# Gemma 2 9B vs GPT-5.3 Chat

> GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 25.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemma-2-9b-vs-gpt-5-3-chat
- 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 GPT-5.3 Chat in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.3 Chat leads 63.3 to 32.3.
- Gemma 2 9B has downloadable open weights; the other is API-only.

## Snapshot

| | Gemma 2 9B | GPT-5.3 Chat |
|---|---|---|
| Provider | Google | OpenAI |
| Noometry Index | 25.7 | 42.1 |
| Rank | 334 | 109 |
| Context | — | 128K |
| Input $/M | — | $1.75 |
| Output $/M | — | $14 |
| Weights | Open | Proprietary |

## Coding

- Gemma 2 9B: 29.0 (#299)
- GPT-5.3 Chat: 40.8 (#124)

| Benchmark | Gemma 2 9B | GPT-5.3 Chat |
|---|---|---|
| LMArena Coding | 1174 | 1408 |
| BigCodeBench Instruct | 34.7% | — |
| LiveBench Coding | 22.5% | — |
| BigCodeBench Complete | 40.6% | — |

## Reasoning

- Gemma 2 9B: 15.3 (#306)
- GPT-5.3 Chat: 27.3 (#105)

| Benchmark | Gemma 2 9B | GPT-5.3 Chat |
|---|---|---|
| LMArena Hard Prompts | 1172 | 1399 |
| LiveBench Reasoning | 15.2% | — |
| LiveBench Data Analysis | 36.4% | — |
| Epoch Capabilities Index | 119.78 | — |
| LiveBench | 28.7% | — |
| PIQA | 83.7% | — |

## Math

- Gemma 2 9B: 9.3 (#312)
- GPT-5.3 Chat: 35.4 (#146)

| Benchmark | Gemma 2 9B | GPT-5.3 Chat |
|---|---|---|
| LMArena Math | 1183 | 1389 |
| OTIS Mock AIME 2024-2025 | 0.6% | — |
| LiveBench Math | 19.8% | — |
| MATH Level 5 | 21% | — |
| GSM8K | 84.9% | — |

## Knowledge

- Gemma 2 9B: 9.7 (#300)
- GPT-5.3 Chat: 38.2 (#137)

| Benchmark | Gemma 2 9B | GPT-5.3 Chat |
|---|---|---|
| LMArena Expert | 1147 | 1397 |
| GPQA Diamond | 27.5% | — |
| BoolQ | 85.7% | — |
| MMLU | 72.1% | — |

## Multilingual

- Gemma 2 9B: 36.8 (#233)
- GPT-5.3 Chat: 50.5 (#119)

| Benchmark | Gemma 2 9B | GPT-5.3 Chat |
|---|---|---|
| LMArena Non-English | 1188 | 1383 |
| LMArena Chinese | 1185 | 1433 |
| LMArena French | 1189 | 1398 |
| LMArena German | 1186 | 1384 |
| LMArena Japanese | 1144 | 1351 |
| LMArena Korean | 1137 | 1347 |
| LMArena Russian | 1200 | 1400 |
| LMArena Spanish | 1200 | 1371 |

## Instruction Following

- Gemma 2 9B: 57.8 (#264)
- GPT-5.3 Chat: 73.0 (#124)

| Benchmark | Gemma 2 9B | GPT-5.3 Chat |
|---|---|---|
| LMArena Instruction Following | 1178 | 1378 |
| LiveBench Instruction Following | 52.6% | — |

## Long Context

- Gemma 2 9B: 36.3 (#228)
- GPT-5.3 Chat: 42.6 (#115)

| Benchmark | Gemma 2 9B | GPT-5.3 Chat |
|---|---|---|
| LMArena Longer Query | 1197 | 1396 |

## Writing & Preference

- Gemma 2 9B: 32.3 (#276)
- GPT-5.3 Chat: 63.3 (#65)

| Benchmark | Gemma 2 9B | GPT-5.3 Chat |
|---|---|---|
| LMArena Text | 1207 | 1389 |
| LMArena Creative Writing | 1206 | 1356 |
| EQ-Bench Creative Writing | 841 | 1690 |
| LMArena Multi-Turn | 1193 | 1413 |
| LiveBench Language | 25.5% | — |

## FAQ

### Is Gemma 2 9B better than GPT-5.3 Chat?

GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 25.7 on the Noometry Index.

### Is Gemma 2 9B or GPT-5.3 Chat better for coding?

GPT-5.3 Chat scores higher on coding benchmarks: 40.8 versus 29.0 in the Noometry coding category.

### How many benchmarks do Gemma 2 9B and GPT-5.3 Chat share?

18 benchmarks have published results for both models. Gemma 2 9B has 35 scored results on Noometry and GPT-5.3 Chat has 18.