The artist, whose real name is Clifford Harris, earlier left the Forrest City low-security prison in Arkansas and was driven the 375 or so miles in the bus with dark-colored windows, followed by four other cars.
Dressed in a red and blue striped polo shirt and white shorts, T.I. stepped off the bus with his entourage to check into the halfway house.
"The storm is over & da sun back out. IT'S OUR TIME TO SHINE SHAWTY!!!!!" the rapper posted on Twitter shortly after his release. "Welcome to the beginning of our Happy Ending!!!!"
T.I. had initially served about seven months at the prison in 2009 after he was arrested for trying to buy unregistered guns and silencers from undercover federal agents. He was on probation after he was released and ordered not to commit another crime or to illegally possess any controlled substances.
He was arrested again in September 2010 in Los Angeles on drug charges after authorities said he was found with four ecstasy pills. He was sentenced in October to 11 months in prison for that violation, and had been set for release at the end of September.
It appears a flock of cameras will follow T.I. regardless of where he goes next. VH1 said Wednesday that the network will film T.I.'s journey home from jail and debut the show in December. MTV aired a similar reality show on the rapper in 2009 called "T.I.'s Road to Redemption: 45 Days to Go," which chronicled his attempts to help others avoid his mistakes.
T.I. has also finalized a book deal. A representative from HarperCollins told The Associated Press that T.I. has written a book called "Power & Beauty" that's set to be released in October. The novel, which was co-written with David Ritz, is a fictional tale about two childhood friends torn apart by dangerous dealings on the streets of Atlanta.
The arrest on weapons charges came after Harris' best friend was killed following a post-performance party in Cincinnati in 2006. The rapper has said the bullets that killed his friend were meant for him.
When he was released from that sentence, he was required to perform 1,000 hours of community service, which he spent mostly talking with schoolchildren about the dangers of drugs, gangs and violence.
But a federal judge said that "experiment" failed when Los Angeles deputies found four ecstasy pills on the rapper.
Bluestein can be reached at http://www.twitter.com/bluestein. Associated Press writers Nomaan Merchant in Little Rock, Ark., Mesfin Fekadu in New York and Jonathan Landrum Jr. in Atlanta contributed to this report.