Citation needed.

This is a New York Times article. By default, the New York Times is the citation, just like every other MSM. And even then, this specific article does attribute it:

To understand how this happened, The New York Times interviewed more than 40 current and former OpenAI employees — executives, safety engineers, researchers. Some of these people spoke with the company’s approval, and have been working to make ChatGPT safer. Others spoke on the condition of anonymity because they feared losing their jobs.