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

https://wiki-coast.win/index.php/ChatGPT_Plus_Free_Trial_vs_Free_Plan:_What%E2%80%99s_the_Difference%3F

ChatGPT offers a permanent Free plan with basic features available to all users. Occasionally, targeted promotions provide free trials for the Plus plan, which may require a credit card and auto-renew unless canceled