Nurses must excel in using Artificial Intelligence (AI) - applied hospital systems, making their informatics competency crucial. ChatGPT has been trained with extensive amounts of informatics- and technology-related health data and has gained popularity. Nurses could have the opportunity to enhance their informatics competency through the knowledge generated by ChatGPT. However, its informatics competency has not been evaluated. We used the Self-Assessment of Informatics Competency Scale to measure the level of informatics competency of ChatGPT. ChatGPT fell within the range of ‘somewhat competent’ and ‘competent,’ lower than that of students in graduate programs. One subdomain, applied computer skills (clinical informatics), demonstrated competency levels close to that of students. Although the results presented certain limitations and concerns, we recognize the potential of ChatGPT to help researchers and healthcare practitioners. Nursing is advancing and continuously integrating AI technology; therefore, we should now embrace both the benefits and risks associated with ChatGPT.