This study examines the frequency of GenAI usage among university students, highlighting cross-country differences across Poland, the United States, the United Kingdom, and Turkey. It focuses on five key activities: thesis writing, coursework, homework and academic projects, self-study within the formal educational scope, and self-education beyond formal education. Based on survey data from 578 students, the study employed the Kruskal-Wallis, Mann-Whitney U, and Dunn’s tests to analyze variations in usage patterns. The results confirmed all proposed hypotheses, demonstrating significant differences in GenAI usage frequency across countries. GenAI usage was lowest in the United Kingdom and highest in Turkey, while Poland and the United States exhibited similar moderate to frequent usage patterns. This study offers valuable insights into the increasing role of GenAI in university education and underscores the importance of understanding cultural and educational contexts in shaping GenAI usage.