# Gemma 2 9B vs Gemma 4 31B IT

> Gemma 4 31B IT is the stronger model overall, scoring 43.2 to 25.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemma-2-9b-vs-gemma-4-31b-it
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Gemma 2 9B scores higher in 0 categories and Gemma 4 31B IT in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Gemma 4 31B IT leads 41.3 to 9.3.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 0.6% for Gemma 2 9B and 73.3% for Gemma 4 31B IT.

## Snapshot

| | Gemma 2 9B | Gemma 4 31B IT |
|---|---|---|
| Provider | Google | Google |
| Noometry Index | 25.7 | 43.2 |
| Rank | 334 | 85 |
| Context | — | 262K |
| Input $/M | — | $0.09 |
| Output $/M | — | $0.34 |
| Weights | Open | Open |

## Coding

- Gemma 2 9B: 29.0 (#299)
- Gemma 4 31B IT: 41.9 (#98)

| Benchmark | Gemma 2 9B | Gemma 4 31B IT |
|---|---|---|
| LMArena Coding | 1174 | 1459 |
| LMArena WebDev | — | 1364 |
| SciCode | — | 43.4% |
| WeirdML | — | 52.3% |
| BigCodeBench Instruct | 34.7% | — |
| LiveBench Coding | 22.5% | — |
| BigCodeBench Complete | 40.6% | — |
| ALE-Bench | — | 925.5 |

## Reasoning

- Gemma 2 9B: 15.3 (#306)
- Gemma 4 31B IT: 26.4 (#119)

| Benchmark | Gemma 2 9B | Gemma 4 31B IT |
|---|---|---|
| LMArena Hard Prompts | 1172 | 1448 |
| Epoch Capabilities Index | 119.78 | 142.74 |
| Kagi LLM Benchmark | — | 63.5% |
| NYT Connections (extended) | — | 70.6% |
| CritPt | — | 1.4% |
| Chess Puzzles | — | 5% |
| Thematic Generalization | — | 53% |
| LiveBench Reasoning | 15.2% | — |
| DTBench | — | 82.7% |
| LiveBench Data Analysis | 36.4% | — |
| LMCA | — | 39.3% |
| Surface Evolver Bench | — | 30.6% |
| LiveBench | 28.7% | — |
| PIQA | 83.7% | — |

## Math

- Gemma 2 9B: 9.3 (#312)
- Gemma 4 31B IT: 41.3 (#72)

| Benchmark | Gemma 2 9B | Gemma 4 31B IT |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 0.6% | 73.3% |
| LMArena Math | 1183 | 1464 |
| LiveBench Math | 19.8% | — |
| MATH Level 5 | 21% | — |
| GSM8K | 84.9% | — |

## Knowledge

- Gemma 2 9B: 9.7 (#300)
- Gemma 4 31B IT: 37.9 (#141)

| Benchmark | Gemma 2 9B | Gemma 4 31B IT |
|---|---|---|
| GPQA Diamond | 27.5% | 75.8% |
| LMArena Expert | 1147 | 1465 |
| SimpleQA Verified | — | 10.4% |
| Vectara Hallucination Rate | — | 7.4% |
| BoolQ | 85.7% | — |
| MMLU | 72.1% | — |

## Multimodal

- Gemma 2 9B: —
- Gemma 4 31B IT: 41.0 (#32)

| Benchmark | Gemma 2 9B | Gemma 4 31B IT |
|---|---|---|
| LMArena Vision | — | 1278 |
| LMArena Document | — | 1425 |

## Multilingual

- Gemma 2 9B: 36.8 (#233)
- Gemma 4 31B IT: 54.0 (#52)

| Benchmark | Gemma 2 9B | Gemma 4 31B IT |
|---|---|---|
| LMArena Non-English | 1188 | 1431 |
| LMArena Chinese | 1185 | 1478 |
| LMArena French | 1189 | 1436 |
| LMArena Russian | 1200 | 1462 |
| LMArena Spanish | 1200 | 1443 |
| LMArena German | 1186 | — |
| LMArena Japanese | 1144 | — |
| LMArena Korean | 1137 | — |

## Instruction Following

- Gemma 2 9B: 57.8 (#264)
- Gemma 4 31B IT: 75.6 (#58)

| Benchmark | Gemma 2 9B | Gemma 4 31B IT |
|---|---|---|
| LMArena Instruction Following | 1178 | 1433 |
| LiveBench Instruction Following | 52.6% | — |

## Long Context

- Gemma 2 9B: 36.3 (#228)
- Gemma 4 31B IT: 44.2 (#67)

| Benchmark | Gemma 2 9B | Gemma 4 31B IT |
|---|---|---|
| LMArena Longer Query | 1197 | 1446 |

## Writing & Preference

- Gemma 2 9B: 32.3 (#276)
- Gemma 4 31B IT: 60.7 (#92)

| Benchmark | Gemma 2 9B | Gemma 4 31B IT |
|---|---|---|
| LMArena Text | 1207 | 1443 |
| LMArena Creative Writing | 1206 | 1416 |
| EQ-Bench Creative Writing | 841 | 1368 |
| LMArena Multi-Turn | 1193 | 1452 |
| EQ-Bench 4 | — | 1120 |
| LiveBench Language | 25.5% | — |

## FAQ

### Is Gemma 2 9B better than Gemma 4 31B IT?

Gemma 4 31B IT is the stronger model overall, scoring 43.2 to 25.7 on the Noometry Index.

### Is Gemma 2 9B or Gemma 4 31B IT better for coding?

Gemma 4 31B IT scores higher on coding benchmarks: 41.9 versus 29.0 in the Noometry coding category.

### How many benchmarks do Gemma 2 9B and Gemma 4 31B IT share?

18 benchmarks have published results for both models. Gemma 2 9B has 35 scored results on Noometry and Gemma 4 31B IT has 35.