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

https://wiki-neon.win/index.php/What_Are_the_Three_Ways_a_ChatGPT_Trial_Can_Reach_You%3F

ChatGPT offers a permanent Free plan available to everyone with basic access. Occasionally, targeted users get a free trial of the ChatGPT Plus plan, which may require a card and auto-renews after the trial ends