The dynamic development and expansion of artificial intelligence (AI), one of the most important technologies currently being developed in the world, which may herald the fourth technological revolution, brings not only numerous benefits, but also threats in many spheres of socio-economic life, including law. This breakthrough technology also creates a number of challenges and opportunities for the science and practice of competition law (or antitrust law). The aim of this study is to show the pro- and anticompetitive effects of AI implementation, as well as to identify and outline the key challenges and opportunities that these effects have on competition law. This paper is intended to serve as an introduction to the subject matter. It does not claim to examine it exhaustively, but rather to inspire its further, more extensive and in-depth analysis.