The misinformation boosted by X’s AI model Grok has included conspiracy theories about voter fraud and unsubstantiated smears about Vice President Kamala Harris.

Elon Musk’s social media app X is supercharging the spread of voter-fraud conspiracy theories with the help of artificial intelligence, boosting unfounded claims including two personal smears against Vice President Kamala Harris.

The dubious content is spreading in the app’s “explore” section, which says it uses Musk’s AI software, named Grok, to aggregate trending social media topics. The information does not appear to be fact-checked by humans, and in several recent examples it seemed to repeat false or unsubstantiated claims as if they were true.