Model comparison
Amazon Nova Experimental Chat 26 02 10 vs Claude Sonnet 4.5
Amazon Nova Experimental Chat 26 02 10 and Claude Sonnet 4.5 score almost the same on the Noometry Index (44.5 vs 44.1), so choose on price, context window or the category you care about most.
Last verified . 12 shared benchmarks.
Summary
- They share 12 benchmarks with published results for both. Amazon Nova Experimental Chat 26 02 10 scores higher in 4 categories and Claude Sonnet 4.5 in 4 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in math, where Amazon Nova Experimental Chat 26 02 10 leads 39.3 to 32.3.
Side by side
| Amazon Nova Experimental Chat 26 02 10 | Claude Sonnet 4.5 | |
|---|---|---|
| Provider | Amazon | Anthropic |
| Noometry Index | 44.5 | 44.1 |
| Released | — | 2025-09-29 |
| Weights | Proprietary | Proprietary |
| Context window | — | 200K |
| Max output | — | 64K |
| Input $ / M tokens | — | $3 |
| Output $ / M tokens | — | $15 |
| Results tracked | 12 | 73 |
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Category by category
Coding Claude Sonnet 4.5 leads
Amazon Nova Experimental Chat 26 02 10: 43.9 (#82), Claude Sonnet 4.5: 47.3 (#61)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Coding | 1483 | 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 Not comparable
Amazon Nova Experimental Chat 26 02 10: —, Claude Sonnet 4.5: 38.3 (#32)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | 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 26 02 10 leads
Amazon Nova Experimental Chat 26 02 10: 30.1 (#86), Claude Sonnet 4.5: 26.9 (#125)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Hard Prompts | 1458 | 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 26 02 10 leads
Amazon Nova Experimental Chat 26 02 10: 39.3 (#109), Claude Sonnet 4.5: 32.3 (#216)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Math | 1438 | 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 Claude Sonnet 4.5 leads
Amazon Nova Experimental Chat 26 02 10: 42.3 (#97), Claude Sonnet 4.5: 48.4 (#76)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Expert | 1506 | 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 Not comparable
Amazon Nova Experimental Chat 26 02 10: —, Claude Sonnet 4.5: 34.8 (#89)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Sonnet 4.5 |
|---|---|---|
| VPCT | — | 39.8% |
| LMArena Document | — | 1450 |
Multilingual Too close to call
Amazon Nova Experimental Chat 26 02 10: 54.0 (#50), Claude Sonnet 4.5: 53.4 (#69)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Non-English | 1434 | 1425 |
| LMArena Chinese | 1463 | 1459 |
| LMArena Russian | 1423 | 1437 |
| LMArena French | — | 1458 |
| LMArena German | — | 1427 |
| LMArena Japanese | — | 1390 |
| LMArena Korean | — | 1403 |
| LMArena Spanish | — | 1457 |
Instruction Following Too close to call
Amazon Nova Experimental Chat 26 02 10: 75.2 (#69), Claude Sonnet 4.5: 75.0 (#78)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Instruction Following | 1427 | 1459 |
| IFEval | — | 85% |
Long Context Claude Sonnet 4.5 leads
Amazon Nova Experimental Chat 26 02 10: 44.0 (#77), Claude Sonnet 4.5: 45.2 (#46)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Longer Query | 1441 | 1476 |
Writing & Preference Claude Sonnet 4.5 leads
Amazon Nova Experimental Chat 26 02 10: 61.8 (#84), Claude Sonnet 4.5: 66.5 (#34)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Sonnet 4.5 |
|---|---|---|
| LMArena Text | 1448 | 1439 |
| LMArena Creative Writing | 1368 | 1442 |
| LMArena Multi-Turn | 1442 | 1465 |
| EQ-Bench Creative Writing | — | 1678 |
| WildBench | — | 85.4% |
Frequently asked questions
Is Amazon Nova Experimental Chat 26 02 10 better than Claude Sonnet 4.5?
Amazon Nova Experimental Chat 26 02 10 and Claude Sonnet 4.5 score almost the same on the Noometry Index (44.5 vs 44.1), so choose on price, context window or the category you care about most.
Is Amazon Nova Experimental Chat 26 02 10 or Claude Sonnet 4.5 better for coding?
Claude Sonnet 4.5 scores higher on coding benchmarks: 47.3 versus 43.9 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 26 02 10 and Claude Sonnet 4.5 share?
12 benchmarks have published results for both models. Amazon Nova Experimental Chat 26 02 10 has 12 scored results on Noometry and Claude Sonnet 4.5 has 73.