Model comparison
Amazon Nova Pro vs Claude Fable 5.1
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 31.0 on the Noometry Index. Amazon Nova Pro costs 14× less per token, which makes it the better buy when Claude Fable 5.1's lead doesn't matter for your workload.
Last verified . 20 shared benchmarks.
Summary
- They share 20 benchmarks with published results for both. Amazon Nova Pro scores higher in 0 categories and Claude Fable 5.1 in 10 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Fable 5.1 leads 89.6 to 28.5.
- The biggest single-benchmark swing is Humanity's Last Exam: 4.4% for Amazon Nova Pro and 46.5% for Claude Fable 5.1.
- Amazon Nova Pro is cheaper at $0.80 / $3.20 per million input/output tokens, against $10 / $50 for Claude Fable 5.1.
- Claude Fable 5.1 accepts more context: 1M tokens versus 300K.
Side by side
| Amazon Nova Pro | Claude Fable 5.1 | |
|---|---|---|
| Provider | Amazon | Anthropic |
| Noometry Index | 31.0 | 69.0 |
| Released | 2024-12-03 | 2026-09-01 |
| Weights | Proprietary | Proprietary |
| Context window | 300K | 1M |
| Max output | 10K | 128K |
| Input $ / M tokens | $0.80 | $10 |
| Output $ / M tokens | $3.20 | $50 |
| Results tracked | 38 | 52 |
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Category by category
Coding Claude Fable 5.1 leads
Amazon Nova Pro: 35.1 (#229), Claude Fable 5.1: 74.7 (#1)
| Benchmark | Amazon Nova Pro | Claude Fable 5.1 |
|---|---|---|
| LMArena Coding | 1270 | 1528 |
| FrontierCode | — | 50.9% |
| CursorBench | — | 51.8% |
| LMArena WebDev | — | 1744 |
| FrontierSWE | — | 56.3% |
| SciCode | — | 63.1% |
| GSO | — | 88.2% |
| WeirdML | — | 92.9% |
| LiveBench Coding | 38.1% | — |
| MirrorCode | — | 73.3% |
| ALE-Bench | — | 2,143 |
Agentic & Tool Use Claude Fable 5.1 leads
Amazon Nova Pro: 16.7 (#147), Claude Fable 5.1: 50.7 (#5)
| Benchmark | Amazon Nova Pro | Claude Fable 5.1 |
|---|---|---|
| APEX-Agents | — | 68.6% |
| Berkeley Function Calling Leaderboard | 25% | — |
| Remote Labor Index | — | 17.9% |
| TheAgentCompany | 1.7% | — |
| GDP.pdf | — | 29.6% |
| Vending-Bench 2 | — | 5,422 |
Reasoning Claude Fable 5.1 leads
Amazon Nova Pro: 20.0 (#243), Claude Fable 5.1: 76.7 (#7)
| Benchmark | Amazon Nova Pro | Claude Fable 5.1 |
|---|---|---|
| LMArena Hard Prompts | 1246 | 1526 |
| Epoch Capabilities Index | 123.8 | 164.7 |
| ARC-AGI-2 | — | 90% |
| NYT Connections (extended) | — | 90% |
| ARC-AGI-1 | — | 97.5% |
| CritPt | — | 31.1% |
| Chess Puzzles | — | 47% |
| EBR-Bench | — | 57.1% |
| LiveBench Reasoning | 32.6% | — |
| Mystery Game Puzzles | — | 58% |
| DTBench | — | 97.6% |
| LiveBench Data Analysis | 48.3% | — |
| LMCA | — | 65.5% |
| LiveBench | 43.5% | — |
Math Claude Fable 5.1 leads
Amazon Nova Pro: 28.5 (#243), Claude Fable 5.1: 89.6 (#4)
| Benchmark | Amazon Nova Pro | Claude Fable 5.1 |
|---|---|---|
| LMArena Math | 1252 | 1525 |
| FrontierMath (Tiers 1-3) | — | 90.2% |
| FrontierMath Tier 4 | — | 87.8% |
| OTIS Mock AIME 2024-2025 | — | 100% |
| ProofBench | — | 100% |
| Omni-MATH | 24.2% | — |
| LiveBench Math | 38% | — |
| FrontierMath Erdős | — | 0% |
Knowledge Claude Fable 5.1 leads
Amazon Nova Pro: 27.4 (#250), Claude Fable 5.1: 69.6 (#6)
| Benchmark | Amazon Nova Pro | Claude Fable 5.1 |
|---|---|---|
| Humanity's Last Exam | 4.4% | 46.5% |
| LMArena Expert | 1211 | 1535 |
| SimpleQA Verified | — | 70.8% |
| MMLU-Pro | 67.3% | — |
| Confabulations | 30.1% | — |
| Vectara Hallucination Rate | 5.1% | — |
| GPQA (HELM) | 44.6% | — |
| MMLU | 82% | — |
Multimodal Claude Fable 5.1 leads
Amazon Nova Pro: 25.0 (#126), Claude Fable 5.1: 53.9 (#4)
| Benchmark | Amazon Nova Pro | Claude Fable 5.1 |
|---|---|---|
| LMArena Vision | 980 | 1318 |
| Blueprint-Bench 2 | — | 41.9% |
| Furniture Assembly | — | 70% |
| LMArena Document | — | 1513 |
Multilingual Claude Fable 5.1 leads
Amazon Nova Pro: 39.7 (#223), Claude Fable 5.1: 59.1 (#3)
| Benchmark | Amazon Nova Pro | Claude Fable 5.1 |
|---|---|---|
| LMArena Non-English | 1234 | 1507 |
| LMArena Chinese | 1244 | 1586 |
| LMArena French | 1271 | 1525 |
| LMArena German | 1243 | 1500 |
| LMArena Japanese | 1200 | 1543 |
| LMArena Korean | 1203 | 1534 |
| LMArena Russian | 1240 | 1521 |
| LMArena Spanish | 1182 | 1516 |
Instruction Following Claude Fable 5.1 leads
Amazon Nova Pro: 64.9 (#226), Claude Fable 5.1: 79.2 (#6)
| Benchmark | Amazon Nova Pro | Claude Fable 5.1 |
|---|---|---|
| LMArena Instruction Following | 1235 | 1517 |
| LiveBench Instruction Following | 67.1% | — |
| IFEval | 81.5% | — |
Long Context Claude Fable 5.1 leads
Amazon Nova Pro: 38.1 (#205), Claude Fable 5.1: 46.7 (#20)
| Benchmark | Amazon Nova Pro | Claude Fable 5.1 |
|---|---|---|
| LMArena Longer Query | 1255 | 1522 |
Writing & Preference Claude Fable 5.1 leads
Amazon Nova Pro: 43.9 (#226), Claude Fable 5.1: 79.2 (#2)
| Benchmark | Amazon Nova Pro | Claude Fable 5.1 |
|---|---|---|
| LMArena Text | 1259 | 1510 |
| LMArena Creative Writing | 1212 | 1507 |
| LMArena Multi-Turn | 1246 | 1492 |
| Short-Story Creative Writing | 60.5% | — |
| EQ-Bench Creative Writing | — | 2162 |
| WildBench | 77.7% | — |
| LiveBench Language | 37% | — |
Frequently asked questions
Is Amazon Nova Pro better than Claude Fable 5.1?
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 31.0 on the Noometry Index. Amazon Nova Pro costs 14× less per token, which makes it the better buy when Claude Fable 5.1's lead doesn't matter for your workload.
Which is cheaper, Amazon Nova Pro or Claude Fable 5.1?
Amazon Nova Pro is cheaper. It lists at $0.80 per million input tokens and $3.20 per million output tokens; Claude Fable 5.1 lists at $10 and $50.
Is Amazon Nova Pro or Claude Fable 5.1 better for coding?
Claude Fable 5.1 scores higher on coding benchmarks: 74.7 versus 35.1 in the Noometry coding category.
Which has the bigger context window?
Claude Fable 5.1 does, with 1M tokens against 300K.
How many benchmarks do Amazon Nova Pro and Claude Fable 5.1 share?
20 benchmarks have published results for both models. Amazon Nova Pro has 38 scored results on Noometry and Claude Fable 5.1 has 52.