OpenSIPS 3.0.x is a Stable release. It is recommended for production usage.
OpenSIPS 3.0 Overview - a glimpse in the blueprints of OpenSIPS 3.0 to see what this new release can do for you.
OpenSIPS 3.0.1 is the latest release from the 3.0 branch.
Minor release (see Changelog from 3.0.0)
Release date: 1st of October 2019
Release notes: full technical listing
Release date: 29th of May 2019
Beta-Release date : 16th of April 2019