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

https://sergiossplendidcolumn.timeforchangecounselling.com/if-my-trial-needs-a-card-will-it-charge-exactly-on-the-end-date

ChatGPT offers a free plan that’s always available with basic features. Occasionally, targeted users get free trials for the Plus plan, which may require a payment card and auto-renew unless canceled