# Gemma 4 31B IT vs Mercury 2

> Gemma 4 31B IT is the stronger model overall, scoring 43.5 to 39.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemma-4-31b-it-vs-mercury-2
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Gemma 4 31B IT scores higher in 7 categories and Mercury 2 in 0 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in coding, where Gemma 4 31B IT leads 42.3 to 33.5.
- The biggest single-benchmark swing is WeirdML: 52.3% for Gemma 4 31B IT and 43.2% for Mercury 2.
- Gemma 4 31B IT is cheaper at $0.09 / $0.34 per million input/output tokens, against $0.25 / $0.75 for Mercury 2.
- Gemma 4 31B IT accepts more context: 262K tokens versus 128K.
- Gemma 4 31B IT has downloadable open weights; the other is API-only.

## Snapshot

| | Gemma 4 31B IT | Mercury 2 |
|---|---|---|
| Provider | Google | Inception |
| Noometry Index | 43.5 | 39.1 |
| Rank | 90 | 175 |
| Context | 262K | 128K |
| Input $/M | $0.09 | $0.25 |
| Output $/M | $0.34 | $0.75 |
| Weights | Open | Proprietary |

## Coding

- Gemma 4 31B IT: 42.3 (#108)
- Mercury 2: 33.5 (#255)

| Benchmark | Gemma 4 31B IT | Mercury 2 |
|---|---|---|
| LMArena WebDev | 1366 | 1171 |
| SciCode | 43.4% | 38.7% |
| WeirdML | 52.3% | 43.2% |
| LMArena Coding | 1459 | 1391 |
| ALE-Bench | 925.5 | 785.58 |

## Reasoning

- Gemma 4 31B IT: 27.2 (#122)
- Mercury 2: 23.8 (#170)

| Benchmark | Gemma 4 31B IT | Mercury 2 |
|---|---|---|
| CritPt | 1.4% | 0.8% |
| LMArena Hard Prompts | 1448 | 1362 |
| Kagi LLM Benchmark | 63.5% | — |
| NYT Connections (extended) | 70.6% | — |
| Chess Puzzles | 5% | — |
| Thematic Generalization | 53% | — |
| DTBench | 82.7% | — |
| LMCA | 39.3% | — |
| Surface Evolver Bench | 30.6% | — |
| Epoch Capabilities Index | 142.74 | — |

## Math

- Gemma 4 31B IT: 43.2 (#81)
- Mercury 2: —

| Benchmark | Gemma 4 31B IT | Mercury 2 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 73.3% | — |
| LMArena Math | 1465 | — |

## Knowledge

- Gemma 4 31B IT: 37.9 (#151)
- Mercury 2: 36.2 (#172)

| Benchmark | Gemma 4 31B IT | Mercury 2 |
|---|---|---|
| Vectara Hallucination Rate | 7.4% | 12.3% |
| LMArena Expert | 1465 | 1358 |
| GPQA Diamond | 75.8% | — |
| SimpleQA Verified | 10.4% | — |

## Multimodal

- Gemma 4 31B IT: 41.6 (#34)
- Mercury 2: —

| Benchmark | Gemma 4 31B IT | Mercury 2 |
|---|---|---|
| LMArena Vision | 1277 | — |
| LMArena Document | 1425 | — |

## Multilingual

- Gemma 4 31B IT: 53.8 (#57)
- Mercury 2: 46.6 (#157)

| Benchmark | Gemma 4 31B IT | Mercury 2 |
|---|---|---|
| LMArena Non-English | 1431 | 1331 |
| LMArena Chinese | 1476 | 1417 |
| LMArena Russian | 1460 | 1304 |
| LMArena French | 1435 | — |
| LMArena Spanish | 1444 | — |

## Instruction Following

- Gemma 4 31B IT: 75.5 (#61)
- Mercury 2: 70.2 (#165)

| Benchmark | Gemma 4 31B IT | Mercury 2 |
|---|---|---|
| LMArena Instruction Following | 1433 | 1329 |

## Long Context

- Gemma 4 31B IT: 44.2 (#71)
- Mercury 2: 40.5 (#154)

| Benchmark | Gemma 4 31B IT | Mercury 2 |
|---|---|---|
| LMArena Longer Query | 1446 | 1330 |

## Writing & Preference

- Gemma 4 31B IT: 60.5 (#96)
- Mercury 2: 53.8 (#155)

| Benchmark | Gemma 4 31B IT | Mercury 2 |
|---|---|---|
| LMArena Text | 1443 | 1355 |
| LMArena Creative Writing | 1415 | 1289 |
| LMArena Multi-Turn | 1452 | 1358 |
| EQ-Bench Creative Writing | 1368 | — |
| EQ-Bench 4 | 1120 | — |

## FAQ

### Is Gemma 4 31B IT better than Mercury 2?

Gemma 4 31B IT is the stronger model overall, scoring 43.5 to 39.1 on the Noometry Index.

### Which is cheaper, Gemma 4 31B IT or Mercury 2?

Gemma 4 31B IT is cheaper. It lists at $0.09 per million input tokens and $0.34 per million output tokens; Mercury 2 lists at $0.25 and $0.75.

### Is Gemma 4 31B IT or Mercury 2 better for coding?

Gemma 4 31B IT scores higher on coding benchmarks: 42.3 versus 33.5 in the Noometry coding category.

### Which has the bigger context window?

Gemma 4 31B IT does, with 262K tokens against 128K.

### How many benchmarks do Gemma 4 31B IT and Mercury 2 share?

17 benchmarks have published results for both models. Gemma 4 31B IT has 35 scored results on Noometry and Mercury 2 has 17.