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

https://www.foxtrot-bookmarks.win/chatgpt-offers-a-free-plan-that-anyone-can-use-with-no-time-limit

ChatGPT offers a permanent Free plan anyone can use without a trial. Occasionally, targeted promotions provide trials for the Plus plan, which may require a card and auto-renew when the trial ends