Model comparison
Gemma 2B vs Grok 4 Fast
Grok 4 Fast is the stronger model overall, scoring 39.4 to 29.6 on the Noometry Index.
Last verified . 12 shared benchmarks.
GoogleSummary
- They share 12 benchmarks with published results for both. Gemma 2B scores higher in 0 categories and Grok 4 Fast in 7 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok 4 Fast leads 60.0 to 24.0.
- Gemma 2B has downloadable open weights; the other is API-only.
Side by side
| Gemma 2B | Grok 4 Fast | |
|---|---|---|
| Provider | xAI | |
| Noometry Index | 29.6 | 39.4 |
| Released | 2024-02-21 | 2025-09-19 |
| Weights | Open | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 23 | 30 |
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Category by category
Coding Grok 4 Fast leads
Gemma 2B: 29.4 (#305), Grok 4 Fast: 32.5 (#271)
| Benchmark | Gemma 2B | Grok 4 Fast |
|---|---|---|
| LMArena Coding | 1010 | 1429 |
| LMArena WebDev | — | 1159 |
| WeirdML | — | 42.9% |
| HumanEval+ | 20.7% | — |
| MBPP+ | 34.1% | — |
Agentic & Tool Use Not comparable
Gemma 2B: —, Grok 4 Fast: 29.5 (#86)
| Benchmark | Gemma 2B | Grok 4 Fast |
|---|---|---|
| τ²-bench Banking | — | 15.7% |
| Cybench | — | 30% |
| LMArena Search | — | 1171 |
Reasoning Grok 4 Fast leads
Gemma 2B: 18.8 (#275), Grok 4 Fast: 22.2 (#201)
| Benchmark | Gemma 2B | Grok 4 Fast |
|---|---|---|
| LMArena Hard Prompts | 989 | 1412 |
| Epoch Capabilities Index | 94.2 | 144.2 |
| ARC-AGI-2 | — | 5.3% |
| Kagi LLM Benchmark | — | 66.1% |
| ARC-AGI-1 | — | 48.5% |
| DTBench | — | 82.7% |
| BIG-Bench Hard | 35.2% | — |
| ForecastBench | — | 60.5 |
| HellaSwag | 71.4% | — |
| PIQA | 77.3% | — |
| WinoGrande | 65.4% | — |
Math Grok 4 Fast leads
Gemma 2B: 30.0 (#239), Grok 4 Fast: 38.9 (#123)
| Benchmark | Gemma 2B | Grok 4 Fast |
|---|---|---|
| LMArena Math | 1009 | 1419 |
| GSM8K | 17.7% | — |
Knowledge Not comparable
Gemma 2B: —, Grok 4 Fast: 32.0 (#214)
| Benchmark | Gemma 2B | Grok 4 Fast |
|---|---|---|
| Vectara Hallucination Rate | — | 19.7% |
| LMArena Expert | — | 1411 |
| ARC (AI2) Challenge | 42.1% | — |
| BoolQ | 69.4% | — |
| MMLU | 42.3% | — |
| TriviaQA | 53.2% | — |
Multilingual Grok 4 Fast leads
Gemma 2B: 23.0 (#294), Grok 4 Fast: 51.3 (#111)
| Benchmark | Gemma 2B | Grok 4 Fast |
|---|---|---|
| LMArena Non-English | 958 | 1396 |
| LMArena Chinese | 986 | 1457 |
| LMArena Russian | 937 | 1389 |
| LMArena French | — | 1431 |
| LMArena German | — | 1383 |
| LMArena Japanese | — | 1352 |
| LMArena Korean | — | 1357 |
| LMArena Spanish | — | 1415 |
Instruction Following Grok 4 Fast leads
Gemma 2B: 48.5 (#302), Grok 4 Fast: 73.2 (#121)
| Benchmark | Gemma 2B | Grok 4 Fast |
|---|---|---|
| LMArena Instruction Following | 970 | 1387 |
Long Context Grok 4 Fast leads
Gemma 2B: 29.9 (#291), Grok 4 Fast: 63.2 (#3)
| Benchmark | Gemma 2B | Grok 4 Fast |
|---|---|---|
| LMArena Longer Query | 981 | 1415 |
| Fiction.LiveBench | — | 94.4% |
Writing & Preference Grok 4 Fast leads
Gemma 2B: 24.0 (#308), Grok 4 Fast: 60.0 (#102)
| Benchmark | Gemma 2B | Grok 4 Fast |
|---|---|---|
| LMArena Text | 1002 | 1407 |
| LMArena Creative Writing | 987 | 1387 |
| LMArena Multi-Turn | 945 | 1414 |
Frequently asked questions
Is Gemma 2B better than Grok 4 Fast?
Grok 4 Fast is the stronger model overall, scoring 39.4 to 29.6 on the Noometry Index.
Is Gemma 2B or Grok 4 Fast better for coding?
Grok 4 Fast scores higher on coding benchmarks: 32.5 versus 29.4 in the Noometry coding category.
How many benchmarks do Gemma 2B and Grok 4 Fast share?
12 benchmarks have published results for both models. Gemma 2B has 23 scored results on Noometry and Grok 4 Fast has 30.