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

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

ChatGPT offers a free plan that’s always available with basic features. Occasionally, targeted users qualify for a free trial of the Plus plan, which may require a payment card and auto-renews when the trial ends