Model comparison
Amazon Nova Experimental Chat 10 20 vs Claude Sonnet 5.5
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 42.1 on the Noometry Index.
Last verified . 12 shared benchmarks.
Summary
- They share 12 benchmarks with published results for both. Amazon Nova Experimental Chat 10 20 scores higher in 0 categories and Claude Sonnet 5.5 in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 39.0.
Side by side
| Amazon Nova Experimental Chat 10 20 | Claude Sonnet 5.5 | |
|---|---|---|
| Provider | Amazon | Anthropic |
| Noometry Index | 42.1 | 61.9 |
| Released | — | 2026-09-28 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1M |
| Max output | — | 128K |
| Input $ / M tokens | — | $2 |
| Output $ / M tokens | — | $10 |
| Results tracked | 17 | 32 |
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Category by category
Coding Claude Sonnet 5.5 leads
Amazon Nova Experimental Chat 10 20: 41.6 (#123), Claude Sonnet 5.5: 67.3 (#6)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Coding | 1412 | 1513 |
| FrontierCode | — | 52.1% |
| CursorBench | — | 55.5% |
| LMArena WebDev | — | 1774 |
| FrontierSWE | — | 61.9% |
| SciCode | — | 61% |
| ALE-Bench | — | 1,819 |
Agentic & Tool Use Not comparable
Amazon Nova Experimental Chat 10 20: —, Claude Sonnet 5.5: 45.0 (#16)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 5.5 |
|---|---|---|
| APEX-Agents | — | 75.5% |
Reasoning Claude Sonnet 5.5 leads
Amazon Nova Experimental Chat 10 20: 28.4 (#106), Claude Sonnet 5.5: 54.0 (#28)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Hard Prompts | 1396 | 1495 |
| NYT Connections (extended) | — | 80.5% |
| CritPt | — | 31.4% |
| Mystery Game Puzzles | — | 65% |
| Epoch Capabilities Index | — | 165.03 |
Math Claude Sonnet 5.5 leads
Amazon Nova Experimental Chat 10 20: 39.0 (#119), Claude Sonnet 5.5: 87.9 (#6)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Math | 1425 | 1510 |
| FrontierMath (Tiers 1-3) | — | 88.8% |
| FrontierMath Tier 4 | — | 80.5% |
| OTIS Mock AIME 2024-2025 | — | 100% |
| ProofBench | — | 100% |
| FrontierMath Erdős | — | 2.9% |
Knowledge Claude Sonnet 5.5 leads
Amazon Nova Experimental Chat 10 20: 38.5 (#144), Claude Sonnet 5.5: 66.0 (#12)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Expert | 1386 | 1540 |
| GPQA Diamond | — | 95.6% |
| SimpleQA Verified | — | 46.5% |
Multimodal Not comparable
Amazon Nova Experimental Chat 10 20: —, Claude Sonnet 5.5: 51.5 (#6)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Vision | — | 1289 |
| Furniture Assembly | — | 75% |
Multilingual Claude Sonnet 5.5 leads
Amazon Nova Experimental Chat 10 20: 49.5 (#131), Claude Sonnet 5.5: 55.3 (#30)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Non-English | 1372 | 1452 |
| LMArena Chinese | 1404 | 1522 |
| LMArena Russian | 1371 | 1451 |
| LMArena French | 1425 | — |
| LMArena German | 1391 | — |
| LMArena Japanese | 1360 | — |
| LMArena Korean | 1324 | — |
| LMArena Spanish | 1382 | — |
Instruction Following Claude Sonnet 5.5 leads
Amazon Nova Experimental Chat 10 20: 72.1 (#141), Claude Sonnet 5.5: 78.3 (#11)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Instruction Following | 1365 | 1495 |
Long Context Claude Sonnet 5.5 leads
Amazon Nova Experimental Chat 10 20: 41.7 (#133), Claude Sonnet 5.5: 45.9 (#28)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Longer Query | 1370 | 1498 |
Writing & Preference Claude Sonnet 5.5 leads
Amazon Nova Experimental Chat 10 20: 56.6 (#136), Claude Sonnet 5.5: 66.0 (#40)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Text | 1394 | 1471 |
| LMArena Creative Writing | 1318 | 1465 |
| LMArena Multi-Turn | 1364 | 1474 |
Frequently asked questions
Is Amazon Nova Experimental Chat 10 20 better than Claude Sonnet 5.5?
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 42.1 on the Noometry Index.
Is Amazon Nova Experimental Chat 10 20 or Claude Sonnet 5.5 better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 41.6 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 10 20 and Claude Sonnet 5.5 share?
12 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 20 has 17 scored results on Noometry and Claude Sonnet 5.5 has 32.