Model comparison
Claude Fable 5.1 vs Nova Premier 1.0
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 38.3 on the Noometry Index. Nova Premier 1.0 costs 4.0× less per token, which makes it the better buy when Claude Fable 5.1's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in math, where Claude Fable 5.1 leads 89.6 to 33.8.
- Nova Premier 1.0 is cheaper at $2.50 / $12.50 per million input/output tokens, against $10 / $50 for Claude Fable 5.1.
Side by side
| Claude Fable 5.1 | Nova Premier 1.0 | |
|---|---|---|
| Provider | Anthropic | Amazon |
| Noometry Index | 69.0 | 38.3 |
| Released | 2026-09-01 | 2025-04-30 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 1M |
| Max output | 128K | 10K |
| Input $ / M tokens | $10 | $2.50 |
| Output $ / M tokens | $50 | $12.50 |
| Results tracked | 52 | 6 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Not comparable
Claude Fable 5.1: 74.7 (#1), Nova Premier 1.0: —
| Benchmark | Claude Fable 5.1 | Nova Premier 1.0 |
|---|---|---|
| FrontierCode | 50.9% | — |
| CursorBench | 51.8% | — |
| LMArena WebDev | 1744 | — |
| FrontierSWE | 56.3% | — |
| SciCode | 63.1% | — |
| GSO | 88.2% | — |
| WeirdML | 92.9% | — |
| LMArena Coding | 1528 | — |
| MirrorCode | 73.3% | — |
| ALE-Bench | 2,143 | — |
Agentic & Tool Use Not comparable
Claude Fable 5.1: 50.7 (#5), Nova Premier 1.0: —
| Benchmark | Claude Fable 5.1 | Nova Premier 1.0 |
|---|---|---|
| APEX-Agents | 68.6% | — |
| Remote Labor Index | 17.9% | — |
| GDP.pdf | 29.6% | — |
| Vending-Bench 2 | 5,422 | — |
Reasoning Claude Fable 5.1 leads
Claude Fable 5.1: 76.7 (#7), Nova Premier 1.0: 23.0 (#185)
| Benchmark | Claude Fable 5.1 | Nova Premier 1.0 |
|---|---|---|
| ARC-AGI-2 | 90% | — |
| Kagi LLM Benchmark | — | 44.8% |
| NYT Connections (extended) | 90% | — |
| ARC-AGI-1 | 97.5% | — |
| CritPt | 31.1% | — |
| Chess Puzzles | 47% | — |
| EBR-Bench | 57.1% | — |
| LMArena Hard Prompts | 1526 | — |
| Mystery Game Puzzles | 58% | — |
| DTBench | 97.6% | — |
| LMCA | 65.5% | — |
| Epoch Capabilities Index | 164.7 | — |
Math Claude Fable 5.1 leads
Claude Fable 5.1: 89.6 (#4), Nova Premier 1.0: 33.8 (#199)
| Benchmark | Claude Fable 5.1 | Nova Premier 1.0 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 90.2% | — |
| FrontierMath Tier 4 | 87.8% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| Omni-MATH | — | 35% |
| LMArena Math | 1525 | — |
| FrontierMath Erdős | 0% | — |
Knowledge Claude Fable 5.1 leads
Claude Fable 5.1: 69.6 (#6), Nova Premier 1.0: 35.8 (#180)
| Benchmark | Claude Fable 5.1 | Nova Premier 1.0 |
|---|---|---|
| Humanity's Last Exam | 46.5% | — |
| SimpleQA Verified | 70.8% | — |
| MMLU-Pro | — | 72.6% |
| GPQA (HELM) | — | 51.8% |
| LMArena Expert | 1535 | — |
Multimodal Not comparable
Claude Fable 5.1: 53.9 (#4), Nova Premier 1.0: —
| Benchmark | Claude Fable 5.1 | Nova Premier 1.0 |
|---|---|---|
| LMArena Vision | 1318 | — |
| Blueprint-Bench 2 | 41.9% | — |
| Furniture Assembly | 70% | — |
| LMArena Document | 1513 | — |
Multilingual Not comparable
Claude Fable 5.1: 59.1 (#3), Nova Premier 1.0: —
| Benchmark | Claude Fable 5.1 | Nova Premier 1.0 |
|---|---|---|
| LMArena Non-English | 1507 | — |
| LMArena Chinese | 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
Claude Fable 5.1: 79.2 (#6), Nova Premier 1.0: 66.8 (#204)
| Benchmark | Claude Fable 5.1 | Nova Premier 1.0 |
|---|---|---|
| IFEval | — | 80.3% |
| LMArena Instruction Following | 1517 | — |
Long Context Not comparable
Claude Fable 5.1: 46.7 (#20), Nova Premier 1.0: —
| Benchmark | Claude Fable 5.1 | Nova Premier 1.0 |
|---|---|---|
| LMArena Longer Query | 1522 | — |
Writing & Preference Claude Fable 5.1 leads
Claude Fable 5.1: 79.2 (#2), Nova Premier 1.0: 51.0 (#178)
| Benchmark | Claude Fable 5.1 | Nova Premier 1.0 |
|---|---|---|
| LMArena Text | 1510 | — |
| LMArena Creative Writing | 1507 | — |
| EQ-Bench Creative Writing | 2162 | — |
| WildBench | — | 78.8% |
| LMArena Multi-Turn | 1492 | — |
Frequently asked questions
Is Claude Fable 5.1 better than Nova Premier 1.0?
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 38.3 on the Noometry Index. Nova Premier 1.0 costs 4.0× 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, Claude Fable 5.1 or Nova Premier 1.0?
Nova Premier 1.0 is cheaper. It lists at $2.50 per million input tokens and $12.50 per million output tokens; Claude Fable 5.1 lists at $10 and $50.
Which has the bigger context window?
Both accept 1M tokens.
How many benchmarks do Claude Fable 5.1 and Nova Premier 1.0 share?
0 benchmarks have published results for both models. Claude Fable 5.1 has 52 scored results on Noometry and Nova Premier 1.0 has 6.