Tizen 1.0 Larkspur has been released at the end of April 2012. It includes source codes of the Tizen software platform as well as SDK. After the first release, we are developing the next versions of Tizen and SDK with new features. In this talk, we will look into the Tizen mobile architecture and its major components with latest updates. As well, features to be newly added in the next version of SDK will be introduced.