# 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.

- Canonical page: https://noometry.com/compare/gpt-5-pro-vs-molmo-2-8b
- Last updated: 2026-10-11
- Shared benchmarks: 0

## 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.

## Snapshot

| | GPT-5 Pro | Molmo 2 8b |
|---|---|---|
| Provider | OpenAI | Allen Institute for AI (Ai2) |
| Noometry Index | 46.4 | 39.1 |
| Rank | 64 | 174 |
| Context | 400K | — |
| Input $/M | $15 | — |
| Output $/M | $120 | — |
| Weights | Proprietary | Open |

## Coding

- GPT-5 Pro: 44.0 (#80)
- Molmo 2 8b: —

| Benchmark | GPT-5 Pro | Molmo 2 8b |
|---|---|---|
| WeirdML | 60.4% | — |
| AlgoTune | 1.31 | — |

## Reasoning

- 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

- 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

- GPT-5 Pro: 56.7 (#42)
- Molmo 2 8b: —

| Benchmark | GPT-5 Pro | Molmo 2 8b |
|---|---|---|
| Humanity's Last Exam | 31.6% | — |

## Multimodal

- GPT-5 Pro: —
- Molmo 2 8b: 30.2 (#112)

| Benchmark | GPT-5 Pro | Molmo 2 8b |
|---|---|---|
| LMArena Vision | — | 1081 |

## Multilingual

- GPT-5 Pro: —
- Molmo 2 8b: 42.7 (#190)

| Benchmark | GPT-5 Pro | Molmo 2 8b |
|---|---|---|
| LMArena Non-English | — | 1276 |

## Instruction Following

- GPT-5 Pro: —
- Molmo 2 8b: 67.0 (#201)

| Benchmark | GPT-5 Pro | Molmo 2 8b |
|---|---|---|
| LMArena Instruction Following | — | 1270 |

## Writing & Preference

- GPT-5 Pro: —
- Molmo 2 8b: 49.4 (#191)

| Benchmark | GPT-5 Pro | Molmo 2 8b |
|---|---|---|
| LMArena Text | — | 1288 |

## FAQ

### 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.