This paper shows empirically the impact of organizational and behavioral determinants on the CEO's investment horizon choice, using artificial intelligence explanatory methods. We apply our approach to 100 Saudi firms. We test the effect of three organizational determinants: ownership concentration, board independence, and CEO remuneration system; and three behavioral determinants: myopia, the locus of control and commitment, on the CEO's investment horizon choice. The study’s key finding is that executives' commitment bias is the most important variable in terms of modal value that affects firms' long-term investment choice. We also find a positive and significant relationship between myopia and long-term investment choice, whereas the lowliest determinant of the horizon choice is the locus of control. More generally, these results show that CEOs who are likely to be the most myopic may display long-term behavior with the existence of high cognitive involvement.