The beta version of Spine does not have a strict time limit. The duration of the beta period depends on the development progress and the stability of the features being tested. The goal is to ensure that the beta version is stable and that all official runtimes support the skeleton data exported from the beta before it is released as a non-beta version. Users can opt-in to use the beta version through the Spine settings and provide feedback during this period.

Pamela As Spinebot already answered, there is no exact time limit. However, the beta editor will not be available for download after the official release.