# Gemini 1.5 Flash 8B vs Gemma 4 31B IT

> Gemma 4 31B IT is the stronger model overall, scoring 43.5 to 29.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-1-5-flash-8b-vs-gemma-4-31b-it
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Gemini 1.5 Flash 8B scores higher in 0 categories and Gemma 4 31B IT in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Gemma 4 31B IT leads 43.2 to 14.2.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 4.6% for Gemini 1.5 Flash 8B and 73.3% for Gemma 4 31B IT.
- Gemma 4 31B IT has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 1.5 Flash 8B | Gemma 4 31B IT |
|---|---|---|
| Provider | Google | Google |
| Noometry Index | 29.9 | 43.5 |
| Rank | 301 | 90 |
| Context | — | 262K |
| Input $/M | — | $0.09 |
| Output $/M | — | $0.34 |
| Weights | Proprietary | Open |

## Coding

- Gemini 1.5 Flash 8B: 35.5 (#225)
- Gemma 4 31B IT: 42.3 (#108)

| Benchmark | Gemini 1.5 Flash 8B | Gemma 4 31B IT |
|---|---|---|
| LMArena Coding | 1218 | 1459 |
| LMArena WebDev | — | 1366 |
| SciCode | — | 43.4% |
| WeirdML | — | 52.3% |
| ALE-Bench | — | 925.5 |

## Reasoning

- Gemini 1.5 Flash 8B: 20.0 (#244)
- Gemma 4 31B IT: 27.2 (#122)

| Benchmark | Gemini 1.5 Flash 8B | Gemma 4 31B IT |
|---|---|---|
| LMArena Hard Prompts | 1209 | 1448 |
| DTBench | 50% | 82.7% |
| Kagi LLM Benchmark | — | 63.5% |
| NYT Connections (extended) | — | 70.6% |
| CritPt | — | 1.4% |
| Chess Puzzles | — | 5% |
| Thematic Generalization | — | 53% |
| LMCA | — | 39.3% |
| Surface Evolver Bench | — | 30.6% |
| Epoch Capabilities Index | — | 142.74 |

## Math

- Gemini 1.5 Flash 8B: 14.2 (#302)
- Gemma 4 31B IT: 43.2 (#81)

| Benchmark | Gemini 1.5 Flash 8B | Gemma 4 31B IT |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 4.6% | 73.3% |
| LMArena Math | 1207 | 1465 |

## Knowledge

- Gemini 1.5 Flash 8B: 16.0 (#289)
- Gemma 4 31B IT: 37.9 (#151)

| Benchmark | Gemini 1.5 Flash 8B | Gemma 4 31B IT |
|---|---|---|
| GPQA Diamond | 33% | 75.8% |
| LMArena Expert | 1185 | 1465 |
| SimpleQA Verified | — | 10.4% |
| Vectara Hallucination Rate | — | 7.4% |

## Multimodal

- Gemini 1.5 Flash 8B: 28.2 (#115)
- Gemma 4 31B IT: 41.6 (#34)

| Benchmark | Gemini 1.5 Flash 8B | Gemma 4 31B IT |
|---|---|---|
| LMArena Vision | 1044 | 1277 |
| LMArena Document | — | 1425 |

## Multilingual

- Gemini 1.5 Flash 8B: 38.5 (#229)
- Gemma 4 31B IT: 53.8 (#57)

| Benchmark | Gemini 1.5 Flash 8B | Gemma 4 31B IT |
|---|---|---|
| LMArena Non-English | 1215 | 1431 |
| LMArena Chinese | 1231 | 1476 |
| LMArena French | 1234 | 1435 |
| LMArena Russian | 1236 | 1460 |
| LMArena Spanish | 1212 | 1444 |
| LMArena German | 1206 | — |
| LMArena Japanese | 1150 | — |
| LMArena Korean | 1140 | — |

## Instruction Following

- Gemini 1.5 Flash 8B: 62.8 (#236)
- Gemma 4 31B IT: 75.5 (#61)

| Benchmark | Gemini 1.5 Flash 8B | Gemma 4 31B IT |
|---|---|---|
| LMArena Instruction Following | 1199 | 1433 |

## Long Context

- Gemini 1.5 Flash 8B: 37.0 (#225)
- Gemma 4 31B IT: 44.2 (#71)

| Benchmark | Gemini 1.5 Flash 8B | Gemma 4 31B IT |
|---|---|---|
| LMArena Longer Query | 1219 | 1446 |

## Writing & Preference

- Gemini 1.5 Flash 8B: 42.8 (#232)
- Gemma 4 31B IT: 60.5 (#96)

| Benchmark | Gemini 1.5 Flash 8B | Gemma 4 31B IT |
|---|---|---|
| LMArena Text | 1226 | 1443 |
| LMArena Creative Writing | 1218 | 1415 |
| LMArena Multi-Turn | 1185 | 1452 |
| EQ-Bench Creative Writing | — | 1368 |
| EQ-Bench 4 | — | 1120 |

## FAQ

### Is Gemini 1.5 Flash 8B better than Gemma 4 31B IT?

Gemma 4 31B IT is the stronger model overall, scoring 43.5 to 29.9 on the Noometry Index.

### Is Gemini 1.5 Flash 8B or Gemma 4 31B IT better for coding?

Gemma 4 31B IT scores higher on coding benchmarks: 42.3 versus 35.5 in the Noometry coding category.

### How many benchmarks do Gemini 1.5 Flash 8B and Gemma 4 31B IT share?

18 benchmarks have published results for both models. Gemini 1.5 Flash 8B has 21 scored results on Noometry and Gemma 4 31B IT has 35.