# Amazon Nova Experimental Chat 10 20 vs Claude Sonnet 4.5

> Claude Sonnet 4.5 is the stronger model overall, scoring 44.1 to 42.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/amazon-nova-experimental-chat-10-20-vs-claude-sonnet-4-5
- Last updated: 2026-10-12
- 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 Sonnet 4.5 in 6 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Claude Sonnet 4.5 leads 48.4 to 38.5.

## Snapshot

| | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 4.5 |
|---|---|---|
| Provider | Amazon | Anthropic |
| Noometry Index | 42.1 | 44.1 |
| Rank | 118 | 81 |
| Context | — | 200K |
| Input $/M | — | $3 |
| Output $/M | — | $15 |
| Weights | Proprietary | Proprietary |

## Coding

- Amazon Nova Experimental Chat 10 20: 41.6 (#123)
- Claude Sonnet 4.5: 47.3 (#61)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Coding | 1412 | 1489 |
| SWE-bench Verified | — | 71.3% |
| SWE-bench Verified (bash only) | — | 71.4% |
| LMArena WebDev | — | 1393 |
| SWE-bench Multilingual | — | 67% |
| SciCode | — | 44.7% |
| GSO | — | 14.7% |
| WeirdML | — | 47.7% |
| ALE-Bench | — | 796.15 |
| AlgoTune | — | 1.52 |

## Agentic & Tool Use

- Amazon Nova Experimental Chat 10 20: —
- Claude Sonnet 4.5: 38.3 (#32)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 4.5 |
|---|---|---|
| Terminal-Bench | — | 46.5% |
| Berkeley Function Calling Leaderboard | — | 73.2% |
| GDPval | — | 42.5% |
| Remote Labor Index | — | 2.1% |
| τ²-bench Airline | — | 72% |
| τ²-bench Banking | — | 25.3% |
| τ²-bench Retail | — | 72.4% |
| τ²-bench Telecom | — | 84.9% |
| Cybench | — | 60% |
| DeepResearch Bench | — | 52.6% |
| OSWorld | — | 62.9% |
| LMArena Search | — | 1159 |
| METR Time Horizons | — | 67.4% |
| Vending-Bench 2 | — | 3,839 |

## Reasoning

- Amazon Nova Experimental Chat 10 20: 28.4 (#106)
- Claude Sonnet 4.5: 26.9 (#125)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Hard Prompts | 1396 | 1462 |
| ARC-AGI-2 | — | 13.6% |
| SimpleBench | — | 54.3% |
| Kagi LLM Benchmark | — | 57.9% |
| NYT Connections (extended) | — | 37.3% |
| ARC-AGI-1 | — | 63.7% |
| CritPt | — | 1.1% |
| Chess Puzzles | — | 12% |
| EnigmaEval | — | 6% |
| EBR-Bench | — | 2.4% |
| Mystery Game Puzzles | — | 17% |
| DTBench | — | 83.2% |
| LMCA | — | 38.8% |
| Epoch Capabilities Index | — | 146.84 |
| ForecastBench | — | 61.9 |

## Math

- Amazon Nova Experimental Chat 10 20: 39.0 (#119)
- Claude Sonnet 4.5: 32.3 (#216)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Math | 1425 | 1449 |
| FrontierMath (Tiers 1-3) | — | 23.9% |
| FrontierMath Tier 4 | — | 2.4% |
| OTIS Mock AIME 2024-2025 | — | 77.8% |
| ProofBench | — | 19% |
| Omni-MATH | — | 55.3% |
| MATH Level 5 | — | 97.7% |
| FrontierMath (Feb 2025 set) | — | 15.2% |
| FrontierMath Tier 4 (v1) | — | 4.2% |

## Knowledge

- Amazon Nova Experimental Chat 10 20: 38.5 (#144)
- Claude Sonnet 4.5: 48.4 (#76)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Expert | 1386 | 1482 |
| GPQA Diamond | — | 82.3% |
| Humanity's Last Exam | — | 13.7% |
| SimpleQA Verified | — | 30.7% |
| MMLU-Pro | — | 86.9% |
| Vectara Hallucination Rate | — | 12% |
| GPQA (HELM) | — | 68.6% |

## Multimodal

- Amazon Nova Experimental Chat 10 20: —
- Claude Sonnet 4.5: 34.8 (#89)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 4.5 |
|---|---|---|
| VPCT | — | 39.8% |
| LMArena Document | — | 1450 |

## Multilingual

- Amazon Nova Experimental Chat 10 20: 49.5 (#131)
- Claude Sonnet 4.5: 53.4 (#69)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Non-English | 1372 | 1425 |
| LMArena Chinese | 1404 | 1459 |
| LMArena French | 1425 | 1458 |
| LMArena German | 1391 | 1427 |
| LMArena Japanese | 1360 | 1390 |
| LMArena Korean | 1324 | 1403 |
| LMArena Russian | 1371 | 1437 |
| LMArena Spanish | 1382 | 1457 |

## Instruction Following

- Amazon Nova Experimental Chat 10 20: 72.1 (#141)
- Claude Sonnet 4.5: 75.0 (#78)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Instruction Following | 1365 | 1459 |
| IFEval | — | 85% |

## Long Context

- Amazon Nova Experimental Chat 10 20: 41.7 (#133)
- Claude Sonnet 4.5: 45.2 (#46)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Longer Query | 1370 | 1476 |

## Writing & Preference

- Amazon Nova Experimental Chat 10 20: 56.6 (#136)
- Claude Sonnet 4.5: 66.5 (#34)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Text | 1394 | 1439 |
| LMArena Creative Writing | 1318 | 1442 |
| LMArena Multi-Turn | 1364 | 1465 |
| EQ-Bench Creative Writing | — | 1678 |
| WildBench | — | 85.4% |

## FAQ

### Is Amazon Nova Experimental Chat 10 20 better than Claude Sonnet 4.5?

Claude Sonnet 4.5 is the stronger model overall, scoring 44.1 to 42.1 on the Noometry Index.

### Is Amazon Nova Experimental Chat 10 20 or Claude Sonnet 4.5 better for coding?

Claude Sonnet 4.5 scores higher on coding benchmarks: 47.3 versus 41.6 in the Noometry coding category.

### How many benchmarks do Amazon Nova Experimental Chat 10 20 and Claude Sonnet 4.5 share?

17 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 20 has 17 scored results on Noometry and Claude Sonnet 4.5 has 73.