ChatGPT offers a permanent Free plan available to everyone with basic features....

https://wiki-canyon.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 everyone with basic features. Occasionally, OpenAI runs targeted free trials for the Plus plan, which may require a payment card and auto-renew unless canceled