In an internal memo seen by the New York Times, the Google cofounder told employees working on Gemini, which develops the company's suite of AI products, that he recommends being in the office "at least every weekday" and that "60 hours a week is the sweet spot of productivity."

The tech giant’s co-founder said that if employees worked harder and were in the office more, the company could reach an artificial general intelligence breakthrough.

Google co-founder Sergey Brin has told engineers that they should return to the office five days a week to help improve AI models that could ultimately replicate their work. The reclusive billionaire himself started returning to Mountain View following the launch of ChatGPT,