# 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.

- Canonical page: https://noometry.com/compare/amazon-nova-experimental-chat-10-20-vs-claude-opus-4
- Last updated: 2026-10-10
- Shared benchmarks: 17

## 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.

## Snapshot

| | Amazon Nova Experimental Chat 10 20 | Claude Opus 4 |
|---|---|---|
| Provider | Amazon | Anthropic |
| Noometry Index | 41.5 | 42.9 |
| Rank | 122 | 93 |
| Context | — | 200K |
| Input $/M | — | $15 |
| Output $/M | — | $75 |
| Weights | Proprietary | Proprietary |

## Coding

- 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

- 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

- 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

- 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

- 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

- 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

- 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

- 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: 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

- 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% |

## FAQ

### 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.