ChatGPT offers a permanent Free plan anyone can use without a trial....

https://mag-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 anyone can use without a trial. Occasionally, targeted users get a free trial of the Plus plan, which may require a card and auto-renews after the trial ends