Elon Musk reportedly claimed that ex-partner Grimes (real name: Claire Elise Boucher) was a "simulation" created in his brain.
In the new BBC docuseries The Elon Musk Show, US author and journalist Devin Gordon told the team that Grimes had "repeatedly" said to him that the Tesla CEO thought she was "not real".
"She told me repeatedly that Musk has this theory of her that she’s not real - that she’s a simulation who was created by him and exists in his cerebral cortex as sort of the perfect companion to him," Gordon said.
"Which sounds a little crazy and maybe even a little creepy, except she agrees with it. She said she does feel like this simulation who was perfectly created for him."
Devin continued that the pair "both made a similar nerdy joke about a scary AI theory of the future", and that her "interests are all the same as his and her music is very technologically oriented."