Legacy branches of Meteor support these versions. While they do not receive the newest experimental features added to the 1.21 builds, they remain incredibly stable and feature-complete for anarchy servers running on these specific versions. Minecraft 1.16.5 (The Anarchy Standard)
(for 1.21.1+) Download a compatible Baritone JAR and place it in the same mods/ folder. Meteor Client 1.21.1- 1.20.6 -- 1.16.5
: This version is widely used for older anarchy servers. While current official support focuses on newer releases, historical builds for 1.16.5 can be found in the Meteor Client GitHub tags Legacy branches of Meteor support these versions