# Gemma 3 4B vs GPT-6 Luna

> GPT-6 Luna is the stronger model overall, scoring 45.1 to 27.9 on the Noometry Index. Gemma 3 4B costs 4.0× less per token, which makes it the better buy when GPT-6 Luna's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gemma-3-4b-vs-gpt-6-luna
- Last updated: 2026-10-10
- Shared benchmarks: 11

## Summary

- They share 11 benchmarks with published results for both. Gemma 3 4B scores higher in 0 categories and GPT-6 Luna in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-6 Luna leads 40.1 to 11.8.
- Gemma 3 4B is cheaper at $0.04 / $0.08 per million input/output tokens, against $0.10 / $0.50 for GPT-6 Luna.
- GPT-6 Luna accepts more context: 1.05M tokens versus 131K.
- Gemma 3 4B has downloadable open weights; the other is API-only.

## Snapshot

| | Gemma 3 4B | GPT-6 Luna |
|---|---|---|
| Provider | Google | OpenAI |
| Noometry Index | 27.9 | 45.1 |
| Rank | 320 | 65 |
| Context | 131K | 1.05M |
| Input $/M | $0.04 | $0.10 |
| Output $/M | $0.08 | $0.50 |
| Weights | Open | Proprietary |

## Coding

- Gemma 3 4B: 35.3 (#214)
- GPT-6 Luna: 54.7 (#24)

| Benchmark | Gemma 3 4B | GPT-6 Luna |
|---|---|---|
| LMArena Coding | 1230 | 1448 |
| DeepSWE | — | 66.6% |
| FrontierCode | — | 42.4% |
| LMArena WebDev | — | 1583 |

## Agentic & Tool Use

- Gemma 3 4B: 20.7 (#134)
- GPT-6 Luna: —

| Benchmark | Gemma 3 4B | GPT-6 Luna |
|---|---|---|
| Berkeley Function Calling Leaderboard | 19.6% | — |

## Reasoning

- Gemma 3 4B: 12.7 (#330)
- GPT-6 Luna: 31.7 (#68)

| Benchmark | Gemma 3 4B | GPT-6 Luna |
|---|---|---|
| LMArena Hard Prompts | 1253 | 1415 |
| Kagi LLM Benchmark | 25.2% | — |
| NYT Connections (extended) | — | 68.7% |
| Chess Puzzles | 0% | — |
| DTBench | 50.9% | — |
| LMCA | 2.8% | — |
| Epoch Capabilities Index | 116.02 | — |

## Math

- Gemma 3 4B: 15.8 (#286)
- GPT-6 Luna: 35.6 (#140)

| Benchmark | Gemma 3 4B | GPT-6 Luna |
|---|---|---|
| LMArena Math | 1239 | 1396 |
| OTIS Mock AIME 2024-2025 | 7.5% | — |

## Knowledge

- Gemma 3 4B: 11.8 (#294)
- GPT-6 Luna: 40.1 (#110)

| Benchmark | Gemma 3 4B | GPT-6 Luna |
|---|---|---|
| LMArena Expert | 1223 | 1458 |
| GPQA Diamond | 23.2% | — |
| Vectara Hallucination Rate | 6.4% | — |

## Multimodal

- Gemma 3 4B: —
- GPT-6 Luna: 42.0 (#27)

| Benchmark | Gemma 3 4B | GPT-6 Luna |
|---|---|---|
| Furniture Assembly | — | 44.2% |

## Multilingual

- Gemma 3 4B: 42.7 (#189)
- GPT-6 Luna: 51.0 (#111)

| Benchmark | Gemma 3 4B | GPT-6 Luna |
|---|---|---|
| LMArena Non-English | 1273 | 1390 |
| LMArena Russian | 1294 | 1392 |
| LMArena Chinese | — | 1425 |
| LMArena German | 1281 | — |
| LMArena Spanish | — | 1416 |

## Instruction Following

- Gemma 3 4B: 65.4 (#219)
- GPT-6 Luna: 74.7 (#85)

| Benchmark | Gemma 3 4B | GPT-6 Luna |
|---|---|---|
| LMArena Instruction Following | 1239 | 1414 |

## Long Context

- Gemma 3 4B: 38.6 (#189)
- GPT-6 Luna: 43.3 (#95)

| Benchmark | Gemma 3 4B | GPT-6 Luna |
|---|---|---|
| LMArena Longer Query | 1274 | 1417 |

## Writing & Preference

- Gemma 3 4B: 42.2 (#234)
- GPT-6 Luna: 58.4 (#115)

| Benchmark | Gemma 3 4B | GPT-6 Luna |
|---|---|---|
| LMArena Text | 1291 | 1392 |
| LMArena Creative Writing | 1270 | 1357 |
| LMArena Multi-Turn | 1255 | 1400 |
| EQ-Bench Creative Writing | 1068 | — |

## FAQ

### Is Gemma 3 4B better than GPT-6 Luna?

GPT-6 Luna is the stronger model overall, scoring 45.1 to 27.9 on the Noometry Index. Gemma 3 4B costs 4.0× less per token, which makes it the better buy when GPT-6 Luna's lead doesn't matter for your workload.

### Which is cheaper, Gemma 3 4B or GPT-6 Luna?

Gemma 3 4B is cheaper. It lists at $0.04 per million input tokens and $0.08 per million output tokens; GPT-6 Luna lists at $0.10 and $0.50.

### Is Gemma 3 4B or GPT-6 Luna better for coding?

GPT-6 Luna scores higher on coding benchmarks: 54.7 versus 35.3 in the Noometry coding category.

### Which has the bigger context window?

GPT-6 Luna does, with 1.05M tokens against 131K.

### How many benchmarks do Gemma 3 4B and GPT-6 Luna share?

11 benchmarks have published results for both models. Gemma 3 4B has 22 scored results on Noometry and GPT-6 Luna has 18.