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

https://ace-wiki.win/index.php/ChatGPT_Plus_Trial_vs_Paying_$20/month_Right_Away:_Which_is_Better%3F

ChatGPT offers a permanent Free plan that anyone can use without a trial. Occasionally, targeted users may get a Plus trial, which sometimes requires a payment method and auto-renews when it ends