Model comparison
Amazon Nova Experimental Chat 10 09 vs Claude Fable 5.1
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 41.9 on the Noometry Index.
Last verified . 9 shared benchmarks.
Summary
- They share 9 benchmarks with published results for both. Amazon Nova Experimental Chat 10 09 scores higher in 0 categories and Claude Fable 5.1 in 6 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Claude Fable 5.1 leads 76.7 to 27.3.
Side by side
| Amazon Nova Experimental Chat 10 09 | Claude Fable 5.1 | |
|---|---|---|
| Provider | Amazon | Anthropic |
| Noometry Index | 41.9 | 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 | 9 | 52 |
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Category by category
Coding Claude Fable 5.1 leads
Amazon Nova Experimental Chat 10 09: 40.2 (#145), Claude Fable 5.1: 74.7 (#1)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Claude Fable 5.1 |
|---|---|---|
| LMArena Coding | 1370 | 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 10 09: —, Claude Fable 5.1: 50.7 (#5)
| Benchmark | Amazon Nova Experimental Chat 10 09 | 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 10 09: 27.3 (#120), Claude Fable 5.1: 76.7 (#7)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Claude Fable 5.1 |
|---|---|---|
| LMArena Hard Prompts | 1356 | 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 Not comparable
Amazon Nova Experimental Chat 10 09: —, Claude Fable 5.1: 89.6 (#4)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Claude Fable 5.1 |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 90.2% |
| FrontierMath Tier 4 | — | 87.8% |
| OTIS Mock AIME 2024-2025 | — | 100% |
| ProofBench | — | 100% |
| LMArena Math | — | 1525 |
| FrontierMath Erdős | — | 0% |
Knowledge Not comparable
Amazon Nova Experimental Chat 10 09: —, Claude Fable 5.1: 69.6 (#6)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Claude Fable 5.1 |
|---|---|---|
| Humanity's Last Exam | — | 46.5% |
| SimpleQA Verified | — | 70.8% |
| LMArena Expert | — | 1535 |
Multimodal Not comparable
Amazon Nova Experimental Chat 10 09: —, Claude Fable 5.1: 53.9 (#4)
| Benchmark | Amazon Nova Experimental Chat 10 09 | 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 10 09: 47.3 (#150), Claude Fable 5.1: 59.1 (#3)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Claude Fable 5.1 |
|---|---|---|
| LMArena Non-English | 1340 | 1507 |
| LMArena Chinese | 1341 | 1586 |
| LMArena French | — | 1525 |
| LMArena German | — | 1500 |
| LMArena Japanese | — | 1543 |
| LMArena Korean | — | 1534 |
| LMArena Russian | — | 1521 |
| LMArena Spanish | — | 1516 |
Instruction Following Claude Fable 5.1 leads
Amazon Nova Experimental Chat 10 09: 69.4 (#172), Claude Fable 5.1: 79.2 (#6)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Claude Fable 5.1 |
|---|---|---|
| LMArena Instruction Following | 1315 | 1517 |
Long Context Claude Fable 5.1 leads
Amazon Nova Experimental Chat 10 09: 40.5 (#152), Claude Fable 5.1: 46.7 (#20)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Claude Fable 5.1 |
|---|---|---|
| LMArena Longer Query | 1333 | 1522 |
Writing & Preference Claude Fable 5.1 leads
Amazon Nova Experimental Chat 10 09: 54.7 (#149), Claude Fable 5.1: 79.2 (#2)
| Benchmark | Amazon Nova Experimental Chat 10 09 | Claude Fable 5.1 |
|---|---|---|
| LMArena Text | 1364 | 1510 |
| LMArena Creative Writing | 1307 | 1507 |
| LMArena Multi-Turn | 1355 | 1492 |
| EQ-Bench Creative Writing | — | 2162 |
Frequently asked questions
Is Amazon Nova Experimental Chat 10 09 better than Claude Fable 5.1?
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 41.9 on the Noometry Index.
Is Amazon Nova Experimental Chat 10 09 or Claude Fable 5.1 better for coding?
Claude Fable 5.1 scores higher on coding benchmarks: 74.7 versus 40.2 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 10 09 and Claude Fable 5.1 share?
9 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 09 has 9 scored results on Noometry and Claude Fable 5.1 has 52.