Last month, Mr. Musk publicly called out Microsoft for “illegally” using Twitter’s data to train its artificial intelligence technologies. “Lawsuit time,” he tweeted at the time.
Microsoft said it did not currently pay Twitter for its data. Frank Shaw, a Microsoft spokesman, said the company had received Twitter’s letter and would review the questions and respond. “We look forward to continuing our long-term partnership with the company,” he said.
Mr. Musk did not respond to a request for comment.
Mr. Musk and Microsoft have had a bumpy relationship recently. Among other things, Mr. Musk has feuded with Microsoft over OpenAI, the start-up behind the ChatGPT chatbot. Mr. Musk, who helped found OpenAI in 2015, has said Microsoft, which has invested $13 billion in OpenAI, controls the start-up’s business decisions. Microsoft has disputed that characterization.
Last month, Microsoft also said it would not pay for access to Twitter’s data and told customers of its advertising platform that it would remove Twitter from the platform. Advertisers use Microsoft’s ad platform to manage their social media accounts, including Twitter.
In recent months, Twitter and other organizations have also started to complain that the latest wave of A.I. technologies were built using their digital data. Reddit said last month that it would begin charging for access to its application programming interface, or API, so that its data could not be used for free.