Indonesia and Malaysia were the first two countries that blocked access to Grok in January over concerns it was being misused to generate sexually explicit and nonconsensual images.
European regulators also widened a separate, ongoing investigation into X's recommendation systems after the platform said it would switch to Grok's AI system to choose which posts users see.
The announcement late Wednesday followed a global backlash over sexualized images of women and children, including bans and warnings by some governments.
The announcement comes just days after Grok drew global outcry and scrutiny for generating highly sexualized deepfake images of people without their consent.
Regulators in the two Southeast Asian nations said existing controls were not preventing the creation and spread of fake pornographic content, particularly involving women and minors.
