Claude Sonnet 5.5
United States benchmark
Exact match by programall 18 output groups, best first
Bar length is the unweighted exact-match rate on that program's outputs; the right column is the program's share of the headline weight, which follows household dollars, so the bars do not average to the headline.
- Local income tax100.0%0.3%
- Person-level Early Head Start eligibility100.0%3.1%
- Person-level Medicare eligibility100.0%11%
- Person-level WIC eligibility100.0%0.3%
- Self-employment tax100.0%2.1%
- SSI100.0%2.0%
- Reduced-price school meals eligibility99.0%0.1%
- TANF99.0%0.3%
- Free school meals eligibility98.0%0.7%
- Federal refundable credits98.0%3.7%
- Person-level Head Start eligibility97.4%1.2%
- Person-level CHIP eligibility96.6%0.2%
- Person-level Medicaid eligibility96.5%30%
- Payroll tax92.9%16%
- SNAP86.0%4.1%
- Federal tax before refundable credits80.5%19%
- State refundable credits79.6%0.6%
- State tax before refundable credits72.1%6.0%
Table view (exact, within 1%, outputs), hardest first
| Program | Exact | Within 1% | n |
|---|---|---|---|
| State tax before refundable credits | 72.1% | 74.4% | 86 |
| State refundable credits | 79.6% | 79.6% | 98 |
| Federal tax before refundable credits | 80.5% | 82.9% | 82 |
| SNAP | 86.0% | 90.3% | 93 |
| Payroll tax | 92.9% | 94.9% | 99 |
| Person-level Medicaid eligibility | 96.5% | 96.5% | 173 |
| Person-level CHIP eligibility | 96.6% | 96.6% | 177 |
| Person-level Head Start eligibility | 97.4% | 97.4% | 38 |
| Federal refundable credits | 98.0% | 98.0% | 98 |
| Free school meals eligibility | 98.0% | 98.0% | 100 |
| Reduced-price school meals eligibility | 99.0% | 99.0% | 100 |
| TANF | 99.0% | 99.0% | 100 |
| Local income tax | 100.0% | 100.0% | 100 |
| Person-level Early Head Start eligibility | 100.0% | 100.0% | 38 |
| Person-level Medicare eligibility | 100.0% | 100.0% | 172 |
| Person-level WIC eligibility | 100.0% | 100.0% | 177 |
| Self-employment tax | 100.0% | 100.0% | 100 |
| SSI | 100.0% | 100.0% | 97 |
Hardest casesworst misses on positive references
- State refundable credits900% offReference $366 · predicted $3,658Inspect household #038
- State tax before refundable credits487% offReference $13 · predicted $75Inspect household #023
- SNAP319% offReference $288 · predicted $1,208Inspect household #030
- SNAP116% offReference $2,376 · predicted $5,130Inspect household #079
- SNAP100% offReference $240 · predicted $0Inspect household #013
- State refundable credits100% offReference $25 · predicted $0Inspect household #013
Scores are from the frozen manuscript snapshot under the AI-alone condition: structured responses over the same household facts (whole-scenario or in output subsets, per the serving-configuration table), no tools, graded against PolicyEngine reference outputs. See the leaderboard and paper for methodology. The frozen US annotations cover 7,772 rows whose legacy threshold score is below 1. That universe contains 7,768 of 7,768 exact-match misses and 4 exact hits. Another 2,027 rows with bounded score below 100 were not selected and have no audit annotation.