Model comparison
Amazon Nova Experimental Chat 12 10 vs Claude Opus 5
Claude Opus 5 is the stronger model overall, scoring 67.8 to 42.9 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 5 in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Claude Opus 5 leads 77.2 to 29.3.
Side by side
| Amazon Nova Experimental Chat 12 10 | Claude Opus 5 | |
|---|---|---|
| Provider | Amazon | Anthropic |
| Noometry Index | 42.9 | 67.8 |
| Released | — | 2026-07-24 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1M |
| Max output | — | 128K |
| Input $ / M tokens | — | $5 |
| Output $ / M tokens | — | $25 |
| Results tracked | 12 | 57 |
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Category by category
Coding Claude Opus 5 leads
Amazon Nova Experimental Chat 12 10: 42.2 (#110), Claude Opus 5: 67.5 (#5)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 5 |
|---|---|---|
| LMArena Coding | 1430 | 1534 |
| DeepSWE | — | 73.6% |
| FrontierCode | — | 53.4% |
| CursorBench | — | 46.6% |
| LMArena WebDev | — | 1691 |
| FrontierSWE | — | 52% |
| SciCode | — | 56.4% |
| WeirdML | — | 91.8% |
| ALE-Bench | — | 2,165 |
Agentic & Tool Use Not comparable
Amazon Nova Experimental Chat 12 10: —, Claude Opus 5: 55.6 (#1)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 5 |
|---|---|---|
| APEX-Agents | — | 65.8% |
| OSWorld 2.0 | — | 31.4% |
| τ²-bench Banking | — | 48.7% |
| PostTrainBench | — | 35% |
| BALROG | — | 63.4% |
| GBAEval | — | 79.6% |
| GDP.pdf | — | 24% |
| Vending-Bench 2 | — | 11,182 |
Reasoning Claude Opus 5 leads
Amazon Nova Experimental Chat 12 10: 29.3 (#94), Claude Opus 5: 77.2 (#4)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 5 |
|---|---|---|
| LMArena Hard Prompts | 1427 | 1526 |
| ARC-AGI-2 | — | 90.4% |
| SimpleBench | — | 80.6% |
| NYT Connections (extended) | — | 94.3% |
| ARC-AGI-1 | — | 97.5% |
| CritPt | — | 29.1% |
| Chess Puzzles | — | 42% |
| EBR-Bench | — | 45.7% |
| Mystery Game Puzzles | — | 59% |
| DTBench | — | 97.9% |
| LMCA | — | 64.5% |
| Bench to the Future 3 | — | 0.12 |
| Epoch Capabilities Index | — | 162.78 |
Math Claude Opus 5 leads
Amazon Nova Experimental Chat 12 10: 38.9 (#124), Claude Opus 5: 86.2 (#8)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 5 |
|---|---|---|
| LMArena Math | 1419 | 1531 |
| FrontierMath (Tiers 1-3) | — | 85.6% |
| FrontierMath Tier 4 | — | 73.2% |
| OTIS Mock AIME 2024-2025 | — | 98.9% |
| ProofBench | — | 99% |
Knowledge Claude Opus 5 leads
Amazon Nova Experimental Chat 12 10: 39.2 (#136), Claude Opus 5: 66.8 (#9)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 5 |
|---|---|---|
| LMArena Expert | 1408 | 1557 |
| GPQA Diamond | — | 93.9% |
| SimpleQA Verified | — | 59.9% |
Multimodal Not comparable
Amazon Nova Experimental Chat 12 10: —, Claude Opus 5: 50.8 (#8)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 5 |
|---|---|---|
| LMArena Vision | — | 1319 |
| Blueprint-Bench 2 | — | 30.4% |
| Furniture Assembly | — | 60.8% |
| LMArena Document | — | 1516 |
Multilingual Claude Opus 5 leads
Amazon Nova Experimental Chat 12 10: 51.4 (#108), Claude Opus 5: 58.8 (#4)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 5 |
|---|---|---|
| LMArena Non-English | 1398 | 1501 |
| LMArena Chinese | 1440 | 1574 |
| LMArena Russian | 1395 | 1507 |
| LMArena French | — | 1519 |
| LMArena German | — | 1524 |
| LMArena Japanese | — | 1516 |
| LMArena Korean | — | 1521 |
| LMArena Spanish | — | 1519 |
Instruction Following Claude Opus 5 leads
Amazon Nova Experimental Chat 12 10: 73.2 (#123), Claude Opus 5: 79.2 (#7)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 5 |
|---|---|---|
| LMArena Instruction Following | 1387 | 1517 |
Long Context Claude Opus 5 leads
Amazon Nova Experimental Chat 12 10: 42.4 (#125), Claude Opus 5: 46.5 (#21)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 5 |
|---|---|---|
| LMArena Longer Query | 1391 | 1515 |
Writing & Preference Claude Opus 5 leads
Amazon Nova Experimental Chat 12 10: 59.5 (#110), Claude Opus 5: 79.2 (#1)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Claude Opus 5 |
|---|---|---|
| LMArena Text | 1420 | 1507 |
| LMArena Creative Writing | 1350 | 1491 |
| LMArena Multi-Turn | 1409 | 1499 |
| EQ-Bench Creative Writing | — | 2133 |
| EQ-Bench 4 | — | 1385 |
Frequently asked questions
Is Amazon Nova Experimental Chat 12 10 better than Claude Opus 5?
Claude Opus 5 is the stronger model overall, scoring 67.8 to 42.9 on the Noometry Index.
Is Amazon Nova Experimental Chat 12 10 or Claude Opus 5 better for coding?
Claude Opus 5 scores higher on coding benchmarks: 67.5 versus 42.2 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 12 10 and Claude Opus 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 5 has 57.