With Meta successfully poaching a number of its senior researchers, an OpenAI executive reportedly reassured team members Saturday that company leadership has not “been standing idly by.”

Four OpenAI researchers are leaving the company to go to Meta, two sources confirm to WIRED. Shengjia Zhao, Shuchao Bi, Jiahui Yu, and Hongyu Ren have joined Meta’s superintelligence team. Their OpenAI Slack profiles have been deactivated. The Information first reported on the departures.

Meta has successfully recruited four artificial intelligence researchers from OpenAI to join its newly formed superintelligence laboratory, underscoring the fierce competition between the two firms in AI development and talent acquisition.