ChatGPT offers a free plan that anyone can use without time limits....

https://wiki-planet.win/index.php/Why_Does_ChatGPT_Plus_Cost_$20_a_Month_After_the_Trial_Ends%3F

ChatGPT offers a free plan that anyone can use without time limits. Occasionally, targeted users may get a free trial for the Plus plan. Some of these trials require a payment card and will auto-renew when the trial ends