Continuity mistake: When Basquiat is painting on a sign with a horse on it, he puts a white line through the horse. When Warhol has a look at it, the stripe no longer covers the horse.
Factual error: Gina is drinking from a 90's Diet Pepsi can when she goes to Basquiat's studio for the meeting with Cynthia and Tom, and of course the film is set in the 80's.
Factual error: Although many thing have been changed to reflect the early-mid 80's when the film is set, it is often possible to see 90's cars in several scenes.
Continuity mistake: When Basquiat is doing the large painting on the floor, part of the work in the top left hand corner disappears and reappears between cuts.
Continuity mistake: Rene and Basquiat are in the studio, Basquiat asks Rene what time is it and draws in chalk "Rene 5:11" on the canvas. But before this scene, Rene walks past the canvas where the quote is going to be written, and it's already there.