Release 24.1.0 is the latest stable release of OpenNMS. It contains a bunch of bug fixes and a few enhancements, including support for OpenTracing in the sink API and a rework of geocoding services.
For a high-level overview of what’s changed in OpenNMS 24, see What’s New in OpenNMS 24.
The codename for 24.1.0 is J.A.R.V.I.S.