Model comparison
GPT-4.5 vs Molmo 2 8b
Molmo 2 8b is the stronger model overall, scoring 38.7 to 36.9 on the Noometry Index.
Last verified . 5 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- They share 5 benchmarks with published results for both. GPT-4.5 scores higher in 4 categories and Molmo 2 8b in 1 category; 5 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Molmo 2 8b leads 24.5 to 14.1.
- Molmo 2 8b has downloadable open weights; the other is API-only.
Side by side
| GPT-4.5 | Molmo 2 8b | |
|---|---|---|
| Provider | OpenAI | Allen Institute for AI (Ai2) |
| Noometry Index | 36.9 | 38.7 |
| Released | 2025-02-27 | — |
| Weights | Proprietary | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 42 | 5 |
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Category by category
Coding Not comparable
GPT-4.5: 41.8 (#102), Molmo 2 8b: —
| Benchmark | GPT-4.5 | Molmo 2 8b |
|---|---|---|
| Aider Polyglot | 44.9% | — |
| WeirdML | 39.4% | — |
| LiveBench Coding | 75.2% | — |
| LMArena Coding | 1397 | — |
Agentic & Tool Use Not comparable
GPT-4.5: 27.6 (#92), Molmo 2 8b: —
| Benchmark | GPT-4.5 | Molmo 2 8b |
|---|---|---|
| Cybench | 17.5% | — |
Reasoning Molmo 2 8b leads
GPT-4.5: 14.1 (#320), Molmo 2 8b: 24.5 (#146)
| Benchmark | GPT-4.5 | Molmo 2 8b |
|---|---|---|
| LMArena Hard Prompts | 1404 | 1288 |
| ARC-AGI-2 | 0.8% | — |
| SimpleBench | 34.5% | — |
| ARC-AGI-1 | 10.3% | — |
| EnigmaEval | 3.2% | — |
| LiveBench Reasoning | 71.1% | — |
| LiveBench Data Analysis | 64.3% | — |
| Epoch Capabilities Index | 136.74 | — |
| ForecastBench | 61.7 | — |
| LiveBench | 69% | — |
Math Not comparable
GPT-4.5: 31.0 (#200), Molmo 2 8b: —
| Benchmark | GPT-4.5 | Molmo 2 8b |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 37.8% | — |
| LiveBench Math | 69.3% | — |
| LMArena Math | 1412 | — |
| MATH Level 5 | 78.6% | — |
Knowledge Not comparable
GPT-4.5: 32.4 (#205), Molmo 2 8b: —
| Benchmark | GPT-4.5 | Molmo 2 8b |
|---|---|---|
| GPQA Diamond | 68.7% | — |
| Humanity's Last Exam | 5.4% | — |
| Confabulations | 13.6% | — |
| LMArena Expert | 1394 | — |
Multimodal GPT-4.5 leads
GPT-4.5: 37.0 (#68), Molmo 2 8b: 29.5 (#106)
| Benchmark | GPT-4.5 | Molmo 2 8b |
|---|---|---|
| LMArena Vision | 1195 | 1081 |
| VPCT | 45% | — |
Multilingual GPT-4.5 leads
GPT-4.5: 52.7 (#78), Molmo 2 8b: 42.8 (#186)
| Benchmark | GPT-4.5 | Molmo 2 8b |
|---|---|---|
| LMArena Non-English | 1413 | 1275 |
| LMArena Chinese | 1421 | — |
| LMArena French | 1417 | — |
| LMArena German | 1457 | — |
| LMArena Japanese | 1416 | — |
| LMArena Korean | 1392 | — |
| LMArena Russian | 1419 | — |
Instruction Following GPT-4.5 leads
GPT-4.5: 72.8 (#129), Molmo 2 8b: 67.2 (#196)
| Benchmark | GPT-4.5 | Molmo 2 8b |
|---|---|---|
| LMArena Instruction Following | 1404 | 1270 |
| LiveBench Instruction Following | 72.3% | — |
Long Context Not comparable
GPT-4.5: 40.4 (#150), Molmo 2 8b: —
| Benchmark | GPT-4.5 | Molmo 2 8b |
|---|---|---|
| Fiction.LiveBench | 63.9% | — |
| LMArena Longer Query | 1406 | — |
Writing & Preference GPT-4.5 leads
GPT-4.5: 57.1 (#129), Molmo 2 8b: 49.5 (#187)
| Benchmark | GPT-4.5 | Molmo 2 8b |
|---|---|---|
| LMArena Text | 1417 | 1288 |
| LMArena Creative Writing | 1394 | — |
| Short-Story Creative Writing | 75.6% | — |
| EQ-Bench Creative Writing | 1258 | — |
| LMArena Multi-Turn | 1444 | — |
| LiveBench Language | 61.5% | — |
Frequently asked questions
Is GPT-4.5 better than Molmo 2 8b?
Molmo 2 8b is the stronger model overall, scoring 38.7 to 36.9 on the Noometry Index.
How many benchmarks do GPT-4.5 and Molmo 2 8b share?
5 benchmarks have published results for both models. GPT-4.5 has 42 scored results on Noometry and Molmo 2 8b has 5.