According to PANews, ChatGPT's "mentions" feature has been launched on Android and MacOS platforms, but iOS users are not yet able to use this feature.

On Android devices, when users enter the "@" character, a window will pop up to select different GPT models, enabling seamless switching and keeping the chat context consistent.

This feature has been launched on the web before, but the mobile platform was launched later. In addition, after the latest MacOS ChatGPT update, the desktop client also supports this feature.