Model comparison
Grok 4.1 Fast vs Nova 2.0 Pro Preview
Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 33.4 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in reasoning, where Grok 4.1 Fast leads 43.4 to 22.4.
Side by side
| Grok 4.1 Fast | Nova 2.0 Pro Preview | |
|---|---|---|
| Provider | xAI | Amazon |
| Noometry Index | 41.4 | 33.4 |
| Released | 2025-06-27 | 2025-12-02 |
| Weights | Proprietary | Proprietary |
| Context window | 128K | — |
| Max output | 30K | — |
| Input $ / M tokens | $0.20 | — |
| Output $ / M tokens | $0.50 | — |
| Results tracked | 32 | 3 |
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Category by category
Coding Nova 2.0 Pro Preview leads
Grok 4.1 Fast: 34.1 (#245), Nova 2.0 Pro Preview: 40.8 (#133)
| Benchmark | Grok 4.1 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena WebDev | 1242 | — |
| SciCode | — | 42.7% |
| LMArena Coding | 1411 | — |
| ALE-Bench | 394.93 | — |
Agentic & Tool Use Grok 4.1 Fast leads
Grok 4.1 Fast: 36.3 (#39), Nova 2.0 Pro Preview: 21.9 (#136)
| Benchmark | Grok 4.1 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| Berkeley Function Calling Leaderboard | 69.6% | — |
| τ²-bench Banking | 13.1% | — |
| GDP.pdf | — | 2% |
| LMArena Search | 1171 | — |
| Vending-Bench 2 | 1,107 | — |
Reasoning Grok 4.1 Fast leads
Grok 4.1 Fast: 43.4 (#49), Nova 2.0 Pro Preview: 22.4 (#194)
| Benchmark | Grok 4.1 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| SimpleBench | 56% | — |
| NYT Connections (extended) | 87.4% | — |
| CritPt | — | 0% |
| LMArena Hard Prompts | 1407 | — |
| DTBench | 87.7% | — |
| ForecastBench | 61 | — |
Math Not comparable
Grok 4.1 Fast: 31.9 (#221), Nova 2.0 Pro Preview: —
| Benchmark | Grok 4.1 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| MathArena Final-Answer Competitions | 60.9% | — |
| ProofBench | 4% | — |
| LMArena Math | 1408 | — |
Knowledge Not comparable
Grok 4.1 Fast: 33.1 (#207), Nova 2.0 Pro Preview: —
| Benchmark | Grok 4.1 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| Vectara Hallucination Rate | 17.8% | — |
| LMArena Expert | 1399 | — |
Multimodal Not comparable
Grok 4.1 Fast: 37.0 (#76), Nova 2.0 Pro Preview: —
| Benchmark | Grok 4.1 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Vision | 1201 | — |
Multilingual Not comparable
Grok 4.1 Fast: 51.0 (#114), Nova 2.0 Pro Preview: —
| Benchmark | Grok 4.1 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Non-English | 1391 | — |
| LMArena Chinese | 1441 | — |
| LMArena French | 1415 | — |
| LMArena German | 1404 | — |
| LMArena Japanese | 1349 | — |
| LMArena Korean | 1361 | — |
| LMArena Russian | 1387 | — |
| LMArena Spanish | 1413 | — |
Instruction Following Not comparable
Grok 4.1 Fast: 72.7 (#133), Nova 2.0 Pro Preview: —
| Benchmark | Grok 4.1 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Instruction Following | 1376 | — |
Long Context Not comparable
Grok 4.1 Fast: 42.4 (#126), Nova 2.0 Pro Preview: —
| Benchmark | Grok 4.1 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Longer Query | 1390 | — |
Writing & Preference Not comparable
Grok 4.1 Fast: 57.2 (#131), Nova 2.0 Pro Preview: —
| Benchmark | Grok 4.1 Fast | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Text | 1408 | — |
| LMArena Creative Writing | 1394 | — |
| EQ-Bench Creative Writing | 1327 | — |
| LMArena Multi-Turn | 1389 | — |
Frequently asked questions
Is Grok 4.1 Fast better than Nova 2.0 Pro Preview?
Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 33.4 on the Noometry Index.
Is Grok 4.1 Fast or Nova 2.0 Pro Preview better for coding?
Nova 2.0 Pro Preview scores higher on coding benchmarks: 40.8 versus 34.1 in the Noometry coding category.
How many benchmarks do Grok 4.1 Fast and Nova 2.0 Pro Preview share?
0 benchmarks have published results for both models. Grok 4.1 Fast has 32 scored results on Noometry and Nova 2.0 Pro Preview has 3.