Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | South Texas Project | Comanche Peak |
|---|---|---|
| Capacity | 2,708.6 MW | 2,430 MW |
| Technology | Nuclear | Nuclear |
| Operator | STP Nuclear Operating Co | Luminant Generation Company LLC |
| Operating units | 2 | 2 |
| Latest 12-month generation | 20.25 TWh | 20.02 TWh |
| Latest complete-year capacity factor | 91.8% (2025) | 93.2% (2025) |
| National technology rank | #5 of 54 | #13 of 54 |
| Latest EIA report | 2026-06 | 2026-06 |