Oedipus Rex was written in the style of ancient Greek tragedy. This style is characterized by the use of a chorus, which comments on the action of the play and provides a moral perspective. The play also follows the three unities of time, place, and action, meaning that the action takes place in a single location over the course of a single day.

The play reflects the style of ancient Greek tragedy in several ways. For example, the chorus provides commentary on the action of the play and offers a moral perspective. Additionally, the play explores the concept of fate and the tragic consequences of attempting to avoid one's destiny.

While Oedipus Rex is primarily a Greek tragedy, it also has elements of other styles. For example, the play includes elements of a detective story, as Oedipus attempts to uncover the truth about his past. Additionally, the play explores the psychological complexity of its characters, which is a characteristic of modern drama. However, these elements do not detract from the play's overall adherence to the style of ancient Greek tragedy.