Model comparison
Gemma 3 4B vs Grok 4 Fast
Grok 4 Fast is the stronger model overall, scoring 39.4 to 28.1 on the Noometry Index.
Last verified . 16 shared benchmarks.
GoogleSummary
- 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 38.7.
- 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.
Side by side
| Gemma 3 4B | Grok 4 Fast | |
|---|---|---|
| Provider | xAI | |
| Noometry Index | 28.1 | 39.4 |
| Released | 2025-03-12 | 2025-09-19 |
| Weights | Open | Proprietary |
| Context window | 131K | — |
| Max output | 4K | — |
| Input $ / M tokens | $0.04 | — |
| Output $ / M tokens | $0.08 | — |
| Results tracked | 22 | 30 |
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Category by category
Coding Gemma 3 4B leads
Gemma 3 4B: 35.9 (#215), Grok 4 Fast: 32.5 (#271)
| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| LMArena Coding | 1230 | 1429 |
| LMArena WebDev | — | 1159 |
| WeirdML | — | 42.9% |
Agentic & Tool Use Grok 4 Fast leads
Gemma 3 4B: 20.9 (#142), Grok 4 Fast: 29.5 (#86)
| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| Berkeley Function Calling Leaderboard | 19.6% | — |
| τ²-bench Banking | — | 15.7% |
| Cybench | — | 30% |
| LMArena Search | — | 1171 |
Reasoning Grok 4 Fast leads
Gemma 3 4B: 13.2 (#335), Grok 4 Fast: 22.2 (#201)
| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| Kagi LLM Benchmark | 25.2% | 66.1% |
| LMArena Hard Prompts | 1253 | 1412 |
| DTBench | 50.9% | 82.7% |
| Epoch Capabilities Index | 116.02 | 144.2 |
| ARC-AGI-2 | — | 5.3% |
| ARC-AGI-1 | — | 48.5% |
| Chess Puzzles | 0% | — |
| LMCA | 2.8% | — |
| ForecastBench | — | 60.5 |
Math Grok 4 Fast leads
Gemma 3 4B: 16.8 (#292), Grok 4 Fast: 38.9 (#123)
| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| LMArena Math | 1239 | 1419 |
| OTIS Mock AIME 2024-2025 | 7.5% | — |
Knowledge Grok 4 Fast leads
Gemma 3 4B: 11.8 (#299), Grok 4 Fast: 32.0 (#214)
| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| Vectara Hallucination Rate | 6.4% | 19.7% |
| LMArena Expert | 1223 | 1411 |
| GPQA Diamond | 23.2% | — |
Multilingual Grok 4 Fast leads
Gemma 3 4B: 42.5 (#194), Grok 4 Fast: 51.3 (#111)
| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| LMArena Non-English | 1273 | 1396 |
| LMArena German | 1281 | 1383 |
| LMArena Russian | 1294 | 1389 |
| LMArena Chinese | — | 1457 |
| LMArena French | — | 1431 |
| LMArena Japanese | — | 1352 |
| LMArena Korean | — | 1357 |
| LMArena Spanish | — | 1415 |
Instruction Following Grok 4 Fast leads
Gemma 3 4B: 65.2 (#225), Grok 4 Fast: 73.2 (#121)
| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| LMArena Instruction Following | 1239 | 1387 |
Long Context Grok 4 Fast leads
Gemma 3 4B: 38.7 (#194), Grok 4 Fast: 63.2 (#3)
| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| LMArena Longer Query | 1273 | 1415 |
| Fiction.LiveBench | — | 94.4% |
Writing & Preference Grok 4 Fast leads
Gemma 3 4B: 42.0 (#239), Grok 4 Fast: 60.0 (#102)
| Benchmark | Gemma 3 4B | Grok 4 Fast |
|---|---|---|
| LMArena Text | 1291 | 1407 |
| LMArena Creative Writing | 1271 | 1387 |
| LMArena Multi-Turn | 1255 | 1414 |
| EQ-Bench Creative Writing | 1068 | — |
Frequently asked questions
Is Gemma 3 4B better than Grok 4 Fast?
Grok 4 Fast is the stronger model overall, scoring 39.4 to 28.1 on the Noometry Index.
Is Gemma 3 4B or Grok 4 Fast better for coding?
Gemma 3 4B scores higher on coding benchmarks: 35.9 versus 32.5 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.