This study investigates the impact of ChatGPT on critical thinking and English language learning in Ukrainian university English departments. Utilizing both qualitative and quantitative methods, the research involved 31 students and three language instructors through surveys and project-based activities. The study found that 62% of students use ChatGPT weekly, highlighting its significant role in their language studies. Participants reported positive impacts on various cognitive and learning skills, particularly in decision-making and analytical thinking. However, ethical and pedagogical concerns, such as the accuracy of AI responses, plagiarism risks, and the potential loss of human interaction, were also significant. The study concludes by recommending a careful integration of AI tools like ChatGPT in language education, emphasizing the need for educators to guide students in responsible and informed use of these technologies. The findings provide valuable insights for educators, curriculum designers, and policymakers, suggesting strategies for effectively integrating ChatGPT in language teaching.This study investigates the impact of ChatGPT on critical thinking and English language learning in Ukrainian university English departments. Utilizing both qualitative and quantitative methods, the research involved 31 students and three language instructors through surveys and project-based activities. The study found that 62% of students use ChatGPT weekly, highlighting its significant role in their language studies. Participants reported positive impacts on various cognitive and learning skills, particularly in decision-making and analytical thinking. However, ethical and pedagogical concerns, such as the accuracy of AI responses, plagiarism risks, and the potential loss of human interaction, were also significant. The study concludes by recommending a careful integration of AI tools like ChatGPT in language education, emphasizing the need for educators to guide students in responsible and informed use of these technologies. The findings provide valuable insights for educators, curriculum designers, and policymakers, suggesting strategies for effectively integrating ChatGPT in language teaching.