Objective: To compare the weight and insulin-like growth factor-1 in neonatal retinopathy (WINROP) to the growth and retinopathy of prematurity (G-ROP) model in a Portuguese cohort. Design: Retrospective case series. Methods: Clinical records of consecutive infants who underwent retinopathy of prematurity (ROP) screening from April 2012 to May 2019 were retrospectively reviewed. Both WINROP and G-ROP models were accessed for sensitivity and specificity for type 1 ROP. A separate analysis of both algorithms was performed in infants with gestational age (GA) <30 weeks. Results: Of the 375 infants included in the study, 313 were eligible for G-ROP analysis and 311 for WINROP. In the G-ROP group, 22 infants developed type 1 ROP (sensitivity 90.91%, 95% confidence interval [CI] 70.84%–98.98%). In the WINROP group, 23 infants needed treatment (sensitivity of 86.96%, 95% CI 66.41%–97.22%). Both models reached 100% sensitivity for type 1 ROP if restricted to GA <30 weeks. Conclusions: Both models were easy to use and had similar sensitivities. If restricted to GA <30 weeks, both models detected all type 1 ROP.