ChatGPT offers a permanent Free plan that anyone can use without limitations....

https://lanesniceblog.scriblorax.com/posts/is-there-a-standard-1-month-chatgpt-plus-free-trial

ChatGPT offers a permanent Free plan that anyone can use without limitations. Occasionally, targeted users may get a trial for the Plus plan, which usually requires a card and auto-renews when the trial ends