Separately at a conference in Bali, Mr Musk said he was working “the absolute most amount… from morning til night, seven days a week.”
Alongside Twitter, Mr Musk is also chief executive of electric car maker Tesla, rocket company SpaceX, and founder of tunnelling business the Boring Company.
He added: “I have too much work on my plate that is for sure.”
Mr Musk said on Monday he would be “working & sleeping” at Twitter’s offices in San Francisco “until org [sic] is fixed.”
The billionaire businessman has cut back on perks such as company-wide working from home since taking charge and is now demanding staff return to the office at least 40 hours per week.
Mr Musk’s decision to scrap free meals led to a confrontation with a former Twitter executive in charge of company real estate who challenging him over the cost of the company’s food bill.
Tracey Hawkins, a former real estate manager at Twitter, replied to Mr Musk’s claims, stating “attendance was anything from 20-50pc in the offices”. Free meals “enabled employees to work [through] lunchtime and [meetings],” she said.
The decision to ditch free meals for staff came hours after Mr Musk reportedly laid off 4,400 of Twitter’s 5,500 contractors, including some who monitor online safety.
This weekend, Twitter slashed the number of outsourced workers who handle reports of potentially hateful Tweets, according to technology newsletter Platformer. Twitter laid off around 50pc of its full-time staff earlier this month.