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

https://wiki-aero.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 features at no cost. Occasionally, targeted users receive a free trial for the ChatGPT Plus plan, which may require adding a payment method and auto-renews when the trial ends