Benmosche, originally scheduled to retire in 2015, was diagnosed with cancer in 2010. He learnt in May that he had nine months to a year to live.

He wants to enjoy the time he is left with after outliving earlier prognoses and repaying the insurer's $182.3 billion U.S. bailout, Benmosche told Bloomberg TV.

"You know what, I'm not going to play the odds" Benmosche said at his villa in Croatia. "So let's accelerate my retirement. And the board was happy to do that"

AIG could not immediately confirm the news.

The company said in June that Peter Hancock would succeed Benmosche as CEO and president, effective Sept. 1. Hancock joined AIG in 2010 and has headed the company's property-casualty business since March 2011.

(Reporting by Avik Das in Bangalore; Editing by Joyjeet Das)