Model comparison
GPT-5 Pro vs Molmo 2 8b
GPT-5 Pro is the stronger model overall, scoring 46.4 to 39.1 on the Noometry Index.
Last verified . 0 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- The widest gap is in reasoning, where GPT-5 Pro leads 38.9 to 25.6.
- Molmo 2 8b has downloadable open weights; the other is API-only.
Side by side
| GPT-5 Pro | Molmo 2 8b | |
|---|---|---|
| Provider | OpenAI | Allen Institute for AI (Ai2) |
| Noometry Index | 46.4 | 39.1 |
| Released | 2025-10-06 | — |
| Weights | Proprietary | Open |
| Context window | 400K | — |
| Max output | 272K | — |
| Input $ / M tokens | $15 | — |
| Output $ / M tokens | $120 | — |
| Results tracked | 12 | 5 |
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Category by category
Coding Not comparable
GPT-5 Pro: 44.0 (#80), Molmo 2 8b: —
Reasoning GPT-5 Pro leads
GPT-5 Pro: 38.9 (#62), Molmo 2 8b: 25.6 (#146)
| Benchmark | GPT-5 Pro | Molmo 2 8b |
|---|---|---|
| ARC-AGI-2 | 18.3% | — |
| SimpleBench | 61.6% | — |
| Kagi LLM Benchmark | 76.8% | — |
| ARC-AGI-1 | 70.2% | — |
| EnigmaEval | 18.8% | — |
| LMArena Hard Prompts | — | 1287 |
| Epoch Capabilities Index | 150.28 | — |
Math Not comparable
GPT-5 Pro: 48.5 (#63), Molmo 2 8b: —
| Benchmark | GPT-5 Pro | Molmo 2 8b |
|---|---|---|
| FrontierMath (Tiers 1-3) | 55.8% | — |
| FrontierMath Tier 4 | 19.5% | — |
| FrontierMath Tier 4 (v1) | 14.6% | — |
Knowledge Not comparable
GPT-5 Pro: 56.7 (#42), Molmo 2 8b: —
| Benchmark | GPT-5 Pro | Molmo 2 8b |
|---|---|---|
| Humanity's Last Exam | 31.6% | — |
Multimodal Not comparable
GPT-5 Pro: —, Molmo 2 8b: 30.2 (#112)
| Benchmark | GPT-5 Pro | Molmo 2 8b |
|---|---|---|
| LMArena Vision | — | 1081 |
Multilingual Not comparable
GPT-5 Pro: —, Molmo 2 8b: 42.7 (#190)
| Benchmark | GPT-5 Pro | Molmo 2 8b |
|---|---|---|
| LMArena Non-English | — | 1276 |
Instruction Following Not comparable
GPT-5 Pro: —, Molmo 2 8b: 67.0 (#201)
| Benchmark | GPT-5 Pro | Molmo 2 8b |
|---|---|---|
| LMArena Instruction Following | — | 1270 |
Writing & Preference Not comparable
GPT-5 Pro: —, Molmo 2 8b: 49.4 (#191)
| Benchmark | GPT-5 Pro | Molmo 2 8b |
|---|---|---|
| LMArena Text | — | 1288 |
Frequently asked questions
Is GPT-5 Pro better than Molmo 2 8b?
GPT-5 Pro is the stronger model overall, scoring 46.4 to 39.1 on the Noometry Index.
How many benchmarks do GPT-5 Pro and Molmo 2 8b share?
0 benchmarks have published results for both models. GPT-5 Pro has 12 scored results on Noometry and Molmo 2 8b has 5.