Unlike the Gospels, which are classified as ancient biography (bios), the Life of Apollonius is likely a novel or hagiographic fiction. It includes fire-breathing dragons on every hill in India, fish-cows, hobgoblins, and other fantastical content not treated as miraculous but as straightforward description of faraway places.

The Gospels are recognized in New Testament scholarship as ancient biography (bios), a genre focused on carefully portraying a real person's life and character. The Life of Apollonius does not meet this standard — it is more likely a literary novel meant to inspire devotion, as evidenced by its fantastical content, internal contradictions, and the explicit political agenda behind its commissioning.

Earlier 20th-century scholarship (especially the Jesus Seminar) treated the Gospels as myths, but current scholarly consensus has shifted. Graham Stanton (King's College London) and David Aune (Notre Dame) both argue the Gospels fit the genre of Greco-Roman biography (bios), which aimed to faithfully record historical fact even with theological purpose.

Charles Talbert (1977) identified the Gospels as ancient biography; Richard Burridge confirmed it

The scholarly turning point on Gospel genre.