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

https://harperscoolthoughts.inkharbory.com/posts/how-do-i-avoid-getting-tricked-by-a-fake-chatgpt-pro-trial-landing-page

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