ChatGPT offers a permanent Free plan with basic features available to everyone....

https://stateofseo.com/does-chatgpt-free-ever-expire-or-turn-into-a-paid-plan-automatically/

ChatGPT offers a permanent Free plan with basic features available to everyone. Occasionally, targeted users get a free trial of ChatGPT Plus, which may require a credit card and auto-renews at the trial’s end