Brainiac 5 possesses a Twelfth Level Intellect, which grants him superhuman calculation skills, amazing memory and exceptional technical knowledge. By comparison, 20th century Earth as a whole constitutes a Sixth Level Intellect, and most of his fellow Coluans have an Eighth Level Intellect. 31st century Earth as a whole is a Ninth Level Intellect. His incredible memory allows him to retain knowledge of events that all other characters forget such as the first meeting of the three different Legions.