: In the Fourth Industrial Revolution, journalism cannot remain oblivious to the innovations brought about by the socio-technological reality. Artificial intelligence (AI) is one of the technologies on the rise, although the Spanish media have incorporated it little, experimentally and in specific sections. This research has two objectives: 1) to know the state of development of AI in the Spanish digital media and the industry's perception of the impact of this technology on the profession; 2) to explore a human vs synthetic text generation detection method to assess whether generative AI is being used in media. A comparative study was carried out between two media of reference in Spain, one matrix and conservative ideology (El Mundo), and another digital native and progressive trend (eldiario.es). The methodology was based on methodological triangulation and included a survey and an exp...