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

https://eduardosnicechat.publishlane.com/posts/what-should-i-do-if-i-need-a-trial-for-work-but-openai-isn-t-targeting-my-account

ChatGPT offers a free plan that anyone can use without time limits. Occasionally, targeted users may get a Plus plan trial, which sometimes requires a payment card and auto-renews after the trial ends