PolicyBench
Claude Fable 5
Anthropic · AI alone, no tools
United States rank
#5 of 23
US exact
79.9%
United States
United States benchmark
Exact match
79.9%
Bounded score
91.5%
Parse rate
100.0%
Eligibility flags
949/984
Score by programhardest first
| Program | Exact | Within 1% | n |
|---|---|---|---|
| Federal tax before refundable credits | 52.0% | 54.0% | 100 |
| State tax before refundable credits | 55.0% | 56.0% | 100 |
| SNAP | 77.0% | 78.0% | 100 |
| State refundable credits | 80.0% | 80.0% | 100 |
| Payroll tax | 82.0% | 83.0% | 100 |
| Federal refundable credits | 86.0% | 89.0% | 100 |
| Person-level Medicare eligibility | 88.7% | 88.7% | 177 |
| Person-level Medicaid eligibility | 93.8% | 93.8% | 177 |
| SSI | 96.0% | 96.0% | 100 |
| Self-employment tax | 97.0% | 99.0% | 100 |
| Person-level CHIP eligibility | 98.9% | 98.9% | 177 |
| Free school meals eligibility | 99.0% | 99.0% | 100 |
| TANF | 99.0% | 99.0% | 100 |
| Person-level WIC eligibility | 99.4% | 99.4% | 177 |
| Local income tax | 100.0% | 100.0% | 100 |
| Person-level Early Head Start eligibility | 100.0% | 100.0% | 38 |
| Person-level Head Start eligibility | 100.0% | 100.0% | 38 |
| Reduced-price school meals eligibility | 100.0% | 100.0% | 100 |
Hardest casesworst misses on positive references
- SNAP753% offReference $461 · predicted $3,936Inspect household #023
- Federal tax before refundable credits593% offReference $500 · predicted $3,465Inspect household #046
- Federal tax before refundable credits332% offReference $1,910 · predicted $8,258Inspect household #068
- State tax before refundable credits326% offReference $514 · predicted $2,192Inspect household #039
- State tax before refundable credits266% offReference $1,253 · predicted $4,580Inspect household #068
- State tax before refundable credits235% offReference $285 · predicted $953Inspect household #042
Scores are from the frozen manuscript snapshot under the AI-alone condition: one structured response per household, no tools, graded against PolicyEngine reference outputs. See the leaderboard and paper for methodology.