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

https://jaspersmasterinsights.opalvector.com/posts/how-do-i-activate-a-chatgpt-free-trial-in-the-mobile-app-if-i-m-eligible

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