Model comparison
Amazon Nova Experimental Chat 10 20 vs Claude Opus 4.1
Amazon Nova Experimental Chat 10 20 is the stronger model overall, scoring 42.1 to 41.0 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 1 category and Claude Opus 4.1 in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Amazon Nova Experimental Chat 10 20 leads 39.0 to 22.3.
Side by side
| Amazon Nova Experimental Chat 10 20 | Claude Opus 4.1 | |
|---|---|---|
| Provider | Amazon | Anthropic |
| Noometry Index | 42.1 | 41.0 |
| Released | — | 2025-08-05 |
| Weights | Proprietary | Proprietary |
| Context window | — | 200K |
| Max output | — | 32K |
| Input $ / M tokens | — | $15 |
| Output $ / M tokens | — | $75 |
| Results tracked | 17 | 48 |
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Category by category
Coding Claude Opus 4.1 leads
Amazon Nova Experimental Chat 10 20: 41.6 (#123), Claude Opus 4.1: 44.4 (#73)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4.1 |
|---|---|---|
| LMArena Coding | 1412 | 1479 |
| SWE-bench Verified | — | 73.3% |
| LMArena WebDev | — | 1390 |
| WeirdML | — | 45.9% |
| ALE-Bench | — | 674.77 |
| AlgoTune | — | 1.34 |
Agentic & Tool Use Not comparable
Amazon Nova Experimental Chat 10 20: —, Claude Opus 4.1: 35.0 (#41)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4.1 |
|---|---|---|
| Terminal-Bench | — | 38% |
| GDPval | — | 43.6% |
| Cybench | — | 42% |
| DeepResearch Bench | — | 48.3% |
| LMArena Search | — | 1148 |
| METR Time Horizons | — | 66.8% |
Reasoning Claude Opus 4.1 leads
Amazon Nova Experimental Chat 10 20: 28.4 (#106), Claude Opus 4.1: 32.2 (#76)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4.1 |
|---|---|---|
| LMArena Hard Prompts | 1396 | 1443 |
| SimpleBench | — | 60% |
| Chess Puzzles | — | 7% |
| EnigmaEval | — | 7.2% |
| EBR-Bench | — | 7.9% |
| Mystery Game Puzzles | — | 21% |
| DTBench | — | 80% |
| LMCA | — | 37.1% |
| Epoch Capabilities Index | — | 144.12 |
| ForecastBench | — | 62 |
Math Amazon Nova Experimental Chat 10 20 leads
Amazon Nova Experimental Chat 10 20: 39.0 (#119), Claude Opus 4.1: 22.3 (#277)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4.1 |
|---|---|---|
| LMArena Math | 1425 | 1431 |
| FrontierMath (Tiers 1-3) | — | 12.6% |
| FrontierMath Tier 4 | — | 2.4% |
| OTIS Mock AIME 2024-2025 | — | 68.9% |
| FrontierMath (Feb 2025 set) | — | 7.2% |
| FrontierMath Tier 4 (v1) | — | 4.2% |
Knowledge Claude Opus 4.1 leads
Amazon Nova Experimental Chat 10 20: 38.5 (#144), Claude Opus 4.1: 42.0 (#101)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4.1 |
|---|---|---|
| LMArena Expert | 1386 | 1439 |
| GPQA Diamond | — | 77.3% |
| Humanity's Last Exam | — | 11.5% |
| Confabulations | — | 17.1% |
| Vectara Hallucination Rate | — | 11.8% |
Multimodal Not comparable
Amazon Nova Experimental Chat 10 20: —, Claude Opus 4.1: 26.8 (#119)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4.1 |
|---|---|---|
| VPCT | — | 35% |
Multilingual Claude Opus 4.1 leads
Amazon Nova Experimental Chat 10 20: 49.5 (#131), Claude Opus 4.1: 52.0 (#95)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4.1 |
|---|---|---|
| LMArena Non-English | 1372 | 1405 |
| LMArena Chinese | 1404 | 1427 |
| LMArena French | 1425 | 1431 |
| LMArena German | 1391 | 1413 |
| LMArena Japanese | 1360 | 1378 |
| LMArena Korean | 1324 | 1380 |
| LMArena Russian | 1371 | 1422 |
| LMArena Spanish | 1382 | 1448 |
Instruction Following Claude Opus 4.1 leads
Amazon Nova Experimental Chat 10 20: 72.1 (#141), Claude Opus 4.1: 75.6 (#58)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4.1 |
|---|---|---|
| LMArena Instruction Following | 1365 | 1435 |
Long Context Claude Opus 4.1 leads
Amazon Nova Experimental Chat 10 20: 41.7 (#133), Claude Opus 4.1: 44.5 (#63)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4.1 |
|---|---|---|
| LMArena Longer Query | 1370 | 1455 |
Writing & Preference Claude Opus 4.1 leads
Amazon Nova Experimental Chat 10 20: 56.6 (#136), Claude Opus 4.1: 62.4 (#74)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Opus 4.1 |
|---|---|---|
| LMArena Text | 1394 | 1419 |
| LMArena Creative Writing | 1318 | 1412 |
| LMArena Multi-Turn | 1364 | 1444 |
| Short-Story Creative Writing | — | 84.7% |
Frequently asked questions
Is Amazon Nova Experimental Chat 10 20 better than Claude Opus 4.1?
Amazon Nova Experimental Chat 10 20 is the stronger model overall, scoring 42.1 to 41.0 on the Noometry Index.
Is Amazon Nova Experimental Chat 10 20 or Claude Opus 4.1 better for coding?
Claude Opus 4.1 scores higher on coding benchmarks: 44.4 versus 41.6 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 10 20 and Claude Opus 4.1 share?
17 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 20 has 17 scored results on Noometry and Claude Opus 4.1 has 48.