

We choose Weka 3.9 the development version Developer version The package management system requires an internet connection in order to download and install packages. Weka 3.8 and 3.9 feature a package management system that makes it easy for the Weka community to add new functionality to Weka. The stable version receives only bug fixes and feature upgrades that do not break compatibility with its earlier releases, while the development version may receive new features that break compatibility with its earlier releases.

For the bleeding edge, it is also possible to download nightly snapshots of these two versions. New releases of these two versions are normally made once or twice a year. There are two versions of Weka: Weka 3.8 is the latest stable version and Weka 3.9 is the development version.
