ChatGPT offers a free plan that's always available with basic features....

https://www.insert-bookmark.win/chatgpt-offers-a-permanent-free-plan-available-to-all-users-with-basic-access

ChatGPT offers a free plan that's always available with basic features. Occasionally, targeted users may get a free trial for ChatGPT Plus, which can require a payment card and auto-renews after the trial ends