According to transfermarkt.com, the Argentina-born Italian striker's loan spell lasts until the end of June 2015, at which point Inter will have the option to sign him on a more permanent basis.
Though owned by Southampton, Osvaldo spent the second half of last season at Juventus on loan, where he struggled for playing time. As a result, he missed out on selection for Italy's World Cup campaign.
He will be hoping that he can reignite his career at Internazionale.
Here are five things to expect from him with the Italian giants.