In this regard, Turnitin still reserves its place at number one among the top 10 best plagiarism checkers. Turnitin is always ahead of the game for other players within the plagiarism detection industry. Yes, Turnitin launched their AI detector on 4 th April 2023 after close to two years of development. What is the shortcoming of the Turnitin AI detector?.How do you tell if a paper was written by AI?.How effective is Turnitin AI detection?.