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

https://gregorysbrilliantchat.lucialpiazzale.com/what-happens-when-a-chatgpt-free-trial-ends-do-i-lose-my-chats

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