Model comparison
Grok 4 Fast vs Nova 2.0 Pro Preview
Grok 4 Fast is the stronger model overall, scoring 39.0 to 32.8 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in coding, where Nova 2.0 Pro Preview leads 40.2 to 32.3.
Side by side
| Grok 4 Fast | Nova 2.0 Pro Preview | |
|---|---|---|
| Provider | xAI | Amazon |
| Noometry Index | 39.0 | 32.8 |
| Released | 2025-09-19 | 2025-12-02 |
| Weights | Proprietary | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 30 | 3 |
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Category by category
Coding Nova 2.0 Pro Preview leads
Grok 4 Fast: 32.3 (#264), Nova 2.0 Pro Preview: 40.2 (#130)
| Benchmark | Grok 4 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena WebDev | 1160 | — |
| SciCode | — | 42.7% |
| WeirdML | 42.9% | — |
| LMArena Coding | 1429 | — |
Agentic & Tool Use Grok 4 Fast leads
Grok 4 Fast: 29.3 (#80), Nova 2.0 Pro Preview: 21.9 (#127)
| Benchmark | Grok 4 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| τ²-bench Banking | 15.7% | — |
| Cybench | 30% | — |
| GDP.pdf | — | 2% |
| LMArena Search | 1171 | — |
Reasoning Too close to call
Grok 4 Fast: 22.5 (#179), Nova 2.0 Pro Preview: 21.7 (#189)
| Benchmark | Grok 4 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| ARC-AGI-2 | 5.3% | — |
| Kagi LLM Benchmark | 66.1% | — |
| ARC-AGI-1 | 48.5% | — |
| CritPt | — | 0% |
| LMArena Hard Prompts | 1413 | — |
| DTBench | 82.7% | — |
| Epoch Capabilities Index | 144.21 | — |
| ForecastBench | 60.5 | — |
Math Not comparable
Grok 4 Fast: 36.1 (#126), Nova 2.0 Pro Preview: —
| Benchmark | Grok 4 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Math | 1419 | — |
Knowledge Not comparable
Grok 4 Fast: 31.5 (#211), Nova 2.0 Pro Preview: —
| Benchmark | Grok 4 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| Vectara Hallucination Rate | 19.7% | — |
| LMArena Expert | 1411 | — |
Multilingual Not comparable
Grok 4 Fast: 51.5 (#106), Nova 2.0 Pro Preview: —
| Benchmark | Grok 4 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Non-English | 1397 | — |
| LMArena Chinese | 1458 | — |
| LMArena French | 1433 | — |
| LMArena German | 1383 | — |
| LMArena Japanese | 1358 | — |
| LMArena Korean | 1359 | — |
| LMArena Russian | 1387 | — |
| LMArena Spanish | 1414 | — |
Instruction Following Not comparable
Grok 4 Fast: 73.4 (#116), Nova 2.0 Pro Preview: —
| Benchmark | Grok 4 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Instruction Following | 1388 | — |
Long Context Not comparable
Grok 4 Fast: 63.2 (#3), Nova 2.0 Pro Preview: —
| Benchmark | Grok 4 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| Fiction.LiveBench | 94.4% | — |
| LMArena Longer Query | 1415 | — |
Writing & Preference Not comparable
Grok 4 Fast: 60.2 (#96), Nova 2.0 Pro Preview: —
| Benchmark | Grok 4 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Text | 1407 | — |
| LMArena Creative Writing | 1388 | — |
| LMArena Multi-Turn | 1414 | — |
Frequently asked questions
Is Grok 4 Fast better than Nova 2.0 Pro Preview?
Grok 4 Fast is the stronger model overall, scoring 39.0 to 32.8 on the Noometry Index.
Is Grok 4 Fast or Nova 2.0 Pro Preview better for coding?
Nova 2.0 Pro Preview scores higher on coding benchmarks: 40.2 versus 32.3 in the Noometry coding category.
How many benchmarks do Grok 4 Fast and Nova 2.0 Pro Preview share?
0 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and Nova 2.0 Pro Preview has 3.