Model comparison
Amazon Nova Experimental Chat 10 09 vs Grok 4.5
Grok 4.5 is the stronger model overall, scoring 55.0 to 41.4 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 0 categories and Grok 4.5 in 6 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.5 leads 56.0 to 26.2.
Side by side
| Amazon Nova Experimental Chat 10 09 | Grok 4.5 | |
|---|---|---|
| Provider | Amazon | xAI |
| Noometry Index | 41.4 | 55.0 |
| Released | — | 2026-07-08 |
| Weights | Proprietary | Proprietary |
| Context window | — | 500K |
| Max output | — | 500K |
| Input $ / M tokens | — | $2 |
| Output $ / M tokens | — | $6 |
| Results tracked | 9 | 52 |
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Category by category
Coding Grok 4.5 leads
Amazon Nova Experimental Chat 10 09: 39.6 (#142), Grok 4.5: 51.7 (#34)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4.5 |
|---|---|---|
| LMArena Coding | 1371 | 1473 |
| DeepSWE | — | 53.8% |
| FrontierCode | — | 42.4% |
| LMArena WebDev | — | 1552 |
| SciCode | — | 54.1% |
| WeirdML | — | 46.4% |
| ALE-Bench | — | 1,309 |
Agentic & Tool Use Not comparable
Amazon Nova Experimental Chat 10 09: —, Grok 4.5: 44.4 (#15)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4.5 |
|---|---|---|
| APEX-Agents | — | 56.2% |
| τ²-bench Banking | — | 47.9% |
| PostTrainBench | — | 23.4% |
| GBAEval | — | 65.4% |
| GDP.pdf | — | 14% |
| LMArena Search | — | 1213 |
| Vending-Bench 2 | — | 3,887 |
Reasoning Grok 4.5 leads
Amazon Nova Experimental Chat 10 09: 26.2 (#122), Grok 4.5: 56.0 (#23)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4.5 |
|---|---|---|
| LMArena Hard Prompts | 1356 | 1462 |
| ARC-AGI-2 | — | 52.6% |
| SimpleBench | — | 70% |
| Kagi LLM Benchmark | — | 83.5% |
| NYT Connections (extended) | — | 79.9% |
| ARC-AGI-1 | — | 87.2% |
| CritPt | — | 15.4% |
| Chess Puzzles | — | 36% |
| DTBench | — | 96.5% |
| LMCA | — | 45.2% |
| Surface Evolver Bench | — | 74.4% |
| Epoch Capabilities Index | — | 154.02 |
Math Not comparable
Amazon Nova Experimental Chat 10 09: —, Grok 4.5: 60.7 (#29)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4.5 |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 57.2% |
| FrontierMath Tier 4 | — | 24.4% |
| OTIS Mock AIME 2024-2025 | — | 97.8% |
| ProofBench | — | 31% |
| LMArena Math | — | 1457 |
Knowledge Not comparable
Amazon Nova Experimental Chat 10 09: —, Grok 4.5: 62.3 (#21)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4.5 |
|---|---|---|
| GPQA Diamond | — | 93.4% |
| SimpleQA Verified | — | 48.3% |
| LMArena Expert | — | 1466 |
Multimodal Not comparable
Amazon Nova Experimental Chat 10 09: —, Grok 4.5: 37.8 (#63)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4.5 |
|---|---|---|
| LMArena Vision | — | 1287 |
| Blueprint-Bench 2 | — | 27.3% |
| Furniture Assembly | — | 22.5% |
| LMArena Document | — | 1452 |
Multilingual Grok 4.5 leads
Amazon Nova Experimental Chat 10 09: 47.5 (#145), Grok 4.5: 54.5 (#43)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4.5 |
|---|---|---|
| LMArena Non-English | 1341 | 1439 |
| LMArena Chinese | 1345 | 1497 |
| LMArena French | — | 1458 |
| LMArena German | — | 1448 |
| LMArena Japanese | — | 1425 |
| LMArena Korean | — | 1402 |
| LMArena Russian | — | 1447 |
| LMArena Spanish | — | 1452 |
Instruction Following Grok 4.5 leads
Amazon Nova Experimental Chat 10 09: 69.7 (#167), Grok 4.5: 76.3 (#45)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4.5 |
|---|---|---|
| LMArena Instruction Following | 1316 | 1446 |
Long Context Grok 4.5 leads
Amazon Nova Experimental Chat 10 09: 40.6 (#146), Grok 4.5: 44.8 (#54)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4.5 |
|---|---|---|
| LMArena Longer Query | 1334 | 1463 |
Writing & Preference Grok 4.5 leads
Amazon Nova Experimental Chat 10 09: 55.0 (#144), Grok 4.5: 65.9 (#40)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4.5 |
|---|---|---|
| LMArena Text | 1365 | 1448 |
| LMArena Creative Writing | 1307 | 1442 |
| LMArena Multi-Turn | 1354 | 1457 |
| EQ-Bench Creative Writing | — | 1579 |
Frequently asked questions
Is Amazon Nova Experimental Chat 10 09 better than Grok 4.5?
Grok 4.5 is the stronger model overall, scoring 55.0 to 41.4 on the Noometry Index.
Is Amazon Nova Experimental Chat 10 09 or Grok 4.5 better for coding?
Grok 4.5 scores higher on coding benchmarks: 51.7 versus 39.6 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 10 09 and Grok 4.5 share?
9 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 09 has 9 scored results on Noometry and Grok 4.5 has 52.