Model comparison
Amazon Nova Experimental Chat 10 20 vs Grok 4.1 Fast
Amazon Nova Experimental Chat 10 20 and Grok 4.1 Fast score almost the same on the Noometry Index (41.5 vs 40.9), so choose on price, context window or the category you care about most.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. Amazon Nova Experimental Chat 10 20 scores higher in 3 categories and Grok 4.1 Fast in 5 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.1 Fast leads 42.3 to 27.3.
Side by side
| Amazon Nova Experimental Chat 10 20 | Grok 4.1 Fast | |
|---|---|---|
| Provider | Amazon | xAI |
| Noometry Index | 41.5 | 40.9 |
| Released | — | 2025-06-27 |
| Weights | Proprietary | Proprietary |
| Context window | — | 128K |
| Max output | — | 30K |
| Input $ / M tokens | — | $0.20 |
| Output $ / M tokens | — | $0.50 |
| Results tracked | 17 | 32 |
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Category by category
Coding Amazon Nova Experimental Chat 10 20 leads
Amazon Nova Experimental Chat 10 20: 41.0 (#123), Grok 4.1 Fast: 33.8 (#236)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.1 Fast |
|---|---|---|
| LMArena Coding | 1413 | 1411 |
| LMArena WebDev | — | 1241 |
| ALE-Bench | — | 394.93 |
Agentic & Tool Use Not comparable
Amazon Nova Experimental Chat 10 20: —, Grok 4.1 Fast: 36.1 (#35)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.1 Fast |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 69.6% |
| τ²-bench Banking | — | 13.1% |
| LMArena Search | — | 1171 |
| Vending-Bench 2 | — | 1,107 |
Reasoning Grok 4.1 Fast leads
Amazon Nova Experimental Chat 10 20: 27.3 (#110), Grok 4.1 Fast: 42.3 (#45)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.1 Fast |
|---|---|---|
| LMArena Hard Prompts | 1396 | 1407 |
| SimpleBench | — | 56% |
| NYT Connections (extended) | — | 87.4% |
| DTBench | — | 87.7% |
| ForecastBench | — | 61 |
Math Amazon Nova Experimental Chat 10 20 leads
Amazon Nova Experimental Chat 10 20: 36.2 (#121), Grok 4.1 Fast: 30.9 (#201)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.1 Fast |
|---|---|---|
| LMArena Math | 1425 | 1408 |
| MathArena Final-Answer Competitions | — | 60.9% |
| ProofBench | — | 4% |
Knowledge Amazon Nova Experimental Chat 10 20 leads
Amazon Nova Experimental Chat 10 20: 37.8 (#142), Grok 4.1 Fast: 32.6 (#203)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.1 Fast |
|---|---|---|
| LMArena Expert | 1385 | 1398 |
| Vectara Hallucination Rate | — | 17.8% |
Multimodal Not comparable
Amazon Nova Experimental Chat 10 20: —, Grok 4.1 Fast: 36.3 (#71)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.1 Fast |
|---|---|---|
| LMArena Vision | — | 1201 |
Multilingual Grok 4.1 Fast leads
Amazon Nova Experimental Chat 10 20: 49.7 (#127), Grok 4.1 Fast: 51.1 (#110)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.1 Fast |
|---|---|---|
| LMArena Non-English | 1372 | 1391 |
| LMArena Chinese | 1405 | 1441 |
| LMArena French | 1426 | 1416 |
| LMArena German | 1391 | 1404 |
| LMArena Japanese | 1355 | 1347 |
| LMArena Korean | 1327 | 1361 |
| LMArena Russian | 1371 | 1387 |
| LMArena Spanish | 1381 | 1411 |
Instruction Following Too close to call
Amazon Nova Experimental Chat 10 20: 72.3 (#136), Grok 4.1 Fast: 72.8 (#127)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.1 Fast |
|---|---|---|
| LMArena Instruction Following | 1365 | 1376 |
Long Context Too close to call
Amazon Nova Experimental Chat 10 20: 41.7 (#128), Grok 4.1 Fast: 42.4 (#121)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.1 Fast |
|---|---|---|
| LMArena Longer Query | 1370 | 1390 |
Writing & Preference Too close to call
Amazon Nova Experimental Chat 10 20: 56.9 (#131), Grok 4.1 Fast: 57.4 (#126)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.1 Fast |
|---|---|---|
| LMArena Text | 1394 | 1408 |
| LMArena Creative Writing | 1318 | 1394 |
| LMArena Multi-Turn | 1364 | 1389 |
| EQ-Bench Creative Writing | — | 1327 |
Frequently asked questions
Is Amazon Nova Experimental Chat 10 20 better than Grok 4.1 Fast?
Amazon Nova Experimental Chat 10 20 and Grok 4.1 Fast score almost the same on the Noometry Index (41.5 vs 40.9), so choose on price, context window or the category you care about most.
Is Amazon Nova Experimental Chat 10 20 or Grok 4.1 Fast better for coding?
Amazon Nova Experimental Chat 10 20 scores higher on coding benchmarks: 41.0 versus 33.8 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 10 20 and Grok 4.1 Fast share?
17 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 20 has 17 scored results on Noometry and Grok 4.1 Fast has 32.