# Gemma 3 4B vs Grok 4 Fast

> Grok 4 Fast is the stronger model overall, scoring 39.0 to 27.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemma-3-4b-vs-grok-4-fast
- Last updated: 2026-10-10
- Shared benchmarks: 16

## Summary

- They share 16 benchmarks with published results for both. Gemma 3 4B scores higher in 1 category and Grok 4 Fast in 8 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 Fast leads 63.2 to 38.6.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 25.2% for Gemma 3 4B and 66.1% for Grok 4 Fast.
- Gemma 3 4B has downloadable open weights; the other is API-only.

## Snapshot

| | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| Provider | Google | xAI |
| Noometry Index | 27.9 | 39.0 |
| Rank | 320 | 164 |
| Context | 131K | — |
| Input $/M | $0.04 | — |
| Output $/M | $0.08 | — |
| Weights | Open | Proprietary |

## Coding

- Gemma 3 4B: 35.3 (#214)
- Grok 4 Fast: 32.3 (#264)

| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| LMArena Coding | 1230 | 1429 |
| LMArena WebDev | — | 1160 |
| WeirdML | — | 42.9% |

## Agentic & Tool Use

- Gemma 3 4B: 20.7 (#134)
- Grok 4 Fast: 29.3 (#80)

| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| Berkeley Function Calling Leaderboard | 19.6% | — |
| τ²-bench Banking | — | 15.7% |
| Cybench | — | 30% |
| LMArena Search | — | 1171 |

## Reasoning

- Gemma 3 4B: 12.7 (#330)
- Grok 4 Fast: 22.5 (#179)

| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| Kagi LLM Benchmark | 25.2% | 66.1% |
| LMArena Hard Prompts | 1253 | 1413 |
| DTBench | 50.9% | 82.7% |
| Epoch Capabilities Index | 116.02 | 144.21 |
| ARC-AGI-2 | — | 5.3% |
| ARC-AGI-1 | — | 48.5% |
| Chess Puzzles | 0% | — |
| LMCA | 2.8% | — |
| ForecastBench | — | 60.5 |

## Math

- Gemma 3 4B: 15.8 (#286)
- Grok 4 Fast: 36.1 (#126)

| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| LMArena Math | 1239 | 1419 |
| OTIS Mock AIME 2024-2025 | 7.5% | — |

## Knowledge

- Gemma 3 4B: 11.8 (#294)
- Grok 4 Fast: 31.5 (#211)

| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| Vectara Hallucination Rate | 6.4% | 19.7% |
| LMArena Expert | 1223 | 1411 |
| GPQA Diamond | 23.2% | — |

## Multilingual

- Gemma 3 4B: 42.7 (#189)
- Grok 4 Fast: 51.5 (#106)

| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| LMArena Non-English | 1273 | 1397 |
| LMArena German | 1281 | 1383 |
| LMArena Russian | 1294 | 1387 |
| LMArena Chinese | — | 1458 |
| LMArena French | — | 1433 |
| LMArena Japanese | — | 1358 |
| LMArena Korean | — | 1359 |
| LMArena Spanish | — | 1414 |

## Instruction Following

- Gemma 3 4B: 65.4 (#219)
- Grok 4 Fast: 73.4 (#116)

| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| LMArena Instruction Following | 1239 | 1388 |

## Long Context

- Gemma 3 4B: 38.6 (#189)
- Grok 4 Fast: 63.2 (#3)

| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| LMArena Longer Query | 1274 | 1415 |
| Fiction.LiveBench | — | 94.4% |

## Writing & Preference

- Gemma 3 4B: 42.2 (#234)
- Grok 4 Fast: 60.2 (#96)

| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| LMArena Text | 1291 | 1407 |
| LMArena Creative Writing | 1270 | 1388 |
| LMArena Multi-Turn | 1255 | 1414 |
| EQ-Bench Creative Writing | 1068 | — |

## FAQ

### Is Gemma 3 4B better than Grok 4 Fast?

Grok 4 Fast is the stronger model overall, scoring 39.0 to 27.9 on the Noometry Index.

### Is Gemma 3 4B or Grok 4 Fast better for coding?

Gemma 3 4B scores higher on coding benchmarks: 35.3 versus 32.3 in the Noometry coding category.

### How many benchmarks do Gemma 3 4B and Grok 4 Fast share?

16 benchmarks have published results for both models. Gemma 3 4B has 22 scored results on Noometry and Grok 4 Fast has 30.