Claude Fable 5.1 (Low): benchmark results
Provider: Anthropic. Released 2026-09-01. Access: API.
Unified ELO 1759 ± 1, rank #25 of 3078 rated models, from 13 benchmark results.
Strongest benchmark results
| Benchmark | Score | Metric | Percentile |
|---|---|---|---|
| Conceptual Reasoning Index - Argument Evaluation (LMCA) | 63.46 | Chance-Corrected Score (0-100) | 96 |
| DuelLab Overall | 73.8 | DuelLab Score | 95.5 |
| Conceptual Reasoning Index | 72.27 | Chance-Corrected Score (0-100) | 92.9 |
| Conceptual Reasoning Index - Consistency (ACCoRD) | 80.76 | Chance-Corrected Score (0-100) | 91.8 |
| Epoch AI - Critpt | 27.71 | Score | 90.6 |
| ARC-AGI-2 | 78.33 | Accuracy (%) | 87.9 |
| CursorBench 4.0 | 45.1 | Score (%) | 86.8 |
| Conceptual Reasoning Index - Decision Theory (DTBench) | 90.22 | Chance-Corrected Score (0-100) | 82.6 |
| Bug Hunt Bench - LMS | 16 | Planted Bugs Fixed (out of 60) | 79.1 |
| Bug Hunt Bench | 29 | Planted Bugs Fixed (out of 105) | 78.4 |
| Epoch AI - Cursorbench | 66.2 | Score | 78.1 |
| ARC-AGI-1 | 90 | Accuracy (%) | 76.1 |
Interactive version: theaggregate.ai/model?slug=claude-fable-5-1-low · How It Works · Data refreshed daily, snapshot 2026-09-19.