Model comparison
Amazon Nova Experimental Chat 12 10 vs Claude Opus 4.5
Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 42.3 on the Noometry Index.
Last verified . 12 shared benchmarks.
Summary
- They share 12 benchmarks with published results for both. Amazon Nova Experimental Chat 12 10 scores higher in 0 categories and Claude Opus 4.5 in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Claude Opus 4.5 leads 56.4 to 38.6.
Side by side
| Amazon Nova Experimental Chat 12 10 | Claude Opus 4.5 | |
|---|---|---|
| Provider | Amazon | Anthropic |
| Noometry Index | 42.3 | 50.5 |
| Released | — | 2025-11-01 |
| Weights | Proprietary | Proprietary |
| Context window | — | 200K |
| Max output | — | 64K |
| Input $ / M tokens | — | $5 |
| Output $ / M tokens | — | $25 |
| Results tracked | 12 | 69 |
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Category by category
Coding Claude Opus 4.5 leads
Amazon Nova Experimental Chat 12 10: 41.5 (#112), Claude Opus 4.5: 55.4 (#21)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 4.5 |
|---|---|---|
| LMArena Coding | 1430 | 1504 |
| SWE-bench Verified | — | 76.7% |
| SWE-bench Verified (bash only) | — | 76.8% |
| LMArena WebDev | — | 1493 |
| SWE-bench Multilingual | — | 70.7% |
| GSO | — | 26.5% |
| WeirdML | — | 63.7% |
| ALE-Bench | — | 1,025 |
| AlgoTune | — | 1.77 |
Agentic & Tool Use Not comparable
Amazon Nova Experimental Chat 12 10: —, Claude Opus 4.5: 47.2 (#11)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 4.5 |
|---|---|---|
| Terminal-Bench | — | 63.1% |
| Berkeley Function Calling Leaderboard | — | 77.5% |
| GDPval | — | 45.5% |
| Remote Labor Index | — | 3.8% |
| τ²-bench Airline | — | 84% |
| τ²-bench Banking | — | 24.7% |
| τ²-bench Retail | — | 79.6% |
| τ²-bench Telecom | — | 92.3% |
| Cybench | — | 82% |
| DeepResearch Bench | — | 54.8% |
| OSWorld | — | 66.3% |
| BALROG | — | 43.5% |
| LMArena Search | — | 1180 |
| METR Time Horizons | — | 75% |
| Vending-Bench 2 | — | 4,967 |
Reasoning Claude Opus 4.5 leads
Amazon Nova Experimental Chat 12 10: 28.1 (#93), Claude Opus 4.5: 42.5 (#43)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 4.5 |
|---|---|---|
| LMArena Hard Prompts | 1427 | 1476 |
| ARC-AGI-2 | — | 37.6% |
| SimpleBench | — | 62% |
| Kagi LLM Benchmark | — | 80.2% |
| NYT Connections (extended) | — | 52.5% |
| ARC-AGI-1 | — | 80% |
| Chess Puzzles | — | 12% |
| EnigmaEval | — | 11.9% |
| EBR-Bench | — | 14.3% |
| Mystery Game Puzzles | — | 22% |
| DTBench | — | 89.9% |
| LMCA | — | 44.5% |
| Epoch Capabilities Index | — | 150.1 |
| ForecastBench | — | 60.7 |
Math Claude Opus 4.5 leads
Amazon Nova Experimental Chat 12 10: 36.1 (#130), Claude Opus 4.5: 38.5 (#85)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 4.5 |
|---|---|---|
| LMArena Math | 1418 | 1463 |
| FrontierMath (Tiers 1-3) | — | 34.4% |
| FrontierMath Tier 4 | — | 4.9% |
| OTIS Mock AIME 2024-2025 | — | 86.1% |
| ProofBench | — | 36% |
| FrontierMath (Feb 2025 set) | — | 20.7% |
| FrontierMath Tier 4 (v1) | — | 4.2% |
Knowledge Claude Opus 4.5 leads
Amazon Nova Experimental Chat 12 10: 38.6 (#133), Claude Opus 4.5: 56.4 (#38)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 4.5 |
|---|---|---|
| LMArena Expert | 1409 | 1488 |
| GPQA Diamond | — | 86% |
| Humanity's Last Exam | — | 25.2% |
| SimpleQA Verified | — | 45.7% |
| Vectara Hallucination Rate | — | 10.9% |
Multimodal Not comparable
Amazon Nova Experimental Chat 12 10: —, Claude Opus 4.5: 31.1 (#99)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 4.5 |
|---|---|---|
| GeoBench | — | 75% |
| VPCT | — | 40% |
| Furniture Assembly | — | 28.3% |
| LMArena Document | — | 1462 |
Multilingual Claude Opus 4.5 leads
Amazon Nova Experimental Chat 12 10: 51.7 (#103), Claude Opus 4.5: 54.5 (#45)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 4.5 |
|---|---|---|
| LMArena Non-English | 1399 | 1438 |
| LMArena Chinese | 1440 | 1470 |
| LMArena Russian | 1397 | 1448 |
| LMArena French | — | 1471 |
| LMArena German | — | 1449 |
| LMArena Japanese | — | 1415 |
| LMArena Korean | — | 1424 |
| LMArena Spanish | — | 1455 |
Instruction Following Claude Opus 4.5 leads
Amazon Nova Experimental Chat 12 10: 73.4 (#117), Claude Opus 4.5: 77.7 (#20)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 4.5 |
|---|---|---|
| LMArena Instruction Following | 1387 | 1478 |
Long Context Claude Opus 4.5 leads
Amazon Nova Experimental Chat 12 10: 42.4 (#120), Claude Opus 4.5: 46.4 (#21)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 4.5 |
|---|---|---|
| LMArena Longer Query | 1391 | 1480 |
| CL-bench | — | 21.1% |
Writing & Preference Claude Opus 4.5 leads
Amazon Nova Experimental Chat 12 10: 59.7 (#104), Claude Opus 4.5: 68.2 (#28)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 4.5 |
|---|---|---|
| LMArena Text | 1420 | 1451 |
| LMArena Creative Writing | 1351 | 1445 |
| LMArena Multi-Turn | 1409 | 1466 |
| EQ-Bench Creative Writing | — | 1687 |
Frequently asked questions
Is Amazon Nova Experimental Chat 12 10 better than Claude Opus 4.5?
Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 42.3 on the Noometry Index.
Is Amazon Nova Experimental Chat 12 10 or Claude Opus 4.5 better for coding?
Claude Opus 4.5 scores higher on coding benchmarks: 55.4 versus 41.5 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 12 10 and Claude Opus 4.5 share?
12 benchmarks have published results for both models. Amazon Nova Experimental Chat 12 10 has 12 scored results on Noometry and Claude Opus 4.5 has 69.