Claude Opus 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.
- Federal refundable credits100.0%3.7%
- Local income tax100.0%0.3%
- Person-level Early Head Start eligibility100.0%3.1%
- Person-level Head Start eligibility100.0%1.2%
- Person-level Medicare eligibility100.0%11%
- Person-level WIC eligibility100.0%0.3%
- Self-employment tax100.0%2.1%
- SSI100.0%2.0%
- TANF99.0%0.3%
- Free school meals eligibility98.0%0.7%
- Reduced-price school meals eligibility98.0%0.1%
- Person-level Medicaid eligibility97.1%30%
- Person-level CHIP eligibility96.0%0.2%
- Payroll tax92.9%16%
- State refundable credits90.8%0.6%
- SNAP89.2%4.1%
- State tax before refundable credits80.2%6.0%
- Federal tax before refundable credits80.0%19%
Table view (exact, within 1%, outputs), hardest first
| Program | Exact | Within 1% | n |
|---|---|---|---|
| Federal tax before refundable credits | 80.0% | 84.7% | 85 |
| State tax before refundable credits | 80.2% | 83.7% | 86 |
| SNAP | 89.2% | 91.4% | 93 |
| State refundable credits | 90.8% | 90.8% | 98 |
| Payroll tax | 92.9% | 94.9% | 99 |
| Person-level CHIP eligibility | 96.0% | 96.0% | 177 |
| Person-level Medicaid eligibility | 97.1% | 97.1% | 174 |
| Free school meals eligibility | 98.0% | 98.0% | 100 |
| Reduced-price school meals eligibility | 98.0% | 98.0% | 100 |
| TANF | 99.0% | 100.0% | 100 |
| Federal refundable credits | 100.0% | 100.0% | 98 |
| 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 |
| 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
- SNAP319% offReference $288 · predicted $1,208Inspect household #030
- Federal tax before refundable credits123% offReference $5,200 · predicted $11,600Inspect household #123
- Federal tax before refundable credits100% offReference $643 · predicted $0Inspect household #023
- SNAP100% offReference $288 · predicted $0Inspect household #027
- State refundable credits100% offReference $40 · predicted $0Inspect household #029
- State refundable credits100% offReference $19 · predicted $0Inspect household #043
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 7,583 rows whose legacy threshold score is below 1. That universe contains 7,579 of 7,579 exact-match misses and 4 exact hits. Another 1,843 rows with bounded score below 100 were not selected and have no audit annotation.