The widespread use of Artificial Intelligence (AI) in language education contexts has motivated several scholars around the world to uncover the advantages and disadvantages of AI and AI-powered instruments in different language classrooms. Yet, as the review of earlier investigations revealed, few inquiries have been carried out to divulge the pros and cons of leveraging AI in EFL classes. To narrow this gap, using the phenomenological approach, this inquiry investigated the opportunities and challenges of implementing AI in EFL classes from the perspective of Chinese EFL students. To do so, through the criterion sampling technique, a total of 45 EFL students was recruited from different educational institutions in China. To collect the dataset, participants were asked to complete an open-ended questionnaire. For the sake of triangulation, among the 45 participants, 15 were randomly selected to engage in a follow-up interview session. With the aid of MAXQDA software (version 2023), participants’ perceptions of AI opportunities and challenges were carefully analyzed. Overall, the analysis findings uncovered that leveraging AI in EFL classes can bring numerous opportunities for EFL students, including individualized learning, timely and immediate feedback, rich educational resources, and an interactive learning atmosphere. However, as demonstrated by the analysis outcomes, implementing AI in EFL courses may also face students with a range of challenges and problems. The research outcomes would be of great help to teachers and educational leaders in mitigating the challenges of leveraging AI in language classrooms. •Investigated AI opportunities and challenges in EFL classes from Chinese students' perspective.•Found that AI can bring numerous opportunities for EFL students.•Revealed that AI implementation in EFL courses poses serious challenges for students.