The "vst vst3 aax x64" portion of the keyword specifies the supported environments for this version:
The dual-mode interface allows for both real-time, "set-it-and-forget-it" pitch correction (Auto Mode) and surgical, manual note-by-note editing (Graph Mode).
Auto-Tune Pro 9.1.0 introduced several workflow improvements and technical features that cemented its place as the industry standard for vocal production: