 8b
Grok 4.1 is the stronger model overall, scoring 40.8 to 38.7 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 4.1 scores higher in 4 categories and Molmo 2 8b in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok 4.1 leads 62.6 to 49.5.
- Molmo 2 8b has downloadable open weights; the other is API-only.
Side by side
| Grok 4.1 | Molmo 2 8b | |
|---|---|---|
| Provider | xAI | Allen Institute for AI (Ai2) |
| Noometry Index | 40.8 | 38.7 |
| Released | 2025-11-17 | — |
| Weights | Proprietary | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 19 | 5 |
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Category by category
Coding Not comparable
Grok 4.1: 33.4 (#246), Molmo 2 8b: —
| Benchmark | Grok 4.1 | Molmo 2 8b |
|---|---|---|
| LMArena WebDev | 1214 | — |
| LMArena Coding | 1445 | — |
Agentic & Tool Use Not comparable
Grok 4.1: 33.8 (#47), Molmo 2 8b: —
| Benchmark | Grok 4.1 | Molmo 2 8b |
|---|---|---|
| Cybench | 39% | — |
Reasoning Grok 4.1 leads
Grok 4.1: 28.3 (#91), Molmo 2 8b: 24.5 (#146)
| Benchmark | Grok 4.1 | Molmo 2 8b |
|---|---|---|
| LMArena Hard Prompts | 1436 | 1288 |
Math Not comparable
Grok 4.1: 36.2 (#124), Molmo 2 8b: —
| Benchmark | Grok 4.1 | Molmo 2 8b |
|---|---|---|
| LMArena Math | 1422 | — |
Knowledge Not comparable
Grok 4.1: 38.9 (#129), Molmo 2 8b: —
| Benchmark | Grok 4.1 | Molmo 2 8b |
|---|---|---|
| LMArena Expert | 1417 | — |
Multimodal Not comparable
Grok 4.1: —, Molmo 2 8b: 29.5 (#106)
| Benchmark | Grok 4.1 | Molmo 2 8b |
|---|---|---|
| LMArena Vision | — | 1081 |
Multilingual Grok 4.1 leads
Grok 4.1: 53.6 (#64), Molmo 2 8b: 42.8 (#186)
| Benchmark | Grok 4.1 | Molmo 2 8b |
|---|---|---|
| LMArena Non-English | 1425 | 1275 |
| LMArena Chinese | 1464 | — |
| LMArena French | 1448 | — |
| LMArena German | 1447 | — |
| LMArena Japanese | 1396 | — |
| LMArena Korean | 1407 | — |
| LMArena Russian | 1434 | — |
| LMArena Spanish | 1438 | — |
Instruction Following Grok 4.1 leads
Grok 4.1: 74.0 (#106), Molmo 2 8b: 67.2 (#196)
| Benchmark | Grok 4.1 | Molmo 2 8b |
|---|---|---|
| LMArena Instruction Following | 1400 | 1270 |
Long Context Not comparable
Grok 4.1: 43.2 (#96), Molmo 2 8b: —
| Benchmark | Grok 4.1 | Molmo 2 8b |
|---|---|---|
| LMArena Longer Query | 1416 | — |
Writing & Preference Grok 4.1 leads
Grok 4.1: 62.6 (#71), Molmo 2 8b: 49.5 (#187)
| Benchmark | Grok 4.1 | Molmo 2 8b |
|---|---|---|
| LMArena Text | 1437 | 1288 |
| LMArena Creative Writing | 1411 | — |
| LMArena Multi-Turn | 1438 | — |
Frequently asked questions
Is Grok 4.1 better than Molmo 2 8b?
Grok 4.1 is the stronger model overall, scoring 40.8 to 38.7 on the Noometry Index.
How many benchmarks do Grok 4.1 and Molmo 2 8b share?
4 benchmarks have published results for both models. Grok 4.1 has 19 scored results on Noometry and Molmo 2 8b has 5.