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Tesla is looking at Boring Co. tunnels to transport materials for Model 3 production
Elon Musk’s The Boring Company could be brought in to help the Tesla Factory at Fremont in the manufacturing of the Model 3. In a statement during Wednesday’s Q4 earnings call, the Must noted that the company is looking to build a tunnel between its 901 Page Ave. seat factory in Fremont to the main Tesla Factory roughly 3 miles away at 45500 Fremont Blvd.
While discussing an inquiry from Bank of America’s John Murphy, who asked about the company’s production plans for the Model 3 and a possible manufacturing limit on the Tesla Factory, CTO JB Straubel stated that issues do emerge in the transportation of materials from one facility to the next.
According to the Tesla executive, the company is developing high-density and high-velocity lines, but limits emerge when it comes to how quickly materials can get transported from one line to another. Thus, when the Model 3 production hits its full pace, the limit to production would lie in how many trucks can dock after going to and from each factory.
During these discussions, Tesla CEO Elon Musk unveiled a novel idea, stating that the California-based electric car maker and energy company would be using The Boring Company tunnels as a way to expedite the transportation of materials from one facility to the next.
“We are looking at building tunnels, using The Boring Company’s thing, because we have, for example, our seats production is at a separate building on Page. And we have a bunch of trucks moving seats back and forth between both the primary Fremont production and the seat factory.
“And we actually get constrained on how many trucks can we dock and undock at the seat factory, which is only, I don’t know, half a mile or a mile away from the vehicle plant. So it’ll be pretty easy to just have a tunnel, do an automated conveyance from seats to the factory,” Musk said.
Overall, Musk is optimistic about the potential of using The Boring Co.’s machines and tunnels as a way to help increase the pace of Tesla’s manufacturing. The Tesla CEO even noted that if the company manages to accomplish this, the optimal pace of the main Fremont facility could improve to 700,000 vehicles per year, comprised of 600,000 Model 3 and 100,000 Model S and X.
“And there are things we can do, where we can build sub-systems and then transport sub-systems to Fremont. These things get increasingly difficult, but they’re all doable. But I can see a path where we get to say 600,000 Model 3 production and 100,000 S and X, so maybe 700,000, which should be like almost 50% more than GM or Toyota got out of the plant. I mean that seems achievable,” Musk said.
Tesla’s Fremont Blvd. and Page Ave. facility are roughly three miles apart by car, which, under normal conditions, would take about 10-14 minutes of travel, according to Google Map estimates. With a tunnel system in place, the time it would take to transport materials between the two factories would be significantly reduced, along with the infrastructure needed to support a high volume of commercial trucks.
Elon Musk did not specify any other details about the idea, though the online community has posted a rough idea of where the tunnel between the main Fremont facility and the Page Ave. factory might run. A link to the possible tunnel between the two plants could be viewed below.
As we covered in a previous report, The Boring Co. is currently attempting to secure all the permits and documentation needed to dig a proof-of-concept tunnel from northeast Westchester to Brentwood, CA. The proposed 6.5-mile tunnel system is planned to run under Sepulveda Boulevard, right across Culver City, and is aimed to showcase the benefits of Elon Musk’s tunnel system to the city’s traveling public.
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Tesla confirms that it finally solved its 4680 battery’s dry cathode process
The suggests the company has finally resolved one of the most challenging aspects of its next-generation battery cells.
Tesla has confirmed that it is now producing both the anode and cathode of its 4680 battery cells using a dry-electrode process, marking a key breakthrough in a technology the company has been working to industrialize for years.
The update, disclosed in Tesla’s Q4 and FY 2025 update letter, suggests the company has finally resolved one of the most challenging aspects of its next-generation battery cells.
Dry cathode 4680 cells
In its Q4 and FY 2025 update letter, Tesla stated that it is now producing 4680 cells whose anode and cathode were produced during the dry electrode process. The confirmation addresses long-standing questions around whether Tesla could bring its dry cathode process into sustained production.
The disclosure was highlighted on X by Bonne Eggleston, Tesla’s Vice President of 4680 batteries, who wrote that “both electrodes use our dry process.”
Tesla first introduced the dry-electrode concept during its Battery Day presentation in 2020, pitching it as a way to simplify production, reduce factory footprint, lower costs, and improve energy density. While Tesla has been producing 4680 cells for some time, the company had previously relied on more conventional approaches for parts of the process, leading to questions about whether a full dry-electrode process could even be achieved.
4680 packs for Model Y
Tesla also revealed in its Q4 and FY 2025 Update Letter that it has begun producing battery packs for certain Model Y vehicles using its in-house 4680 cells. As per Tesla:
“We have begun to produce battery packs for certain Model Ys with our 4680 cells, unlocking an additional vector of supply to help navigate increasingly complex supply chain challenges caused by trade barriers and tariff risks.”
The timing is notable. With Tesla preparing to wind down Model S and Model X production, the Model Y and Model 3 are expected to account for an even larger share of the company’s vehicle output. Ensuring that the Model Y can be equipped with domestically produced 4680 battery packs gives Tesla greater flexibility to maintain production volumes in the United States, even as global battery supply chains face increasing complexity.
Elon Musk
Tesla Giga Texas to feature massive Optimus V4 production line
This suggests that while the first Optimus line will be set up in the Fremont Factory, the real ramp of Optimus’ production will happen in Giga Texas.
Tesla will build Optimus 4 in Giga Texas, and its production line will be massive. This was, at least, as per recent comments by CEO Elon Musk on social media platform X.
Optimus 4 production
In response to a post on X which expressed surprise that Optimus will be produced in California, Musk stated that “Optimus 4 will be built in Texas at much higher volume.” This suggests that while the first Optimus line will be set up in the Fremont Factory, and while the line itself will be capable of producing 1 million humanoid robots per year, the real ramp of Optimus’ production will happen in Giga Texas.
This was not the first time that Elon Musk shared his plans for Optimus’ production at Gigafactory Texas. During the 2025 Annual Shareholder Meeting, he stated that Giga Texas’ Optimus line will produce 10 million units of the humanoid robot per year. He did not, however, state at the time that Giga Texas would produce Optimus V4.
“So we’re going to launch on the fastest production ramp of any product of any large complex manufactured product ever, starting with building a one-million-unit production line in Fremont. And that’s Line one. And then a ten million unit per year production line here,” Musk stated.
How big Optimus could become
During Tesla’s Q4 and FY 2025 earnings call, Musk offered additional context on the potential of Optimus. While he stated that the ramp of Optimus’ production will be deliberate at first, the humanoid robot itself will have the potential to change the world.
“Optimus really will be a general-purpose robot that can learn by observing human behavior. You can demonstrate a task or verbally describe a task or show it a task. Even show it a video, it will be able to do that task. It’s going to be a very capable robot. I think long-term Optimus will have a very significant impact on the US GDP.
“It will actually move the needle on US GDP significantly. In conclusion, there are still many who doubt our ambitions for creating amazing abundance. We are confident it can be done, and we are making the right moves technologically to ensure that it does. Tesla, Inc. has never been a company to shy away from solving the hardest problems,” Musk stated.
Elon Musk
Rumored SpaceX-xAI merger gets apparent confirmation from Elon Musk
The comment follows reports that the rocket maker is weighing a transaction that could further consolidate Musk’s space and AI ventures.
Elon Musk appeared to confirm reports that SpaceX is exploring a potential merger with artificial intelligence startup xAI by responding positively to a post about the reported transaction on X.
Musk’s comment follows reports that the rocket maker is weighing a transaction that could further consolidate his space and AI ventures.
SpaceX xAI merger
As per a recent Reuters report, SpaceX has held discussions about merging with xAI, with the proposed structure potentially involving an exchange of xAI shares for SpaceX stock. The value, structure, and timing of any deal have not been finalized, and no agreement has been signed.
Musk appeared to acknowledge the report in a brief reply on X, responding “Yeah” to a post that described SpaceX as a future “Dyson Swarm company.” The comment references a Dyson Swarm, a sci-fi megastructure concept that consists of a massive network of satellites or structures that orbit a celestial body to harness its energy.
Reuters noted that two entities were formed in Nevada on January 21 to facilitate a potential transaction for the possible SpaceX-xAI merger. The discussions remain ongoing, and a transaction is not yet guaranteed, however.
AI and space infrastructure
A potential merger with xAI would align with Musk’s stated strategy of integrating artificial intelligence development with space-based systems. Musk has previously said that space-based infrastructure could support large-scale computing by leveraging continuous solar energy, an approach he has framed as economically scalable over time.
xAI already has operational ties to Musk’s other companies. The startup develops Grok, a large language model that holds a U.S. Department of Defense contract valued at up to $200 million. AI also plays a central role in SpaceX’s Starlink and Starshield satellite programs, which rely on automation and machine learning for network management and national security applications.
Musk has previously consolidated his businesses through share-based transactions, including Tesla’s acquisition of SolarCity in 2016 and xAI’s acquisition of X last year. Bloomberg has also claimed that Musk is considering a merger between SpaceX and Tesla in the future.
Tesla confirms that it finally solved its 4680 battery’s dry cathode process
Tesla Giga Texas to feature massive Optimus V4 production line
