GPT-5.6 Terra
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 CHIP eligibility100.0%0.2%
- 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 eligibility99.4%0.3%
- Self-employment tax99.0%2.1%
- TANF99.0%0.3%
- Free school meals eligibility98.0%0.7%
- Reduced-price school meals eligibility98.0%0.1%
- SSI96.9%2.0%
- Person-level Medicaid eligibility92.5%30%
- Federal refundable credits90.8%3.7%
- Payroll tax87.4%16%
- SNAP87.1%4.1%
- State refundable credits80.6%0.6%
- Federal tax before refundable credits75.9%19%
- State tax before refundable credits68.2%6.0%
Table view (exact, within 1%, outputs), hardest first
| Program | Exact | Within 1% | n |
|---|---|---|---|
| State tax before refundable credits | 68.2% | 71.8% | 85 |
| Federal tax before refundable credits | 75.9% | 79.7% | 79 |
| State refundable credits | 80.6% | 80.6% | 98 |
| SNAP | 87.1% | 90.3% | 93 |
| Payroll tax | 87.4% | 89.5% | 95 |
| Federal refundable credits | 90.8% | 91.8% | 98 |
| Person-level Medicaid eligibility | 92.5% | 92.5% | 173 |
| SSI | 96.9% | 97.9% | 97 |
| Free school meals eligibility | 98.0% | 98.0% | 100 |
| Reduced-price school meals eligibility | 98.0% | 98.0% | 100 |
| Self-employment tax | 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 CHIP eligibility | 100.0% | 100.0% | 177 |
| 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 |
Hardest casesworst misses on positive references
- Federal tax before refundable credits671% offReference $1,910 · predicted $14,728Inspect household #068
- State tax before refundable credits280% offReference $1,255 · predicted $4,764Inspect household #068
- State tax before refundable credits157% offReference $1,026 · predicted $2,640Inspect household #122
- Federal tax before refundable credits149% offReference $5,200 · predicted $12,928Inspect household #123
- State refundable credits100% offReference $155 · predicted $0Inspect household #007
- SNAP100% offReference $240 · 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 7,527 rows whose legacy threshold score is below 1. That universe contains 7,523 of 7,523 exact-match misses and 4 exact hits. Another 2,072 rows with bounded score below 100 were not selected and have no audit annotation.