Some Startups Are Demanding 12-Hour Days, Six Days a Week from Workers

As the artificial intelligence race heats up, many start-ups in Silicon Valley and New York are promoting hardcore culture as a way of life, pushing the limits of work hours, demanding that workers move fast to be first in the market. Some are even promoting 996 as a virtue in the hiring process and keeping “grind scores” of companies… Whoever builds first in AI will capture the market, and the window of opportunity is two to three years, “so you better run faster than everyone else,” said Inaki Berenguer, managing partner of venture-capital firm LifeX Ventures.

At San Francisco-based AI start-up Sonatic, the grind culture also allows for meal, gym and pickleball time, said Kinjal Nandy, its CEO. Nandy recently posted a job opening on X that requires in-person work seven days a week. He said working 10-hour days sounds like a lot but the company also offers its first hires perks such as free housing in a hacker house, food delivery credits and a free subscription to the dating service Raya… Mercor, a San Francisco-based start-up that uses AI to match people to jobs, recently posted an opening for a customer success engineer, saying that candidates should have a willingness to work six days a week, and it’s not negotiable. “We know this isn’t for everyone, so we want to put it up top,” the listing reads.

Being in-person rather than remote is a requirement at some start-ups. AI start-up StarSling had two engineering job descriptions that required six days a week of in-person work. In a job description for an engineer, Rilla, an AI company in New York, said candidates should not work at the company if they’re not excited about working about 70 hours a week in person. One venture capitalist even started tracking “grind scores.” Jared Sleeper, a partner at New York-based venture capital firm Avenir, recently ranked public software companies’ “grind score” in a post on X, which went viral. Using data from Glassdoor, it ranks the percentage of employees who have a positive outlook for the company compared with their views on work-life balance.

“At Google’s AI division, cofounder Sergey Brin views 60 hours per week as the ‘sweet spot’ for productivity,” notes the Independent:

Working more than 55 hours a week, compared with a standard 35-40-hour week, is linked to a 35 percent higher risk of stroke and a 17 percent higher risk of death from heart disease, according to the World Health Organization. Productivity also suffers. A British study shows that working beyond 60 hours a week can reduce overall output, slow cognitive performance, and impair tasks ranging from call handling to problem-solving.

Shorter workweeks, in contrast, appear to boost productivity. Microsoft Japan saw a roughly 40% increase in output after adopting a four-day work week. In a UK trial, 61 companies that tested a four-day schedule reported revenue gains, with 92 percent choosing to keep the policy, according to Bloomberg.