Model comparison
Amazon Nova Experimental Chat 26 02 10 vs Claude Fable 5.1
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 44.5 on the Noometry Index.
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 0 categories and Claude Fable 5.1 in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Fable 5.1 leads 89.6 to 39.3.
Side by side
| Amazon Nova Experimental Chat 26 02 10 | Claude Fable 5.1 | |
|---|---|---|
| Provider | Amazon | Anthropic |
| Noometry Index | 44.5 | 69.0 |
| Released | — | 2026-09-01 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1M |
| Max output | — | 128K |
| Input $ / M tokens | — | $10 |
| Output $ / M tokens | — | $50 |
| Results tracked | 12 | 52 |
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Category by category
Coding Claude Fable 5.1 leads
Amazon Nova Experimental Chat 26 02 10: 43.9 (#82), Claude Fable 5.1: 74.7 (#1)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Fable 5.1 |
|---|---|---|
| LMArena Coding | 1483 | 1528 |
| FrontierCode | — | 50.9% |
| CursorBench | — | 51.8% |
| LMArena WebDev | — | 1744 |
| FrontierSWE | — | 56.3% |
| SciCode | — | 63.1% |
| GSO | — | 88.2% |
| WeirdML | — | 92.9% |
| MirrorCode | — | 73.3% |
| ALE-Bench | — | 2,143 |
Agentic & Tool Use Not comparable
Amazon Nova Experimental Chat 26 02 10: —, Claude Fable 5.1: 50.7 (#5)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Fable 5.1 |
|---|---|---|
| APEX-Agents | — | 68.6% |
| Remote Labor Index | — | 17.9% |
| GDP.pdf | — | 29.6% |
| Vending-Bench 2 | — | 5,422 |
Reasoning Claude Fable 5.1 leads
Amazon Nova Experimental Chat 26 02 10: 30.1 (#86), Claude Fable 5.1: 76.7 (#7)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Fable 5.1 |
|---|---|---|
| LMArena Hard Prompts | 1458 | 1526 |
| ARC-AGI-2 | — | 90% |
| NYT Connections (extended) | — | 90% |
| ARC-AGI-1 | — | 97.5% |
| CritPt | — | 31.1% |
| Chess Puzzles | — | 47% |
| EBR-Bench | — | 57.1% |
| Mystery Game Puzzles | — | 58% |
| DTBench | — | 97.6% |
| LMCA | — | 65.5% |
| Epoch Capabilities Index | — | 164.7 |
Math Claude Fable 5.1 leads
Amazon Nova Experimental Chat 26 02 10: 39.3 (#109), Claude Fable 5.1: 89.6 (#4)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Fable 5.1 |
|---|---|---|
| LMArena Math | 1438 | 1525 |
| FrontierMath (Tiers 1-3) | — | 90.2% |
| FrontierMath Tier 4 | — | 87.8% |
| OTIS Mock AIME 2024-2025 | — | 100% |
| ProofBench | — | 100% |
| FrontierMath Erdős | — | 0% |
Knowledge Claude Fable 5.1 leads
Amazon Nova Experimental Chat 26 02 10: 42.3 (#97), Claude Fable 5.1: 69.6 (#6)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Fable 5.1 |
|---|---|---|
| LMArena Expert | 1506 | 1535 |
| Humanity's Last Exam | — | 46.5% |
| SimpleQA Verified | — | 70.8% |
Multimodal Not comparable
Amazon Nova Experimental Chat 26 02 10: —, Claude Fable 5.1: 53.9 (#4)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Fable 5.1 |
|---|---|---|
| LMArena Vision | — | 1318 |
| Blueprint-Bench 2 | — | 41.9% |
| Furniture Assembly | — | 70% |
| LMArena Document | — | 1513 |
Multilingual Claude Fable 5.1 leads
Amazon Nova Experimental Chat 26 02 10: 54.0 (#50), Claude Fable 5.1: 59.1 (#3)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Fable 5.1 |
|---|---|---|
| LMArena Non-English | 1434 | 1507 |
| LMArena Chinese | 1463 | 1586 |
| LMArena Russian | 1423 | 1521 |
| LMArena French | — | 1525 |
| LMArena German | — | 1500 |
| LMArena Japanese | — | 1543 |
| LMArena Korean | — | 1534 |
| LMArena Spanish | — | 1516 |
Instruction Following Claude Fable 5.1 leads
Amazon Nova Experimental Chat 26 02 10: 75.2 (#69), Claude Fable 5.1: 79.2 (#6)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Fable 5.1 |
|---|---|---|
| LMArena Instruction Following | 1427 | 1517 |
Long Context Claude Fable 5.1 leads
Amazon Nova Experimental Chat 26 02 10: 44.0 (#77), Claude Fable 5.1: 46.7 (#20)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Fable 5.1 |
|---|---|---|
| LMArena Longer Query | 1441 | 1522 |
Writing & Preference Claude Fable 5.1 leads
Amazon Nova Experimental Chat 26 02 10: 61.8 (#84), Claude Fable 5.1: 79.2 (#2)
| Benchmark | Amazon Nova Experimental Chat 26 02 10 | Claude Fable 5.1 |
|---|---|---|
| LMArena Text | 1448 | 1510 |
| LMArena Creative Writing | 1368 | 1507 |
| LMArena Multi-Turn | 1442 | 1492 |
| EQ-Bench Creative Writing | — | 2162 |
Frequently asked questions
Is Amazon Nova Experimental Chat 26 02 10 better than Claude Fable 5.1?
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 44.5 on the Noometry Index.
Is Amazon Nova Experimental Chat 26 02 10 or Claude Fable 5.1 better for coding?
Claude Fable 5.1 scores higher on coding benchmarks: 74.7 versus 43.9 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 26 02 10 and Claude Fable 5.1 share?
12 benchmarks have published results for both models. Amazon Nova Experimental Chat 26 02 10 has 12 scored results on Noometry and Claude Fable 5.1 has 52.