The project-based learning model via generative artificial intelligence, or PjBL model via Gen-AI, is a research tool that was initiated based on the concept of project-based learning management focusing mainly on self-directed learning, in which learners are able to learn and practice through the projects they are interested in as to their aptitudes and competencies with the aid of generative artificial intelligence technology. The learning model developed in this study can be employed as a guideline for the instruction management designated specifically to promote programming skills. This study is intended to develop the PjBL model via Gen-AI as a guideline to further develop the PjBL system via Gen-AI to promote programming skills for vocational students. The suitability of the PjBL model via Gen-AI was assessed by nine experts from various educational institutions. The study results insist that the PjBL model via Gen-AI is suitability is at the highest level. According to the research results, it can be summarized that the PjBL model via Gen-AI can be used as a guideline to further develop the project-based learning systems via generative artificial intelligence to promote programming skills for vocational students in Thailand.