# Mercury 2.5 vs Molmo 2 8b

> Molmo 2 8b is the stronger model overall, scoring 39.1 to 33.5 on the Noometry Index.

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

## Summary

- The widest gap is in reasoning, where Molmo 2 8b leads 25.6 to 22.4.
- Molmo 2 8b has downloadable open weights; the other is API-only.

## Snapshot

| | Mercury 2.5 | Molmo 2 8b |
|---|---|---|
| Provider | Inception | Allen Institute for AI (Ai2) |
| Noometry Index | 33.5 | 39.1 |
| Rank | 242 | 174 |
| Context | 260K | — |
| Input $/M | $0.04 | — |
| Output $/M | $0.15 | — |
| Weights | Proprietary | Open |

## Coding

- Mercury 2.5: 39.5 (#156)
- Molmo 2 8b: —

| Benchmark | Mercury 2.5 | Molmo 2 8b |
|---|---|---|
| SciCode | 38.5% | — |
| ALE-Bench | 301.65 | — |

## Reasoning

- Mercury 2.5: 22.4 (#193)
- Molmo 2 8b: 25.6 (#146)

| Benchmark | Mercury 2.5 | Molmo 2 8b |
|---|---|---|
| CritPt | 0% | — |
| LMArena Hard Prompts | — | 1287 |

## Math

- Mercury 2.5: 23.3 (#272)
- Molmo 2 8b: —

| Benchmark | Mercury 2.5 | Molmo 2 8b |
|---|---|---|
| ProofBench | 3% | — |

## Multimodal

- Mercury 2.5: —
- Molmo 2 8b: 30.2 (#112)

| Benchmark | Mercury 2.5 | Molmo 2 8b |
|---|---|---|
| LMArena Vision | — | 1081 |

## Multilingual

- Mercury 2.5: —
- Molmo 2 8b: 42.7 (#190)

| Benchmark | Mercury 2.5 | Molmo 2 8b |
|---|---|---|
| LMArena Non-English | — | 1276 |

## Instruction Following

- Mercury 2.5: —
- Molmo 2 8b: 67.0 (#201)

| Benchmark | Mercury 2.5 | Molmo 2 8b |
|---|---|---|
| LMArena Instruction Following | — | 1270 |

## Writing & Preference

- Mercury 2.5: —
- Molmo 2 8b: 49.4 (#191)

| Benchmark | Mercury 2.5 | Molmo 2 8b |
|---|---|---|
| LMArena Text | — | 1288 |

## FAQ

### Is Mercury 2.5 better than Molmo 2 8b?

Molmo 2 8b is the stronger model overall, scoring 39.1 to 33.5 on the Noometry Index.

### How many benchmarks do Mercury 2.5 and Molmo 2 8b share?

0 benchmarks have published results for both models. Mercury 2.5 has 4 scored results on Noometry and Molmo 2 8b has 5.