A recent tour of Tesla's Fremont factory left one observer describing it as 'eye-opening' — and the numbers back that up. The facility, which spans over 5.3 million square feet (roughly four times the footprint of Disneyland), employs more than 20,000 people and is currently in the middle of one of the most significant production pivots in the company's history.
A Factory in Transition
The Fremont plant has long been Tesla's manufacturing backbone, producing nearly 560,000 vehicles in 2023 alone. Today it continues to build the Model 3 and Model Y — but the floor space is changing. According to multiple reports, Tesla officially ceased production of the Model S and Model X at Fremont around May 10, 2026. The decision wasn't surprising in hindsight: the two flagship models accounted for less than 3% of Tesla's total vehicle sales in 2025, and their dedicated production line was running at under 30% utilization.
That freed-up floor space isn't sitting idle. Tesla is converting it into a manufacturing line for the Optimus humanoid robot, with the transition expected to complete within four months.
Optimus Takes Center Stage
Fremont has been designated as the primary hub for Optimus manufacturing — a significant bet on a product category that didn't exist in Tesla's lineup two years ago. Low-volume production of the third-generation Optimus is targeted for later in 2026, with some reports pointing to a late July or August start. High-volume scaling is planned for 2027, with Tesla's long-term target set at 1 million units annually.
Enterprise clients are projected to receive early deliveries in the second half of 2026. Broader external deployment — meaning Optimus working in environments outside Tesla's own facilities — is expected to begin in 2027.
For context on the ambition here: the same factory that took years to ramp Model 3 production (famously described as 'production hell') is now being asked to industrialize an entirely new product category on a compressed timeline.
Regulatory Friction
The tour came at a complicated moment for the facility. On June 10, 2026 — just days before the visit — the Bay Area Air Quality Management District issued 17 new notices of violation to the Fremont plant. The alleged violations include unauthorized construction and operations, as well as noncompliance with federal regulatory requirements. Tesla has not yet publicly responded to the notices.
It's a reminder that scaling a factory of this size comes with friction on multiple fronts simultaneously — workforce, logistics, regulatory compliance, and now an entirely new product line.
What the tour underscores is that Fremont remains an active, evolving operation — not a legacy plant coasting on existing products. Whether the Optimus ramp executes on its aggressive timeline will be one of the more closely watched manufacturing stories of the next 18 months.
Sarah focuses on Tesla Energy, SpaceX missions, and the broader Musk AI portfolio. Former data analyst in clean energy. Based in San Francisco.
Sources verified at publish time. Spotted an inaccuracy? Email editorial@basenor.com.
