Model comparison
Gemma 3 4B vs Grok 4.1 Fast
Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 28.1 on the Noometry Index. Gemma 3 4B costs 5.5× less per token, which makes it the better buy when Grok 4.1 Fast's lead doesn't matter for your workload.
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 4.1 Fast in 8 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.1 Fast leads 43.4 to 13.2.
- The biggest single-benchmark swing is Berkeley Function Calling Leaderboard: 19.6% for Gemma 3 4B and 69.6% for Grok 4.1 Fast.
- Gemma 3 4B is cheaper at $0.04 / $0.08 per million input/output tokens, against $0.20 / $0.50 for Grok 4.1 Fast.
- Gemma 3 4B accepts more context: 131K tokens versus 128K.
- Gemma 3 4B has downloadable open weights; the other is API-only.
Side by side
| Gemma 3 4B | Grok 4.1 Fast | |
|---|---|---|
| Provider | xAI | |
| Noometry Index | 28.1 | 41.4 |
| Released | 2025-03-12 | 2025-06-27 |
| Weights | Open | Proprietary |
| Context window | 131K | 128K |
| Max output | 4K | 30K |
| Input $ / M tokens | $0.04 | $0.20 |
| Output $ / M tokens | $0.08 | $0.50 |
| Results tracked | 22 | 32 |
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Category by category
Coding Gemma 3 4B leads
Gemma 3 4B: 35.9 (#215), Grok 4.1 Fast: 34.1 (#245)
| Benchmark | Gemma 3 4B | Grok 4.1 Fast |
|---|---|---|
| LMArena Coding | 1230 | 1411 |
| LMArena WebDev | — | 1242 |
| ALE-Bench | — | 394.93 |
Agentic & Tool Use Grok 4.1 Fast leads
Gemma 3 4B: 20.9 (#142), Grok 4.1 Fast: 36.3 (#39)
| Benchmark | Gemma 3 4B | Grok 4.1 Fast |
|---|---|---|
| Berkeley Function Calling Leaderboard | 19.6% | 69.6% |
| τ²-bench Banking | — | 13.1% |
| LMArena Search | — | 1171 |
| Vending-Bench 2 | — | 1,107 |
Reasoning Grok 4.1 Fast leads
Gemma 3 4B: 13.2 (#335), Grok 4.1 Fast: 43.4 (#49)
| Benchmark | Gemma 3 4B | Grok 4.1 Fast |
|---|---|---|
| LMArena Hard Prompts | 1253 | 1407 |
| DTBench | 50.9% | 87.7% |
| SimpleBench | — | 56% |
| Kagi LLM Benchmark | 25.2% | — |
| NYT Connections (extended) | — | 87.4% |
| Chess Puzzles | 0% | — |
| LMCA | 2.8% | — |
| Epoch Capabilities Index | 116.02 | — |
| ForecastBench | — | 61 |
Math Grok 4.1 Fast leads
Gemma 3 4B: 16.8 (#292), Grok 4.1 Fast: 31.9 (#221)
| Benchmark | Gemma 3 4B | Grok 4.1 Fast |
|---|---|---|
| LMArena Math | 1239 | 1408 |
| MathArena Final-Answer Competitions | — | 60.9% |
| OTIS Mock AIME 2024-2025 | 7.5% | — |
| ProofBench | — | 4% |
Knowledge Grok 4.1 Fast leads
Gemma 3 4B: 11.8 (#299), Grok 4.1 Fast: 33.1 (#207)
| Benchmark | Gemma 3 4B | Grok 4.1 Fast |
|---|---|---|
| Vectara Hallucination Rate | 6.4% | 17.8% |
| LMArena Expert | 1223 | 1399 |
| GPQA Diamond | 23.2% | — |
Multimodal Not comparable
Gemma 3 4B: —, Grok 4.1 Fast: 37.0 (#76)
| Benchmark | Gemma 3 4B | Grok 4.1 Fast |
|---|---|---|
| LMArena Vision | — | 1201 |
Multilingual Grok 4.1 Fast leads
Gemma 3 4B: 42.5 (#194), Grok 4.1 Fast: 51.0 (#114)
| Benchmark | Gemma 3 4B | Grok 4.1 Fast |
|---|---|---|
| LMArena Non-English | 1273 | 1391 |
| LMArena German | 1281 | 1404 |
| LMArena Russian | 1294 | 1387 |
| LMArena Chinese | — | 1441 |
| LMArena French | — | 1415 |
| LMArena Japanese | — | 1349 |
| LMArena Korean | — | 1361 |
| LMArena Spanish | — | 1413 |
Instruction Following Grok 4.1 Fast leads
Gemma 3 4B: 65.2 (#225), Grok 4.1 Fast: 72.7 (#133)
| Benchmark | Gemma 3 4B | Grok 4.1 Fast |
|---|---|---|
| LMArena Instruction Following | 1239 | 1376 |
Long Context Grok 4.1 Fast leads
Gemma 3 4B: 38.7 (#194), Grok 4.1 Fast: 42.4 (#126)
| Benchmark | Gemma 3 4B | Grok 4.1 Fast |
|---|---|---|
| LMArena Longer Query | 1273 | 1390 |
Writing & Preference Grok 4.1 Fast leads
Gemma 3 4B: 42.0 (#239), Grok 4.1 Fast: 57.2 (#131)
| Benchmark | Gemma 3 4B | Grok 4.1 Fast |
|---|---|---|
| LMArena Text | 1291 | 1408 |
| LMArena Creative Writing | 1271 | 1394 |
| EQ-Bench Creative Writing | 1068 | 1327 |
| LMArena Multi-Turn | 1255 | 1389 |
Frequently asked questions
Is Gemma 3 4B better than Grok 4.1 Fast?
Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 28.1 on the Noometry Index. Gemma 3 4B costs 5.5× less per token, which makes it the better buy when Grok 4.1 Fast's lead doesn't matter for your workload.
Which is cheaper, Gemma 3 4B or Grok 4.1 Fast?
Gemma 3 4B is cheaper. It lists at $0.04 per million input tokens and $0.08 per million output tokens; Grok 4.1 Fast lists at $0.20 and $0.50.
Is Gemma 3 4B or Grok 4.1 Fast better for coding?
Gemma 3 4B scores higher on coding benchmarks: 35.9 versus 34.1 in the Noometry coding category.
Which has the bigger context window?
Gemma 3 4B does, with 131K tokens against 128K.
How many benchmarks do Gemma 3 4B and Grok 4.1 Fast share?
16 benchmarks have published results for both models. Gemma 3 4B has 22 scored results on Noometry and Grok 4.1 Fast has 32.