Rhianna Pfefferkorn

X says it has barred users from making sexually explicit images of people by publicly tagging the Grog chatbot.

And in countries with relevant laws, it also bars private attempts to make these images.

While many such images have been taken down, users were still able to bypass the new policy.

Rhianna Pfefferkorn is a policy fellow at Stanford University.

Also, these restrictions do not apply to a standalone version of Grok.

Huo Jingnan, NPR News.