# Mercury 2 vs Molmo 2 8b

> Mercury 2 and Molmo 2 8b score almost the same on the Noometry Index (38.8 vs 38.7), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/mercury-2-vs-molmo-2-8b
- Last updated: 2026-10-10
- Shared benchmarks: 4

## Summary

- They share 4 benchmarks with published results for both. Mercury 2 scores higher in 3 categories and Molmo 2 8b in 1 category; 4 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Mercury 2 leads 54.0 to 49.5.
- Molmo 2 8b has downloadable open weights; the other is API-only.

## Snapshot

| | Mercury 2 | Molmo 2 8b |
|---|---|---|
| Provider | Inception | Allen Institute for AI (Ai2) |
| Noometry Index | 38.8 | 38.7 |
| Rank | 167 | 170 |
| Context | 128K | — |
| Input $/M | $0.25 | — |
| Output $/M | $0.75 | — |
| Weights | Proprietary | Open |

## Coding

- Mercury 2: 33.2 (#250)
- Molmo 2 8b: —

| Benchmark | Mercury 2 | Molmo 2 8b |
|---|---|---|
| LMArena WebDev | 1170 | — |
| SciCode | 38.7% | — |
| WeirdML | 43.2% | — |
| LMArena Coding | 1391 | — |
| ALE-Bench | 785.58 | — |

## Reasoning

- Mercury 2: 23.0 (#170)
- Molmo 2 8b: 24.5 (#146)

| Benchmark | Mercury 2 | Molmo 2 8b |
|---|---|---|
| LMArena Hard Prompts | 1362 | 1288 |
| CritPt | 0.8% | — |

## Knowledge

- Mercury 2: 35.6 (#170)
- Molmo 2 8b: —

| Benchmark | Mercury 2 | Molmo 2 8b |
|---|---|---|
| Vectara Hallucination Rate | 12.3% | — |
| LMArena Expert | 1358 | — |

## Multimodal

- Mercury 2: —
- Molmo 2 8b: 29.5 (#106)

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

## Multilingual

- Mercury 2: 46.8 (#153)
- Molmo 2 8b: 42.8 (#186)

| Benchmark | Mercury 2 | Molmo 2 8b |
|---|---|---|
| LMArena Non-English | 1331 | 1275 |
| LMArena Chinese | 1416 | — |
| LMArena Russian | 1303 | — |

## Instruction Following

- Mercury 2: 70.4 (#161)
- Molmo 2 8b: 67.2 (#196)

| Benchmark | Mercury 2 | Molmo 2 8b |
|---|---|---|
| LMArena Instruction Following | 1328 | 1270 |

## Long Context

- Mercury 2: 40.4 (#149)
- Molmo 2 8b: —

| Benchmark | Mercury 2 | Molmo 2 8b |
|---|---|---|
| LMArena Longer Query | 1329 | — |

## Writing & Preference

- Mercury 2: 54.0 (#151)
- Molmo 2 8b: 49.5 (#187)

| Benchmark | Mercury 2 | Molmo 2 8b |
|---|---|---|
| LMArena Text | 1355 | 1288 |
| LMArena Creative Writing | 1289 | — |
| LMArena Multi-Turn | 1358 | — |

## FAQ

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

Mercury 2 and Molmo 2 8b score almost the same on the Noometry Index (38.8 vs 38.7), so choose on price, context window or the category you care about most.

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

4 benchmarks have published results for both models. Mercury 2 has 17 scored results on Noometry and Molmo 2 8b has 5.