Federal Bureau of Prisons spokesman Chris Burke said the musician was released very early in the morning.
T.I., whose real name is Clifford Harris, was arrested in September 2010 in Los Angeles on drug charges. He was sentenced to 11 months in prison for violating the terms of the probation he received after he was convicted of federal firearms charges.
He was released from an Arkansas prison and sent to the halfway house on Aug. 31. He was put back in federal lock-up over a dispute with prison officials, and then returned to the halfway house Sept. 15.
A spokesman for T.I. said the rapper is planning to celebrate his recent birthday and host a private brunch for family and friends in Atlanta on Sunday. He also will attend the BET Hip-Hop Awards on Saturday.