OpenAI CEO Sam Altman’s sister, Ann Altman, filed a lawsuit alleging he regularly sexually assaulted her between 1997 and 2006.
The complaint, which was filed Jan. 6 in a U.S. District Court in the Eastern District of Missouri, alleges that the abuse began when she was three years old and Mr. Altman was 12.
In a joint statement on X, along with his mother and two brothers, Mr Altman denied the allegations, saying “all of these claims are completely false.”
“Caring for a family member facing mental health issues is incredibly difficult,” the statement added.
“This situation is causing immense pain to our entire family.”
In the filing, which was seen by the BBC, Ms Altman claimed the abuse, which took place over many years, included rape.
The lawsuit adds that the last instance of alleged abuse took place when Mr. Altman was an adult but she was still a minor.
The suit sought a jury trial and damages of more than $75,000 ($60,100).
Ms Altman has previously made similar allegations against her brother on social media platforms such as X.
Mr. Altman is one of the most high-profile figures in the world of technology.
In late 2022, OpenAi launched the generative artificial intelligence (AI) chatbot ChatGPT.
Additional reporting by Lily Jamali