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

https://wiki-tonic.win/index.php/Is_the_Suprmind_Trial_Really_No_Credit_Card_and_How_Long_Is_It%3F

ChatGPT offers a permanent Free plan available to all users with basic access. Occasionally, targeted promotions include free trials for the ChatGPT Plus plan, which may require a payment card and auto-renew after the trial ends