Model comparison
Molmo 2 8b vs Step 3
Step 3 is the stronger model overall, scoring 40.5 to 39.1 on the Noometry Index.
Last verified . 5 shared benchmarks.
Allen Institute for AI (Ai2)
StepFunSummary
- They share 5 benchmarks with published results for both. Molmo 2 8b scores higher in 0 categories and Step 3 in 5 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in multimodal, where Step 3 leads 35.5 to 30.2.
Side by side
| Molmo 2 8b | Step 3 | |
|---|---|---|
| Provider | Allen Institute for AI (Ai2) | StepFun |
| Noometry Index | 39.1 | 40.5 |
| Released | — | — |
| Weights | Open | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 5 | 17 |
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Category by category
Coding Not comparable
Molmo 2 8b: —, Step 3: 40.1 (#147)
| Benchmark | Molmo 2 8b | Step 3 |
|---|---|---|
| LMArena Coding | — | 1367 |
Reasoning Step 3 leads
Molmo 2 8b: 25.6 (#146), Step 3: 28.4 (#105)
| Benchmark | Molmo 2 8b | Step 3 |
|---|---|---|
| LMArena Hard Prompts | 1287 | 1355 |
| Kagi LLM Benchmark | — | 62.3% |
Math Not comparable
Molmo 2 8b: —, Step 3: 37.6 (#148)
| Benchmark | Molmo 2 8b | Step 3 |
|---|---|---|
| LMArena Math | — | 1366 |
Knowledge Not comparable
Molmo 2 8b: —, Step 3: 36.8 (#164)
| Benchmark | Molmo 2 8b | Step 3 |
|---|---|---|
| LMArena Expert | — | 1333 |
Multimodal Step 3 leads
Molmo 2 8b: 30.2 (#112), Step 3: 35.5 (#86)
| Benchmark | Molmo 2 8b | Step 3 |
|---|---|---|
| LMArena Vision | 1081 | 1177 |
Multilingual Step 3 leads
Molmo 2 8b: 42.7 (#190), Step 3: 46.3 (#159)
| Benchmark | Molmo 2 8b | Step 3 |
|---|---|---|
| LMArena Non-English | 1276 | 1327 |
| LMArena Chinese | — | 1397 |
| LMArena German | — | 1371 |
| LMArena Korean | — | 1269 |
| LMArena Russian | — | 1331 |
| LMArena Spanish | — | 1371 |
Instruction Following Step 3 leads
Molmo 2 8b: 67.0 (#201), Step 3: 70.4 (#164)
| Benchmark | Molmo 2 8b | Step 3 |
|---|---|---|
| LMArena Instruction Following | 1270 | 1332 |
Long Context Not comparable
Molmo 2 8b: —, Step 3: 40.3 (#157)
| Benchmark | Molmo 2 8b | Step 3 |
|---|---|---|
| LMArena Longer Query | — | 1326 |
Writing & Preference Step 3 leads
Molmo 2 8b: 49.4 (#191), Step 3: 54.3 (#151)
| Benchmark | Molmo 2 8b | Step 3 |
|---|---|---|
| LMArena Text | 1288 | 1350 |
| LMArena Creative Writing | — | 1321 |
| LMArena Multi-Turn | — | 1341 |
Frequently asked questions
Is Molmo 2 8b better than Step 3?
Step 3 is the stronger model overall, scoring 40.5 to 39.1 on the Noometry Index.
How many benchmarks do Molmo 2 8b and Step 3 share?
5 benchmarks have published results for both models. Molmo 2 8b has 5 scored results on Noometry and Step 3 has 17.