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

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

ChatGPT offers a permanent Free plan anyone can use without time limits. Occasionally, Plus plan trials are available as targeted promotions. Some trials require a payment card and will auto-renew into a paid Plus subscription once the trial ends