Sergey Brin, the co-founder of Google, claims that a 60-hour workweek is the “sweet spot” for productivity in a recent memo sent to employees.

In the note, shared internally and viewed by the New York Times, Brin urges staff working on Google’s Gemini AI projects to put in long hours to help the company lead the race in artificial general intelligence (AGI).

Some have praised Brin’s commitment to pushing the company’s success, but others argue that his approach reflects an outdated and harmful mindset.

“The hustle-centric 60-hour week isn’t productivity—it’s burnout waiting to happen,” wrote workplace mental health educator Catherine Eadie in a post shared by LinkedIn’s news editors.

Others said they feel that hard work is essential for success, with a COO of a business analytics business writing, “Brin is just being honest—successful people have always put in long hours."