ChatGPT offers a free plan that anyone can use indefinitely with basic...

https://emiliosbestinsights.rivetgarden.com/posts/is-there-a-chatgpt-go-trial-and-how-is-it-different-from-chatgpt-plus

ChatGPT offers a free plan that anyone can use indefinitely with basic features. Occasionally, targeted users get a free trial of ChatGPT Plus, which may require a payment card and auto-renews when the trial ends