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Tesla files to expand Fremont factory, make Model Y ‘tent’ permanent

A snapshot from a drone flyover of the Tesla Fremont factory on June 29, 2018. [Credit: DarkSoldier 360/YouTube]

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Tesla has filed an application with the City of Fremont to expand its vehicle production facility by 64,000 square feet. The application describes plans to implement foundations and install below-ground utilities under General Assembly 4.5 (GA 4.5), where the Model Y production lines are located at the Fremont factory.

GA 4.5 is currently a tent, or spring structure, that sits outside of Tesla’s Fremont factory. It has been home to the Model Y production and possibly the Model 3 as well since February 2020. According to past permit filings with the City of Fremont’s local government, Tesla initially opened the tent outside during this time and has added to the tent on several occasions.

Tesla’s General Assembly 4.5 line at the Fremont Factory. (Credit: Ryan Ferrin | YouTube)

Tesla is now looking to make GA 4.5 permanent by adding a 64,000 square foot structure onto the Fremont factory. The spring structure that was used before was erected in a pinch as Tesla was planning to begin the production of the Model Y but didn’t have the space for it with Model S, Model X, and Model 3 production all going on under the same roof.

The filing, known as BLD2021-05126, also called Foundations for GA 4.5 South Expansion, states:

“Foundations and underground utilities for proposed 64,000 sf south expansion.”

Credit: City of Fremont

Tesla will add GA 4.5 to the Southern portion of the Fremont factory, expanding the factory itself, and at the same time, making the 4.5 assembly lines permanent with foundational structures and underground plumbing and electrical work.

It seems that it was only a matter of time before Tesla expanded the Fremont factory to make way for more projects. While demand continues to expand globally, Tesla is still funneling many of its vehicles from the Fremont factory in Northern California. The plant handles global Model S and Model X demand, while Model 3 demand is split with Giga Shanghai. Some Model 3s from Fremont have made their way to other countries that aren’t in North America, but it seems that Giga Shanghai is taking some of the load, especially in the European market.

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Last year, Tesla expanded the Model Y production lines to make way for the IDRA Giga Press. This was filed in July 2020, and the Giga Press is now operational at the facility and is cranking out single-piece rear castings for the Model Y crossover. Tesla attempted to expand GA 4.5 in April but had to solve issues with stormwater drainage before the project was ultimately approved.

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The Fremont factory has been in Tesla’s possession since 2010 after the company purchased it from Toyota’s New United Motor Manufacturing, Inc. The first Model S rolled off the lines at Fremont in 2012, and the company has made numerous improvements to the facility since being in its possession. The expansion of the facility to make GA 4.5 permanent will alleviate space constraints, allowing Tesla to build more of its all-electric vehicles for a constantly growing and expanding consumer base.

Tesla didn’t immediately respond to Teslarati’s inquiry about the expansion.

Here’s a recent flyover of the Fremont Factory by Gabeincal.

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Joey has been a journalist covering electric mobility at TESLARATI since August 2019. In his spare time, Joey is playing golf, watching MMA, or cheering on any of his favorite sports teams, including the Baltimore Ravens and Orioles, Miami Heat, Washington Capitals, and Penn State Nittany Lions. You can get in touch with joey at joey@teslarati.com. He is also on X @KlenderJoey. If you're looking for great Tesla accessories, check out shop.teslarati.com

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Tesla ‘Mad Max’ gets its first bit of regulatory attention

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Credit: Teslarati

Tesla “Mad Max” mode has gotten its first bit of regulatory attention, as the National Highway Traffic Safety Administration (NHTSA) has asked for additional information on the Speed Profile.

A few weeks ago, Tesla officially launched a new Speed Profile for Full Self-Driving (Supervised) known as “Mad Max,” which overtook the “Hurry” mode for the fastest setting FSD offers.

Tesla launches ‘Mad Max’ Full Self-Driving Speed Profile, its fastest yet

It launched with Full Self-Driving v14.1.2, and it was no secret that the company was looking for a new mode that would cater to more aggressive driving styles.

The release notes showed the description of the Speed Profile as:

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“Introduced new speed profile MAD MAX, which comes with higher speeds and more frequent lane changes than Hurry.”

It certainly lived up to its description. In our testing, it was aggressive, fast, and drove similarly to some of the more challenging traffic patterns I’ve come across.

In normal highway driving, it was one of the quicker cars on the road, while other applications saw it be a suitable version for navigating things like rush-hour traffic.

Here’s what my experience with it was:

While Tesla owners have certainly enjoyed the feature and the behaviors of Mad Max, the NHTSA said it is in contact with Tesla about it, looking to gather additional information. Additionally, it said:

“The human behind the wheel is fully responsible for driving the vehicle and complying with all traffic safety laws.”

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The important thing to note with Mad Max mode, along with the other Speed Profiles, is that the driver can choose whichever one they’d like, and they all cater to different driving styles.

While Mad Max is more aggressive, modes like “Sloth” and “Standard” are significantly more conservative and can be more suitable for those who are not comfortable with the faster, more spirited versions.

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Tesla shares AI5 chip’s ambitious production roadmap details

Tesla CEO Elon Musk has revealed new details about the company’s next-generation AI5 chip, describing it as “an amazing design.”

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Image used with permission for Teslarati. (Credit: Tom Cross)

Tesla CEO Elon Musk has revealed new details about the company’s next-generation AI5 chip, describing it as “an amazing design” that could outperform its predecessor by a notable margin. Speaking during Tesla’s Q3 2025 earnings call, Musk outlined how the chip will be manufactured in partnership with both Samsung and TSMC, with production based entirely in the United States.

What makes AI5 special

According to Musk, the AI5 represents a complete evolution of Tesla’s in-house AI hardware, building on lessons learned from the AI4 system currently used in its vehicles and data centers. “By some metrics, the AI5 chip will be 40x better than the AI4 chip, not 40%, 40x,” Musk said during the Q3 2025 earnings call. He credited Tesla’s unique vertical integration for the breakthrough, noting that the company designs both the software and hardware stack for its self-driving systems.

To streamline the new chip, Tesla eliminated several traditional components, including the legacy GPU and image signal processor, since the AI5 architecture already incorporates those capabilities. Musk explained that these deletions allow the chip to fit within a half-reticle design, improving efficiency and power management. 

“This is a beautiful chip,” Musk said. “I’ve poured so much life energy into this chip personally, and I’m confident this is going to be a winner.”

Tesla’s dual manufacturing strategy for AI5

Musk confirmed that both Samsung’s Texas facility and TSMC’s Arizona plant will fabricate AI5 chips, with each partner contributing to early production. “It makes sense to have both Samsung and TSMC focus on AI5,” the CEO said, adding that while Samsung has slightly more advanced equipment, both fabs will support Tesla’s U.S.-based production goals.

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Tesla’s explicit objective, according to Musk, is to create an oversupply of AI5 chips. The surplus units could be used in Tesla’s vehicles, humanoid robots, or data centers, which already use a mix of AI4 and NVIDIA hardware for training. “We’re not about to replace NVIDIA,” Musk clarified. “But if we have too many AI5 chips, we can always put them in the data center.”

Musk emphasized that Tesla’s focus on designing for a single customer gives it a massive advantage in simplicity and optimization. “NVIDIA… (has to) satisfy a large range of requirements from many customers. Tesla only has to satisfy one customer, Tesla,” he said. This, Musk stressed, allows Tesla to delete unnecessary complexity and deliver what could be the best performance per watt and per dollar in the industry once AI5 production scales.

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Tesla VP hints at Solar Roof comeback with Giga New York push

The comments hint at possible renewed life for the Solar Roof program, which has seen years of slow growth since its 2016 unveiling.

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Image Credit: Tesla/Twitter

Tesla’s long-awaited and way underrated Solar Roof may finally be getting its moment. During the company’s Q3 2025 earnings call, Vice President of Energy Engineering Michael Snyder revealed that production of a new residential solar panel has started at Tesla’s Buffalo, New York facility, with shipments to customers beginning in the first quarter of 2026. 

The comments hint at possible renewed life for the Solar Roof program, which has seen years of slow growth since its 2016 unveiling.

Tesla Energy’s strong demand

Responding to an investor question about Tesla’s energy backlog, Snyder said demand for Megapack and Powerwall continues to be “really strong” into next year. He also noted positive customer feedback for the company’s new Megablock product, which is expected to start shipping from Houston in 2026.

“We’re seeing remarkable growth in the demand for AI and data center applications as hyperscalers and utilities have seen the versatility of the Megapack product. It increases reliability and relieves grid constraints,” he said.

Snyder also highlighted a “surge in residential solar demand in the US,” attributing the spike to recent policy changes that incentivize home installations. Tesla expects this trend to continue into 2026, helped by the rollout of a new solar lease product that makes adoption more affordable for homeowners.

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Possible Solar Roof revival?

Perhaps the most intriguing part of Snyder’s remarks, however, was Tesla’s move to begin production of its “residential solar panel” in Buffalo, New York. He described the new panels as having “industry-leading aesthetics” and shape performance, language Tesla has used to market its Solar Roof tiles in the past.

“We also began production of our Tesla residential solar panel in our Buffalo factory, and we will be shipping that to customers starting Q1. The panel has industry-leading aesthetics and shape performance and demonstrates our continued commitment to US manufacturing,” Snyder said during the Q3 2025 earnings call.

Snyder did not explicitly name the product, though his reference to aesthetics has fueled speculation that Tesla may finally be preparing a large-scale and serious rollout of its Solar Roof line.

Originally unveiled in 2016, the Solar Roof was intended to transform rooftops into clean energy generators without compromising on design. However, despite early enthusiasm, production and installation volumes have remained limited for years. In 2023, a report from Wood Mackenzie claimed that there were only 3,000 operational Solar Roof installations across the United States at the time, far below forecasts. In response, the official Tesla Energy account on X stated that the report was “incorrect by a large margin.”

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