Model comparison
Amazon Nova Experimental Chat 10 20 vs Claude Opus 4
Claude Opus 4 is the stronger model overall, scoring 42.9 to 41.5 on the Noometry Index.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. Amazon Nova Experimental Chat 10 20 scores higher in 2 categories and Claude Opus 4 in 6 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in coding, where Claude Opus 4 leads 47.8 to 41.0.
Side by side
| Amazon Nova Experimental Chat 10 20 | Claude Opus 4 | |
|---|---|---|
| Provider | Amazon | Anthropic |
| Noometry Index | 41.5 | 42.9 |
| Released | — | 2025-05-22 |
| Weights | Proprietary | Proprietary |
| Context window | — | 200K |
| Max output | — | 32K |
| Input $ / M tokens | — | $15 |
| Output $ / M tokens | — | $75 |
| Results tracked | 17 | 56 |
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Category by category
Coding Claude Opus 4 leads
Amazon Nova Experimental Chat 10 20: 41.0 (#123), Claude Opus 4: 47.8 (#55)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4 |
|---|---|---|
| LMArena Coding | 1413 | 1442 |
| SWE-bench Verified | — | 70.7% |
| SWE-bench Verified (bash only) | — | 67.6% |
| Aider Polyglot | — | 72% |
| GSO | — | 6.9% |
| WeirdML | — | 43.7% |
| AlgoTune | — | 1.33 |
Agentic & Tool Use Not comparable
Amazon Nova Experimental Chat 10 20: —, Claude Opus 4: 34.5 (#39)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4 |
|---|---|---|
| Cybench | — | 38% |
| DeepResearch Bench | — | 46.8% |
| LMArena Search | — | 1127 |
| METR Time Horizons | — | 63.9% |
Reasoning Too close to call
Amazon Nova Experimental Chat 10 20: 27.3 (#110), Claude Opus 4: 27.4 (#104)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4 |
|---|---|---|
| LMArena Hard Prompts | 1396 | 1399 |
| ARC-AGI-2 | — | 8.6% |
| SimpleBench | — | 58.8% |
| Kagi LLM Benchmark | — | 74.3% |
| ARC-AGI-1 | — | 35.7% |
| CritPt | — | 0.3% |
| EnigmaEval | — | 5.6% |
| DTBench | — | 81.6% |
| LMCA | — | 37.4% |
| Epoch Capabilities Index | — | 142.67 |
| ForecastBench | — | 61.1 |
Math Claude Opus 4 leads
Amazon Nova Experimental Chat 10 20: 36.2 (#121), Claude Opus 4: 40.2 (#80)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4 |
|---|---|---|
| LMArena Math | 1425 | 1391 |
| OTIS Mock AIME 2024-2025 | — | 64.4% |
| Omni-MATH | — | 61.6% |
| MATH Level 5 | — | 85% |
| FrontierMath (Feb 2025 set) | — | 4.5% |
| FrontierMath Tier 4 (v1) | — | 4.2% |
Knowledge Claude Opus 4 leads
Amazon Nova Experimental Chat 10 20: 37.8 (#142), Claude Opus 4: 43.9 (#82)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4 |
|---|---|---|
| LMArena Expert | 1385 | 1384 |
| GPQA Diamond | — | 76.3% |
| Humanity's Last Exam | — | 10.7% |
| MMLU-Pro | — | 87.5% |
| Confabulations | — | 15.9% |
| Vectara Hallucination Rate | — | 12% |
| GPQA (HELM) | — | 70.8% |
Multimodal Not comparable
Amazon Nova Experimental Chat 10 20: —, Claude Opus 4: 30.9 (#101)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4 |
|---|---|---|
| LMArena Vision | — | 1192 |
| GeoBench | — | 49% |
| VPCT | — | 38% |
Multilingual Too close to call
Amazon Nova Experimental Chat 10 20: 49.7 (#127), Claude Opus 4: 49.0 (#133)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4 |
|---|---|---|
| LMArena Non-English | 1372 | 1362 |
| LMArena Chinese | 1405 | 1386 |
| LMArena French | 1426 | 1370 |
| LMArena German | 1391 | 1391 |
| LMArena Japanese | 1355 | 1332 |
| LMArena Korean | 1327 | 1318 |
| LMArena Russian | 1371 | 1392 |
| LMArena Spanish | 1381 | 1388 |
Instruction Following Claude Opus 4 leads
Amazon Nova Experimental Chat 10 20: 72.3 (#136), Claude Opus 4: 77.3 (#26)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4 |
|---|---|---|
| LMArena Instruction Following | 1365 | 1406 |
| IFEval | — | 91.8% |
Long Context Amazon Nova Experimental Chat 10 20 leads
Amazon Nova Experimental Chat 10 20: 41.7 (#128), Claude Opus 4: 39.5 (#167)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4 |
|---|---|---|
| LMArena Longer Query | 1370 | 1422 |
| Fiction.LiveBench | — | 61.1% |
Writing & Preference Claude Opus 4 leads
Amazon Nova Experimental Chat 10 20: 56.9 (#131), Claude Opus 4: 61.4 (#85)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4 |
|---|---|---|
| LMArena Text | 1394 | 1377 |
| LMArena Creative Writing | 1318 | 1386 |
| LMArena Multi-Turn | 1364 | 1396 |
| Short-Story Creative Writing | — | 83.6% |
| EQ-Bench Creative Writing | — | 1580 |
| WildBench | — | 85.2% |
Frequently asked questions
Is Amazon Nova Experimental Chat 10 20 better than Claude Opus 4?
Claude Opus 4 is the stronger model overall, scoring 42.9 to 41.5 on the Noometry Index.
Is Amazon Nova Experimental Chat 10 20 or Claude Opus 4 better for coding?
Claude Opus 4 scores higher on coding benchmarks: 47.8 versus 41.0 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 10 20 and Claude Opus 4 share?
17 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 20 has 17 scored results on Noometry and Claude Opus 4 has 56.