ChatGPT, with its intelligent ability to answer various questions, has generated various responses, including concerns from some parties. However, this technology can be used as a teaching aid for teachers, as long as it is managed well. This research uses a qualitative method with a case study approach, collecting data through interviews, observation and documentation studies. The findings show that the integration of ChatGPT in learning to improve students' critical thinking skills requires planning through teaching modules, classroom organization, collaboration between teachers, as well as motivation and supervision from teachers and school principals. Students experience critical thinking stages starting from identifying ChatGPT answers, identifying problems, exploring further information, confirming with other sources, to formulating conclusions.