# Gemma 2 9B vs GPT-5 Nano

> GPT-5 Nano is the stronger model overall, scoring 33.4 to 25.7 on the Noometry Index.

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

## Summary

- They share 20 benchmarks with published results for both. Gemma 2 9B scores higher in 1 category and GPT-5 Nano in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5 Nano leads 35.8 to 9.7.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 0.6% for Gemma 2 9B and 81.1% for GPT-5 Nano.
- Gemma 2 9B has downloadable open weights; the other is API-only.

## Snapshot

| | Gemma 2 9B | GPT-5 Nano |
|---|---|---|
| Provider | Google | OpenAI |
| Noometry Index | 25.7 | 33.4 |
| Rank | 334 | 234 |
| Context | — | 400K |
| Input $/M | — | $0.05 |
| Output $/M | — | $0.40 |
| Weights | Open | Proprietary |

## Coding

- Gemma 2 9B: 29.0 (#299)
- GPT-5 Nano: 33.3 (#248)

| Benchmark | Gemma 2 9B | GPT-5 Nano |
|---|---|---|
| LMArena Coding | 1174 | 1351 |
| SWE-bench Verified (bash only) | — | 34.8% |
| WeirdML | — | 38.1% |
| BigCodeBench Instruct | 34.7% | — |
| LiveBench Coding | 22.5% | — |
| BigCodeBench Complete | 40.6% | — |
| ALE-Bench | — | 718.67 |

## Agentic & Tool Use

- Gemma 2 9B: —
- GPT-5 Nano: 25.6 (#99)

| Benchmark | Gemma 2 9B | GPT-5 Nano |
|---|---|---|
| Terminal-Bench | — | 21.8% |
| Berkeley Function Calling Leaderboard | — | 51.5% |

## Reasoning

- Gemma 2 9B: 15.3 (#306)
- GPT-5 Nano: 16.4 (#291)

| Benchmark | Gemma 2 9B | GPT-5 Nano |
|---|---|---|
| LMArena Hard Prompts | 1172 | 1329 |
| Epoch Capabilities Index | 119.78 | 139.39 |
| ARC-AGI-2 | — | 2.6% |
| Kagi LLM Benchmark | — | 62.2% |
| ARC-AGI-1 | — | 20.7% |
| Chess Puzzles | — | 27% |
| LiveBench Reasoning | 15.2% | — |
| Mystery Game Puzzles | — | 9% |
| DTBench | — | 62.7% |
| LiveBench Data Analysis | 36.4% | — |
| LMCA | — | 7.9% |
| ForecastBench | — | 59.1 |
| LiveBench | 28.7% | — |
| PIQA | 83.7% | — |

## Math

- Gemma 2 9B: 9.3 (#312)
- GPT-5 Nano: 29.1 (#221)

| Benchmark | Gemma 2 9B | GPT-5 Nano |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 0.6% | 81.1% |
| LMArena Math | 1183 | 1318 |
| MATH Level 5 | 21% | 95.2% |
| FrontierMath (Tiers 1-3) | — | 20% |
| FrontierMath Tier 4 | — | 2.4% |
| ProofBench | — | 12% |
| Omni-MATH | — | 54.6% |
| LiveBench Math | 19.8% | — |
| FrontierMath (Feb 2025 set) | — | 8.3% |
| FrontierMath Tier 4 (v1) | — | 2.1% |
| GSM8K | 84.9% | — |

## Knowledge

- Gemma 2 9B: 9.7 (#300)
- GPT-5 Nano: 35.8 (#166)

| Benchmark | Gemma 2 9B | GPT-5 Nano |
|---|---|---|
| GPQA Diamond | 27.5% | 69.4% |
| LMArena Expert | 1147 | 1321 |
| SimpleQA Verified | — | 11.7% |
| MMLU-Pro | — | 77.8% |
| Vectara Hallucination Rate | — | 10.5% |
| GPQA (HELM) | — | 67.9% |
| BoolQ | 85.7% | — |
| MMLU | 72.1% | — |

## Multimodal

- Gemma 2 9B: —
- GPT-5 Nano: 30.7 (#102)

| Benchmark | Gemma 2 9B | GPT-5 Nano |
|---|---|---|
| LMArena Vision | — | 1159 |
| VPCT | — | 37.2% |

## Multilingual

- Gemma 2 9B: 36.8 (#233)
- GPT-5 Nano: 45.5 (#167)

| Benchmark | Gemma 2 9B | GPT-5 Nano |
|---|---|---|
| LMArena Non-English | 1188 | 1313 |
| LMArena Chinese | 1185 | 1355 |
| LMArena German | 1186 | 1329 |
| LMArena Korean | 1137 | 1269 |
| LMArena Russian | 1200 | 1296 |
| LMArena Spanish | 1200 | 1360 |
| LMArena French | 1189 | — |
| LMArena Japanese | 1144 | — |

## Instruction Following

- Gemma 2 9B: 57.8 (#264)
- GPT-5 Nano: 75.2 (#72)

| Benchmark | Gemma 2 9B | GPT-5 Nano |
|---|---|---|
| LMArena Instruction Following | 1178 | 1306 |
| LiveBench Instruction Following | 52.6% | — |
| IFEval | — | 93.2% |

## Long Context

- Gemma 2 9B: 36.3 (#228)
- GPT-5 Nano: 31.3 (#275)

| Benchmark | Gemma 2 9B | GPT-5 Nano |
|---|---|---|
| LMArena Longer Query | 1197 | 1313 |
| Fiction.LiveBench | — | 44.4% |

## Writing & Preference

- Gemma 2 9B: 32.3 (#276)
- GPT-5 Nano: 39.4 (#244)

| Benchmark | Gemma 2 9B | GPT-5 Nano |
|---|---|---|
| LMArena Text | 1207 | 1320 |
| LMArena Creative Writing | 1206 | 1250 |
| EQ-Bench Creative Writing | 841 | 705 |
| LMArena Multi-Turn | 1193 | 1311 |
| WildBench | — | 80.6% |
| LiveBench Language | 25.5% | — |

## FAQ

### Is Gemma 2 9B better than GPT-5 Nano?

GPT-5 Nano is the stronger model overall, scoring 33.4 to 25.7 on the Noometry Index.

### Is Gemma 2 9B or GPT-5 Nano better for coding?

GPT-5 Nano scores higher on coding benchmarks: 33.3 versus 29.0 in the Noometry coding category.

### How many benchmarks do Gemma 2 9B and GPT-5 Nano share?

20 benchmarks have published results for both models. Gemma 2 9B has 35 scored results on Noometry and GPT-5 Nano has 48.