Model comparison
Amazon Nova Experimental Chat 10 09 vs Grok 4 Fast
Amazon Nova Experimental Chat 10 09 is the stronger model overall, scoring 41.4 to 39.0 on the Noometry Index.
Last verified . 9 shared benchmarks.
Summary
- They share 9 benchmarks with published results for both. Amazon Nova Experimental Chat 10 09 scores higher in 2 categories and Grok 4 Fast in 4 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 Fast leads 63.2 to 40.6.
Side by side
| Amazon Nova Experimental Chat 10 09 | Grok 4 Fast | |
|---|---|---|
| Provider | Amazon | xAI |
| Noometry Index | 41.4 | 39.0 |
| Released | — | 2025-09-19 |
| Weights | Proprietary | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 9 | 30 |
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Category by category
Coding Amazon Nova Experimental Chat 10 09 leads
Amazon Nova Experimental Chat 10 09: 39.6 (#142), Grok 4 Fast: 32.3 (#264)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| LMArena Coding | 1371 | 1429 |
| LMArena WebDev | — | 1160 |
| WeirdML | — | 42.9% |
Agentic & Tool Use Not comparable
Amazon Nova Experimental Chat 10 09: —, Grok 4 Fast: 29.3 (#80)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| τ²-bench Banking | — | 15.7% |
| Cybench | — | 30% |
| LMArena Search | — | 1171 |
Reasoning Amazon Nova Experimental Chat 10 09 leads
Amazon Nova Experimental Chat 10 09: 26.2 (#122), Grok 4 Fast: 22.5 (#179)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| LMArena Hard Prompts | 1356 | 1413 |
| ARC-AGI-2 | — | 5.3% |
| Kagi LLM Benchmark | — | 66.1% |
| ARC-AGI-1 | — | 48.5% |
| DTBench | — | 82.7% |
| Epoch Capabilities Index | — | 144.21 |
| ForecastBench | — | 60.5 |
Math Not comparable
Amazon Nova Experimental Chat 10 09: —, Grok 4 Fast: 36.1 (#126)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| LMArena Math | — | 1419 |
Knowledge Not comparable
Amazon Nova Experimental Chat 10 09: —, Grok 4 Fast: 31.5 (#211)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| Vectara Hallucination Rate | — | 19.7% |
| LMArena Expert | — | 1411 |
Multilingual Grok 4 Fast leads
Amazon Nova Experimental Chat 10 09: 47.5 (#145), Grok 4 Fast: 51.5 (#106)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| LMArena Non-English | 1341 | 1397 |
| LMArena Chinese | 1345 | 1458 |
| LMArena French | — | 1433 |
| LMArena German | — | 1383 |
| LMArena Japanese | — | 1358 |
| LMArena Korean | — | 1359 |
| LMArena Russian | — | 1387 |
| LMArena Spanish | — | 1414 |
Instruction Following Grok 4 Fast leads
Amazon Nova Experimental Chat 10 09: 69.7 (#167), Grok 4 Fast: 73.4 (#116)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| LMArena Instruction Following | 1316 | 1388 |
Long Context Grok 4 Fast leads
Amazon Nova Experimental Chat 10 09: 40.6 (#146), Grok 4 Fast: 63.2 (#3)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| LMArena Longer Query | 1334 | 1415 |
| Fiction.LiveBench | — | 94.4% |
Writing & Preference Grok 4 Fast leads
Amazon Nova Experimental Chat 10 09: 55.0 (#144), Grok 4 Fast: 60.2 (#96)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| LMArena Text | 1365 | 1407 |
| LMArena Creative Writing | 1307 | 1388 |
| LMArena Multi-Turn | 1354 | 1414 |
Frequently asked questions
Is Amazon Nova Experimental Chat 10 09 better than Grok 4 Fast?
Amazon Nova Experimental Chat 10 09 is the stronger model overall, scoring 41.4 to 39.0 on the Noometry Index.
Is Amazon Nova Experimental Chat 10 09 or Grok 4 Fast better for coding?
Amazon Nova Experimental Chat 10 09 scores higher on coding benchmarks: 39.6 versus 32.3 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 10 09 and Grok 4 Fast share?
9 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 09 has 9 scored results on Noometry and Grok 4 Fast has 30.