ChatGPT offers a permanent Free plan available to all users with basic access....

https://magic-wiki.win/index.php/If_I_Cancel_ChatGPT_Plus_During_the_Trial,_Do_I_Keep_Access_Until_the_End_Date%3F

ChatGPT offers a permanent Free plan available to all users with basic access. Occasionally, targeted promotions provide free trials for the Plus plan, which may require a card and auto-renew unless canceled