The maximum number of WhatsApp group participants appears to be increasing steadily. What was previously doubled from 256 to 512 participants seems to be getting another increase up to 1024 participants.
With the increased group size limit, WhatsApp now aims to provide a more similar experience to Discord or Telegram groups. Even though Discord supports 500,000 users per server and Telegram supports 200,000 users per group. There is still much to be done.
According to WABetaInfo, this feature is available on WhatsApp beta for Android and iOS, but it is limited to an unspecified number of beta testers. If you want to check if the feature is available for your WhatsApp account, just try to create a group or add new participants to an existing one: in this section, you can see the limit configured for your account. If you still see “512,” don’t worry: since it is a small test as happened in Argentina with the feature that lets share media files up to 2GB in size, it might take a while before reaching all other WhatsApp accounts, so nothing is wrong with your account.
As of now, there has been no official confirmation from Meta about the addition of this feature to WhatsApp Messenger, but it is currently rolling out to some lucky beta testers on WhatsApp beta for Android and iOS this week. Hopefully, it will be available to all users shortly.