Tesla is on the cusp of announcing a major semiconductor initiative, according to CEO Elon Musk, whosaidin a Mar. 14 post that a “Terafab projectlaunches in 7 days.”

The Terafab project is expected to be Tesla’s own chip fabrication facility, or “fab,” to help push forward its artificial-intelligence business goals.

Musk’s post means some news should arrive on Saturday. Exactly what’s coming, however, is hard to say.

What investors do know is that “Terafab” is about manufacturing the microchips Tesla needs to meet its “physical AI” ambitions—such as producing millions of robo-taxis and the humanoid robots it has named Optimus.

What investors don’t know yet is how the Terafab project will unfold. Here’s what we do know.

The Scale Will Be Big

Whatever comes, the fab will need to be big.

“If Tesla hits its long-term Optimus target (100 million-plus per year), it would require 200 million-plus chips or greater than 50 times its current demand across auto and robo-taxi,” wrote Morgan Stanley analyst Andrew Percoco on Monday.

Getting into semiconductor production isn’t a small undertaking, though. A fab costs tens of billions to build, and chip development can cost billions more.

Tesla generated about $6 billion in free cash flow in 2025. It isn’t expected to generate positive free cash flow in 2026. It plans to spend $20 billion on new equipment, up from less than $9 billion in 2025.

Supply Is a Problem to Be Solved

Building a fab is a risky, expensive proposition. Tesla, however, might not have a choice.

“Currently, with sold-out chips and supply chain bottlenecks, getting enough high-powered AI chips is becoming increasingly difficult,” says Andrew Rocco, stock strategist at Zacks Investment Research.

Musk agrees. On the company’s fourth-quarter earnings call, he said the “best-case output” from Tesla’s key suppliers wouldn’t be enough.

“In order to remove the probable constraint in three or four years, we’re going to have to build a Tesla Terafab, a very big fab that includes logic, memory and packaging domestically,” he said at the time.

Having enough supply and relying less on external supply chains for chips is key to the company’s plans for growth.

“Tesla’s Terafab project will ensure self-reliance,” Rocco says. “Because Tesla is moving further away from its legacy EV business and focusing more on its AI ambitions, the project is critical to the company’s success.”

A Partner Is Likely

Tesla probably won’t be on the hook for the full cost of any fab construction. Rocco sees Tesla taking a hybrid approach, tapping a partner to help.

Tesla partnered with Panasonic in 2014 to build EV batteries, and already has a partnership with Samsung to manufacture its AI6 chip.

Samsung makes Tesla’s AI4 chip.

It’s All About Tesla’s AI-Led Future

Tesla, however, might not use a funding partner.

“We believe Terafab will be a Tesla-solo funded project with potential chip partners,” says Wedbush analyst Dan Ives. “It’s a smart move and part of the broader AI strategic move for Musk and Tesla.”

Tesla stock is all about AI now. Coming into the week, shares were up almost 60% over the past 12 months. Shares trade for about 190 times estimated 2026 earnings, despite two years of falling EV sales.

If a fab helps Tesla execute its AI strategy, investors are likely to support Musk’s plan.