Savant is advanced antenna performance simulation software, providing fast and accurate prediction of installed antenna patterns, near-fields and antenna-to-antenna coupling on electrically large platforms through an intuitive and powerful user interface. The Savant v4.0 is the new version which includes a number of new features - CST integration, streamlined workflow, direct import of full wave EM antenna models, and new acceleration features. The 4.0 version has improved GPU performance and multi-threaded PTD wedge computations.