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

https://zoom-wiki.win/index.php/ChatGPT_Plus_Free_Trial_vs_Free_Plan:_What%E2%80%99s_the_Difference%3F

ChatGPT offers a permanent Free plan anyone can use without a trial. Occasionally, targeted Plus plan trials are available, which may require a payment method and auto-renew when the trial ends