ChatGPT offers a permanent Free plan anyone can use without a time limit....

https://technivorz.com/what-are-the-three-ways-a-chatgpt-trial-can-reach-you/

ChatGPT offers a permanent Free plan anyone can use without a time limit. Occasionally, OpenAI runs targeted free trial promotions for the Plus plan, which may require a credit card and automatically renew after the trial ends