This study aims to discover the best appropriate model to explain reading success of academically gifted students through the ecological model. Three models (i.e., Model 1, Model 2, and Model 3) were created by using three layers of the ecological model to investigate the ecological background of reading success. In line with the literature, seven explanatory factors were examined among the items in the student questionnaire of PISA 2018. Exploratory factor analysis to detect factors and confirmatory factor analysis to validate them were used respectively. Cronbach's Alpha values of each factor (internal consistency) were also calculated. Structural equation modeling was performed to create a model explaining reading success. Afterward, indices of goodness-fit-criteria were examined. The findings indicated that there is a complex background for reading. All factors (i.e., perception of difficulties, perception of competence in reading, enjoyment of reading, teacher support, teacher feedback, value of school and disciplinary climate in the classroom) have a significant effect on reading. According to the results, Model 3 has the best model fit indices among other models. This model, having more complexity and interaction among latent variables, was found as the most comprehensive and appropriate model due to being coherent with the ecological model.