Meteor Client 1.21.1- 1.20.6 -- 1.16.5 May 2026

Meteor Client is one of the most prominent open-source utility mods for Minecraft Java Edition, primarily known for anarchy server gameplay (e.g., 2b2t.org). Unlike many clients that drop support for older versions rapidly, Meteor maintains an unusually wide version compatibility window—from 1.21.1 back to 1.16.5 . This write-up explores what that range means technically, the feature set available across versions, and the practical trade-offs for users. 1. Version Coverage Breakdown | Minecraft Version | Meteor Build Stage | Key API Changes Accommodated | |------------------|-------------------|------------------------------| | 1.21.1 | Current stable | 1.21 combat changes, new blocks (Trial Chambers, Tuff variants) | | 1.20.6 – 1.20.4 | Recent legacy | 1.20.5/6 data component system (items), armor trim predicates | | 1.19.4 – 1.19.2 | Older stable | World generation changes (deep dark, ancient cities) | | 1.18.2 | Legacy support | World height increase (-64 to 320) | | 1.17.1 | Maintenance | Caves & Cliffs part 1 (new block types, height preparation) | | 1.16.5 | Long-term legacy | Nether update biomes (warped/crimson forests, bastions) |