# Granite 4.2 3b vs Mercury 2

> Granite 4.2 3b and Mercury 2 score almost the same on the Noometry Index (39.4 vs 39.1), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/granite-4-2-3b-vs-mercury-2
- Last updated: 2026-10-12
- Shared benchmarks: 11

## Summary

- They share 11 benchmarks with published results for both. Granite 4.2 3b scores higher in 3 categories and Mercury 2 in 4 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Mercury 2 leads 53.8 to 47.2.
- Granite 4.2 3b has downloadable open weights; the other is API-only.

## Snapshot

| | Granite 4.2 3b | Mercury 2 |
|---|---|---|
| Provider | IBM | Inception |
| Noometry Index | 39.4 | 39.1 |
| Rank | 169 | 175 |
| Context | — | 128K |
| Input $/M | — | $0.25 |
| Output $/M | — | $0.75 |
| Weights | Open | Proprietary |

## Coding

- Granite 4.2 3b: 40.0 (#151)
- Mercury 2: 33.5 (#255)

| Benchmark | Granite 4.2 3b | Mercury 2 |
|---|---|---|
| LMArena Coding | 1361 | 1391 |
| LMArena WebDev | — | 1171 |
| SciCode | — | 38.7% |
| WeirdML | — | 43.2% |
| ALE-Bench | — | 785.58 |

## Reasoning

- Granite 4.2 3b: 26.0 (#138)
- Mercury 2: 23.8 (#170)

| Benchmark | Granite 4.2 3b | Mercury 2 |
|---|---|---|
| LMArena Hard Prompts | 1306 | 1362 |
| CritPt | — | 0.8% |

## Knowledge

- Granite 4.2 3b: 36.3 (#171)
- Mercury 2: 36.2 (#172)

| Benchmark | Granite 4.2 3b | Mercury 2 |
|---|---|---|
| LMArena Expert | 1315 | 1358 |
| Vectara Hallucination Rate | — | 12.3% |

## Multilingual

- Granite 4.2 3b: 42.1 (#198)
- Mercury 2: 46.6 (#157)

| Benchmark | Granite 4.2 3b | Mercury 2 |
|---|---|---|
| LMArena Non-English | 1268 | 1331 |
| LMArena Chinese | 1269 | 1417 |
| LMArena Russian | 1249 | 1304 |

## Instruction Following

- Granite 4.2 3b: 67.1 (#200)
- Mercury 2: 70.2 (#165)

| Benchmark | Granite 4.2 3b | Mercury 2 |
|---|---|---|
| LMArena Instruction Following | 1273 | 1329 |

## Long Context

- Granite 4.2 3b: 39.2 (#185)
- Mercury 2: 40.5 (#154)

| Benchmark | Granite 4.2 3b | Mercury 2 |
|---|---|---|
| LMArena Longer Query | 1291 | 1330 |

## Writing & Preference

- Granite 4.2 3b: 47.2 (#212)
- Mercury 2: 53.8 (#155)

| Benchmark | Granite 4.2 3b | Mercury 2 |
|---|---|---|
| LMArena Text | 1293 | 1355 |
| LMArena Creative Writing | 1205 | 1289 |
| LMArena Multi-Turn | 1290 | 1358 |

## FAQ

### Is Granite 4.2 3b better than Mercury 2?

Granite 4.2 3b and Mercury 2 score almost the same on the Noometry Index (39.4 vs 39.1), so choose on price, context window or the category you care about most.

### Is Granite 4.2 3b or Mercury 2 better for coding?

Granite 4.2 3b scores higher on coding benchmarks: 40.0 versus 33.5 in the Noometry coding category.

### How many benchmarks do Granite 4.2 3b and Mercury 2 share?

11 benchmarks have published results for both models. Granite 4.2 3b has 11 scored results on Noometry and Mercury 2 has 17.