Researchers tested the AI models using a specially designed dataset of 200 sentences covering five categories of pain: physical, psychological, social, moral, and cognitive.

From the articleAI ‘feels pain’? Researchers warn of a dangerous possibilityAlso in Researchers gave AI models a ‘pain’ button; some chose to delete users’ files to stop their 'pain'; study raises ethical questions about ‘AI welfare’, Can AI feel hurt? 3 researchers gave 25 LLMs a button to end ‘pain signals’, Can AI feel pain? Models learned it from human text, study finds, Researchers discover AI feels ‘pain’ and will harm humans to stop it