The UK government says Elon Musk's platform X limiting Grok AI image edits to paid users is "insulting" to victims of misogyny and sexual violence.
Speaking on Friday, Downing Street said the move "simply turns an AI feature that allows the creation of unlawful images into a premium service".
It follows significant backlash after Grok digitally altered images of others by undressing them - something it says it now can only do for those who pay a monthly fee.
But the prime minister's official spokesperson told reporters on Friday it showed X - which has not yet commented - "can move swiftly when it wants to do so".