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

https://ricardosinterestingwords.swiftnestly.com/posts/do-us-veterans-really-get-a-full-year-of-chatgpt-plus-for-free

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