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

https://jaspersmasterinsights.opalvector.com/posts/i-keep-searching-for-chatgpt-plus-trial-codes-what-should-i-do-instead

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