Model comparison
Gemma 2 9B vs Grok 4 Fast
Grok 4 Fast is the stronger model overall, scoring 39.4 to 25.9 on the Noometry Index.
Last verified . 18 shared benchmarks.
GoogleSummary
- They share 18 benchmarks with published results for both. Gemma 2 9B scores higher in 0 categories and Grok 4 Fast in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Grok 4 Fast leads 38.9 to 9.9.
- Gemma 2 9B has downloadable open weights; the other is API-only.
Side by side
| Gemma 2 9B | Grok 4 Fast | |
|---|---|---|
| Provider | xAI | |
| Noometry Index | 25.9 | 39.4 |
| Released | 2024-06-24 | 2025-09-19 |
| Weights | Open | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 35 | 30 |
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Category by category
Coding Grok 4 Fast leads
Gemma 2 9B: 29.4 (#304), Grok 4 Fast: 32.5 (#271)
| Benchmark | Gemma 2 9B | Grok 4 Fast |
|---|---|---|
| LMArena Coding | 1173 | 1429 |
| LMArena WebDev | — | 1159 |
| WeirdML | — | 42.9% |
| BigCodeBench Instruct | 34.7% | — |
| LiveBench Coding | 22.5% | — |
| BigCodeBench Complete | 40.6% | — |
Agentic & Tool Use Not comparable
Gemma 2 9B: —, Grok 4 Fast: 29.5 (#86)
| Benchmark | Gemma 2 9B | Grok 4 Fast |
|---|---|---|
| τ²-bench Banking | — | 15.7% |
| Cybench | — | 30% |
| LMArena Search | — | 1171 |
Reasoning Grok 4 Fast leads
Gemma 2 9B: 15.9 (#309), Grok 4 Fast: 22.2 (#201)
| Benchmark | Gemma 2 9B | Grok 4 Fast |
|---|---|---|
| LMArena Hard Prompts | 1171 | 1412 |
| Epoch Capabilities Index | 119.83 | 144.2 |
| ARC-AGI-2 | — | 5.3% |
| Kagi LLM Benchmark | — | 66.1% |
| ARC-AGI-1 | — | 48.5% |
| LiveBench Reasoning | 15.2% | — |
| DTBench | — | 82.7% |
| LiveBench Data Analysis | 36.4% | — |
| ForecastBench | — | 60.5 |
| LiveBench | 28.7% | — |
| PIQA | 83.7% | — |
Math Grok 4 Fast leads
Gemma 2 9B: 9.9 (#318), Grok 4 Fast: 38.9 (#123)
| Benchmark | Gemma 2 9B | Grok 4 Fast |
|---|---|---|
| LMArena Math | 1183 | 1419 |
| OTIS Mock AIME 2024-2025 | 0.6% | — |
| LiveBench Math | 19.8% | — |
| MATH Level 5 | 21% | — |
| GSM8K | 84.9% | — |
Knowledge Grok 4 Fast leads
Gemma 2 9B: 9.7 (#305), Grok 4 Fast: 32.0 (#214)
| Benchmark | Gemma 2 9B | Grok 4 Fast |
|---|---|---|
| LMArena Expert | 1147 | 1411 |
| GPQA Diamond | 27.5% | — |
| Vectara Hallucination Rate | — | 19.7% |
| BoolQ | 85.7% | — |
| MMLU | 72.1% | — |
Multilingual Grok 4 Fast leads
Gemma 2 9B: 36.6 (#238), Grok 4 Fast: 51.3 (#111)
| Benchmark | Gemma 2 9B | Grok 4 Fast |
|---|---|---|
| LMArena Non-English | 1188 | 1396 |
| LMArena Chinese | 1185 | 1457 |
| LMArena French | 1190 | 1431 |
| LMArena German | 1186 | 1383 |
| LMArena Japanese | 1144 | 1352 |
| LMArena Korean | 1137 | 1357 |
| LMArena Russian | 1200 | 1389 |
| LMArena Spanish | 1200 | 1415 |
Instruction Following Grok 4 Fast leads
Gemma 2 9B: 57.6 (#269), Grok 4 Fast: 73.2 (#121)
| Benchmark | Gemma 2 9B | Grok 4 Fast |
|---|---|---|
| LMArena Instruction Following | 1178 | 1387 |
| LiveBench Instruction Following | 52.6% | — |
Long Context Grok 4 Fast leads
Gemma 2 9B: 36.3 (#233), Grok 4 Fast: 63.2 (#3)
| Benchmark | Gemma 2 9B | Grok 4 Fast |
|---|---|---|
| LMArena Longer Query | 1197 | 1415 |
| Fiction.LiveBench | — | 94.4% |
Writing & Preference Grok 4 Fast leads
Gemma 2 9B: 32.1 (#281), Grok 4 Fast: 60.0 (#102)
| Benchmark | Gemma 2 9B | Grok 4 Fast |
|---|---|---|
| LMArena Text | 1207 | 1407 |
| LMArena Creative Writing | 1206 | 1387 |
| LMArena Multi-Turn | 1193 | 1414 |
| EQ-Bench Creative Writing | 841 | — |
| LiveBench Language | 25.5% | — |
Frequently asked questions
Is Gemma 2 9B better than Grok 4 Fast?
Grok 4 Fast is the stronger model overall, scoring 39.4 to 25.9 on the Noometry Index.
Is Gemma 2 9B 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 2 9B and Grok 4 Fast share?
18 benchmarks have published results for both models. Gemma 2 9B has 35 scored results on Noometry and Grok 4 Fast has 30.