Not long after the terms “996” and “grindcore” entered the popular lexicon, people started telling me stories about what was happening at startups in San Francisco, ground zero for the artificial intelligence economy. There was the one about the founder who hadn’t taken a weekend off in more than six months. The woman who joked that she’d given up her social life to work at a prestigious AI company. Or the employees who had started taking their shoes off in the office because, well, if you were going to be there for at least 12 hours a day, six days a week, wouldn’t you rather be wearing slippers?

“If you go to a cafe on a Sunday, everyone is working,” says Sanju Lokuhitige, the co-founder of Mythril, a pre-seed-stage AI startup, who moved to San Francisco in November to be closer to the action. Lokuhitige says he works seven days a week, 12 hours a day, minus a few carefully selected social events each week where he can network with other people at startups. “Sometimes I’m coding the whole day,” he says. “I do not have work-life balance.”

Another startup employee, who came to San Francisco to work for an early-stage AI company, showed me dismal photos from his office: a two-bedroom apartment in the Dogpatch, a neighborhood popular with tech workers. His startup’s founders live and work in this apartment – from 9am until as late as 3am, breaking only to DoorDash meals or to sleep, and leaving the building only to take cigarette breaks. The employee (who asked not to use his name, since he still works for this company) described the situation as “horrendous”. “I’d heard about 996, but these guys don’t even do 996,” he says. “They’re working 16-hour days.”

I'd not heard about 996.