The Broad Institute of MIT and Harvard will release version 4 of the industry-leading Genome Analysis Toolkit under an open source software license. The software package, designated GATK4, contains new tools and rebuilt architecture. It is available currently as an alpha preview on the Broad Institute’s GATK website, with a beta release expected in mid-June. Broad engineers announced the upgrade, as well as the decision to release the tool as an open source product, at Bio-IT World today.