# Gemma 2B vs o3-pro

> o3-pro is the stronger model overall, scoring 42.7 to 29.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemma-2b-vs-o3-pro
- Last updated: 2026-10-10
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. Gemma 2B scores higher in 0 categories and o3-pro in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in long context, where o3-pro leads 72.1 to 29.9.
- Gemma 2B has downloadable open weights; the other is API-only.

## Snapshot

| | Gemma 2B | o3-pro |
|---|---|---|
| Provider | Google | OpenAI |
| Noometry Index | 29.1 | 42.7 |
| Rank | 305 | 94 |
| Context | — | 200K |
| Input $/M | — | $20 |
| Output $/M | — | $80 |
| Weights | Open | Proprietary |

## Coding

- Gemma 2B: 28.9 (#300)
- o3-pro: 55.1 (#22)

| Benchmark | Gemma 2B | o3-pro |
|---|---|---|
| Aider Polyglot | — | 84.9% |
| WeirdML | — | 58.2% |
| LMArena Coding | 1010 | — |
| HumanEval+ | 20.7% | — |
| MBPP+ | 34.1% | — |

## Reasoning

- Gemma 2B: 17.9 (#275)
- o3-pro: 24.1 (#152)

| Benchmark | Gemma 2B | o3-pro |
|---|---|---|
| Epoch Capabilities Index | 93.57 | 147.43 |
| ARC-AGI-2 | — | 4.9% |
| Kagi LLM Benchmark | — | 72.1% |
| ARC-AGI-1 | — | 59.3% |
| LMArena Hard Prompts | 989 | — |
| DTBench | — | 86.9% |
| LMCA | — | 38.5% |
| BIG-Bench Hard | 35.2% | — |
| HellaSwag | 71.4% | — |
| PIQA | 77.3% | — |
| WinoGrande | 65.4% | — |

## Math

- Gemma 2B: 27.6 (#237)
- o3-pro: —

| Benchmark | Gemma 2B | o3-pro |
|---|---|---|
| LMArena Math | 1009 | — |
| GSM8K | 17.7% | — |

## Knowledge

- Gemma 2B: —
- o3-pro: 29.0 (#234)

| Benchmark | Gemma 2B | o3-pro |
|---|---|---|
| Confabulations | — | 14.2% |
| Vectara Hallucination Rate | — | 23.3% |
| ARC (AI2) Challenge | 42.1% | — |
| BoolQ | 69.4% | — |
| MMLU | 42.3% | — |
| TriviaQA | 53.2% | — |

## Multilingual

- Gemma 2B: 23.1 (#289)
- o3-pro: —

| Benchmark | Gemma 2B | o3-pro |
|---|---|---|
| LMArena Non-English | 958 | — |
| LMArena Chinese | 986 | — |
| LMArena Russian | 937 | — |

## Instruction Following

- Gemma 2B: 48.8 (#297)
- o3-pro: —

| Benchmark | Gemma 2B | o3-pro |
|---|---|---|
| LMArena Instruction Following | 971 | — |

## Long Context

- Gemma 2B: 29.9 (#286)
- o3-pro: 72.1 (#1)

| Benchmark | Gemma 2B | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |
| LMArena Longer Query | 981 | — |

## Writing & Preference

- Gemma 2B: 24.1 (#303)
- o3-pro: 57.1 (#128)

| Benchmark | Gemma 2B | o3-pro |
|---|---|---|
| LMArena Text | 1002 | — |
| LMArena Creative Writing | 986 | — |
| Short-Story Creative Writing | — | 84.4% |
| LMArena Multi-Turn | 945 | — |

## FAQ

### Is Gemma 2B better than o3-pro?

o3-pro is the stronger model overall, scoring 42.7 to 29.1 on the Noometry Index.

### Is Gemma 2B or o3-pro better for coding?

o3-pro scores higher on coding benchmarks: 55.1 versus 28.9 in the Noometry coding category.

### How many benchmarks do Gemma 2B and o3-pro share?

1 benchmark has published results for both models. Gemma 2B has 23 scored results on Noometry and o3-pro has 12.