The 2.2 metre (7.5 feet) portrait "A.I. God" by "Ai-Da", the world's first ultra-realistic robot artist, smashed pre-sale expectations of $180,000 when it went under the hammer at London auction house Sotheby's Digital Art Sale.

Ai-Da Robot, which uses AI to speak, said: "The key value of my work is its capacity to serve as a catalyst for dialogue about emerging technologies." Ai-Da added that a "portrait of pioneer Alan Turing invites viewers to reflect on the god-like nature of AI and computing while considering the ethical and societal implications of these advancements."

The ultra-realistic robot, one of the most advanced in the world, is designed to resemble a human woman with a face, large eyes and a brown wig. Ai-Da is named after Ada Lovelace, the world's first computer programmer and was devised by Aidan Meller, a specialist in modern and contemporary art.

Ai-Da generates ideas through conversations with members of the studio, and suggested creating an image of Turing during a discussion about "A.I. for good". The robot was then asked what style, colour, content, tone and texture to use, before using cameras in its eyes to look at a picture of Turing and create the painting.