Warden Burl Cain says the 31-year-old rapper—whose real name is Torrence Hatch—left the prison just after 7 p.m. Wednesday.
Cain said Hatch remains on supervised parole until 2018.
Hatch first arrived at Angola in 2009 after pleading guilty to a third-offense marijuana possession charge. Since then, he's faced numerous accusations, including a highly publicized murder trial in the 2009 killing of Terry Boyd. Hatch was acquitted of first-degree murder in Boyd's death in May 2012.
The warden said the time and date of Hatch's release wasn't made public "just to keep everything calm."