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

https://www.charliebookmarks.win/chatgpt-offers-a-permanent-free-plan-anyone-can-use-without-time-limits

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