# Gemma 2 9B vs GPT-5.5 Instant

> GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 25.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemma-2-9b-vs-gpt-5-5-instant
- Last updated: 2026-10-12
- Shared benchmarks: 20

## Summary

- They share 20 benchmarks with published results for both. Gemma 2 9B scores higher in 0 categories and GPT-5.5 Instant in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5.5 Instant leads 48.9 to 9.7.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 0.6% for Gemma 2 9B and 68.1% for GPT-5.5 Instant.
- Gemma 2 9B has downloadable open weights; the other is API-only.

## Snapshot

| | Gemma 2 9B | GPT-5.5 Instant |
|---|---|---|
| Provider | Google | OpenAI |
| Noometry Index | 25.9 | 42.7 |
| Rank | 341 | 110 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Open | Proprietary |

## Coding

- Gemma 2 9B: 29.4 (#304)
- GPT-5.5 Instant: 44.3 (#74)

| Benchmark | Gemma 2 9B | GPT-5.5 Instant |
|---|---|---|
| LMArena Coding | 1173 | 1433 |
| SciCode | — | 48.6% |
| BigCodeBench Instruct | 34.7% | — |
| LiveBench Coding | 22.5% | — |
| BigCodeBench Complete | 40.6% | — |

## Reasoning

- Gemma 2 9B: 15.9 (#309)
- GPT-5.5 Instant: 24.9 (#155)

| Benchmark | Gemma 2 9B | GPT-5.5 Instant |
|---|---|---|
| LMArena Hard Prompts | 1171 | 1426 |
| Epoch Capabilities Index | 119.83 | 142.52 |
| CritPt | — | 0% |
| Chess Puzzles | — | 12% |
| LiveBench Reasoning | 15.2% | — |
| LiveBench Data Analysis | 36.4% | — |
| LiveBench | 28.7% | — |
| PIQA | 83.7% | — |

## Math

- Gemma 2 9B: 9.9 (#318)
- GPT-5.5 Instant: 26.5 (#259)

| Benchmark | Gemma 2 9B | GPT-5.5 Instant |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 0.6% | 68.1% |
| LMArena Math | 1183 | 1420 |
| FrontierMath (Tiers 1-3) | — | 26.3% |
| FrontierMath Tier 4 | — | 2.4% |
| LiveBench Math | 19.8% | — |
| MATH Level 5 | 21% | — |
| GSM8K | 84.9% | — |

## Knowledge

- Gemma 2 9B: 9.7 (#305)
- GPT-5.5 Instant: 48.9 (#74)

| Benchmark | Gemma 2 9B | GPT-5.5 Instant |
|---|---|---|
| GPQA Diamond | 27.5% | 82.5% |
| LMArena Expert | 1147 | 1409 |
| BoolQ | 85.7% | — |
| MMLU | 72.1% | — |

## Multimodal

- Gemma 2 9B: —
- GPT-5.5 Instant: 40.0 (#52)

| Benchmark | Gemma 2 9B | GPT-5.5 Instant |
|---|---|---|
| LMArena Vision | — | 1250 |
| LMArena Document | — | 1403 |

## Multilingual

- Gemma 2 9B: 36.6 (#238)
- GPT-5.5 Instant: 52.8 (#80)

| Benchmark | Gemma 2 9B | GPT-5.5 Instant |
|---|---|---|
| LMArena Non-English | 1188 | 1417 |
| LMArena Chinese | 1185 | 1456 |
| LMArena French | 1190 | 1428 |
| LMArena German | 1186 | 1411 |
| LMArena Japanese | 1144 | 1408 |
| LMArena Korean | 1137 | 1392 |
| LMArena Russian | 1200 | 1431 |
| LMArena Spanish | 1200 | 1429 |

## Instruction Following

- Gemma 2 9B: 57.6 (#269)
- GPT-5.5 Instant: 74.2 (#100)

| Benchmark | Gemma 2 9B | GPT-5.5 Instant |
|---|---|---|
| LMArena Instruction Following | 1178 | 1406 |
| LiveBench Instruction Following | 52.6% | — |

## Long Context

- Gemma 2 9B: 36.3 (#233)
- GPT-5.5 Instant: 43.4 (#96)

| Benchmark | Gemma 2 9B | GPT-5.5 Instant |
|---|---|---|
| LMArena Longer Query | 1197 | 1422 |

## Writing & Preference

- Gemma 2 9B: 32.1 (#281)
- GPT-5.5 Instant: 61.8 (#85)

| Benchmark | Gemma 2 9B | GPT-5.5 Instant |
|---|---|---|
| LMArena Text | 1207 | 1419 |
| LMArena Creative Writing | 1206 | 1419 |
| LMArena Multi-Turn | 1193 | 1433 |
| EQ-Bench Creative Writing | 841 | — |
| LiveBench Language | 25.5% | — |

## FAQ

### Is Gemma 2 9B better than GPT-5.5 Instant?

GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 25.9 on the Noometry Index.

### Is Gemma 2 9B or GPT-5.5 Instant better for coding?

GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 29.4 in the Noometry coding category.

### How many benchmarks do Gemma 2 9B and GPT-5.5 Instant share?

20 benchmarks have published results for both models. Gemma 2 9B has 35 scored results on Noometry and GPT-5.5 Instant has 27.