Look for LineageOS 12.1, which is based on Android 5.1.1.
The release of Android 5.1.1 Lollipop marked a critical turning point for Google’s mobile operating system. While major version leaps often introduce flashy new features, the 5.1.1 update was primarily a refinement release, designed to stabilize the radical "Material Design" overhaul introduced in early 5.0 versions. Downloading and installing Android 5.1.1 became a rite of passage for users seeking a balance between modern aesthetics and operational stability. download-android-511