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Tesla Cybertruck rear megacast leak first impressions from teardown veteran
The electric vehicle community was recently graced by an image showing a first glimpse at the Tesla Cybertruck rear megacast. The image was reportedly leaked from Gigafactory Texas.
The image itself surprised many, partly because of just how large the apparent Cybertruck rear megacast was. The Cybetruck’s rear megacast is expected to be massive, with CEO Elon Musk noting that the component would require the use of a machine that is far larger than the already gigantic Giga Presses used for the Model Y’s front and rear underbody.
Automotive veteran and teardown titan Sandy Munro, who has extensive experience analyzing Tesla’s electric vehicles, recently shared his first thoughts about the leaked image of the Cybertruck’s rear megacast. Initially, President of Munro & Associates Cory Steuben posted a short clip of Munro reacting to the image, and in a later video, the teardown titan shared some of his closer observations about the image.
In his first impressions, Munro was immediately struck by the size of the Cybertruck’s rear megacast. Munro summed up his first impressions in his comment about the image. “That’s actually more revolutionary than what I thought,” Munro noted, adding that he would like to see if the component was actually just one casting.
Munro shared his findings in a follow-up video posted on YouTube. Upon closer inspection, Munro noted that the component in the leaked image does not seem to be a single casting, at least not yet. Instead, the component that was photographed in the leak was a prototype comprised of about five components that were welded together.
“This is a prototype. It means that they’re trying it out to make sure that from a fit standpoint, it’ll all work. I’m gonna tell you right now, there are (five) components that you’re looking at. They’re welded together. these components are probably made — these castings, what look like they are castings — but they’re made in a different way,” Munro.
“It’s called Lost-foam (casting). So what I can do is I can make a foam pattern, something like that, pam it up in sand, and then I pour molten aluminum into that cast or into that mold, and that mold will sublimate the styrofoam. It’ll just vanish. It turns into a gas, and then it’ll fill up the core that’s inside that mold, and it’ll give me this casting. It’s great idea for a prototype part,” Munro observed.
Despite skepticism from some who believe the Cybertruck is just vaporware that will never be released, updates from Giga Texas and the increasing number of images of the all-electric pickup truck in Tesla’s facilities suggest that the vehicle is indeed nearing production. This was practically confirmed by Tesla in the Q3 2022 earnings call when the company stated that Giga Texas is on track to begin early Cybertruck production in the middle of 2023.
Check out Munro’s insights on the Cybertruck leak from Giga Texas in the video below.
Don’t hesitate to contact us with news tips. Just send a message to simon@teslarati.com to give us a heads up.
Elon Musk
Tesla’s next-gen Optimus prototype with Grok revealed
The video shows a new Optimus prototype answering questions and taking some very robotic steps, evidently revealing that the next-generation version is in its early stages of development.

Tesla’s next-generation Optimus robot with AI assistant Grok has been revealed in a new video shared on X.
Tesla CEO Elon Musk was with Salesforce CEO Marc Benioff last night, and it appears the frontman gave Benioff an exclusive look at some upcoming technology.
Tesla talks Semi ramp, Optimus, Robotaxi rollout, FSD with Wall Street firm
The video shows a new Optimus prototype answering questions and taking some very robotic steps, evidently revealing that the next-generation version is in its early stages of development. It features Grok for some additional utility, as it answered questions Benioff asked in the short video.
Here’s what was uploaded to X:
Crazy look at Tesla Optimus from Salesforce CEO Marc Benioff, who was hanging out with Elon Musk yesterday!
Love this gold color on you @Tesla_Optimus https://t.co/NGgDqVVf1g pic.twitter.com/q8286aBNKy
— TESLARATI (@Teslarati) September 3, 2025
It appears that there are several big changes to this next-generation version of Optimus, some of which have been discussed by Musk and Tesla in the past.
The first is purely cosmetic, but the gold color that Optimus is wearing in this is a new and fresh look that we have not seen before.
Perhaps the most interesting change that is evident here is the hands, which are much more detailed than past versions of Optimus:
However, we’re not too sure that these are what will be released with the next-gen Optimus, because they don’t appear to be functional, and they are more reminiscent of mannequin hands than anything.
The hands on Optimus have been a significant part of the program, as they are among the most crucial pieces of equipment on a robot. It needs to be able to perform both delicate and more imposing tasks. Tesla has aimed for Optimus to be able to thread needles or play the piano.
It was one of the most discussed improvements the company mentioned in past comments regarding how it planned to improve from Gen 2 to this next version.
Musk mentioned regarding Optimus:
“Next-generation Optimus hand, which we have in prototype form, has actuators that have moved to the forearm, just like humans, and they operate the fingers through cables, just like human hands.”
Within Optimus lies a significant opportunity for Tesla to gain considerable strength in terms of market share and valuation.
If Tesla can efficiently develop and deploy the humanoid robot over the next several years, the company stands to gain, as companies will utilize it for tasks that require tedious labor.
Musk recently said Optimus will be a major contributor to Tesla’s valuation moving forward. He believes it will make up roughly 80 percent of the company’s value.
Elon Musk
Tesla CEO Elon Musk to provide more details for Master Plan Part IV
Musk stated that he would be adding specifics to the plan in a later update.

Tesla CEO Elon Musk will be adding more specifics to the recently-released Master Plan Part IV. Musk shared the update on social media platform X amidst conversations about the general nature of the Master Plan Part IV.
In a conversation on X, Musk responded to a post from Tesla retail shareholder and bull Dave Lee, who observed that the currently released Master Plan Part IV could really just be the introduction to the real plan due to its absence of specifics.
Elon Musk responded, stating that he would be adding specifics to the plan in a later update. “Fair enough. Will add more specifics,” Musk wrote in his post.
Tesla has been following Elon Musk’s Master Plans for decades. The first Master Plan, released in 2006, outlined the company’s path from the original Tesla Roadster to the Model 3, as well as the first steps for Tesla Energy. Master Plan Part Deux, released in 2016, covered the ramp of Tesla Energy, the expansion of Tesla’s vehicle lineup, and the rollout of a Robotaxi service.
Master Plan Part 3 was more ambitious as it was generally an in-depth proposal for achieving a global sustainable entry economy by transitioning to electricity-powered vehicles, homes, and industry, which will, in turn, be powered by renewable energy sources like solar and wind. Master Plan Part 3 also included a five-step plan to accomplish this, allowing the world to transition to a fully electrified future.
Master Plan Part IV, which was released a few days ago, focused on automation and artificial intelligence to achieve sustainable abundance. But while the first two Master Plans were very clear and specific and Master Plan Part 3 was very in-depth, Master Plan Part IV was quite general and vague in comparison. It was easy to tell that Optimus would play a big role in the pursuit of sustainable abundance, but apart from that, there were no specifics as to how Tesla intended to achieve its goals.
Fortunately, these specifics would be discussed by Musk in a later update to the plan.
News
Tesla just had its best wholesale month this year in China
Tesla China’s wholesale figures include both vehicles that are sold domestically and exported abroad.

Tesla China just had its best wholesale month this 2025 so far. In August, the electric vehicle maker sold 83,192 vehicles wholesale, a 22.55% increase compared to July 2025’s 67,886 units.
Tesla China’s wholesale figures are still down year-over-year, but the company’s momentum seems notable, especially with the arrival of the Model Y L.
August 2025 figures
As noted in a CNEV Post report, August 2025’s 83,192 wholesale figures are 4.04% less than the 86,697 units that were sold in the same period last year. It is, however, a 22.55% improvement from the previous month. From January to August, Tesla China sold 515,552 units wholesale, a 12.24% year-over-year decrease.
It should be noted that Tesla China’s wholesale figures include both vehicles that are sold domestically and exported abroad. With this in mind, August’s results bode well for Tesla China, as it suggests that Gigafactory Shanghai is now hitting its pace with both its domestic deliveries and its exports. Giga Shanghai serves as Tesla’s primary vehicle export hub.
Model Y L factor
Tesla had a challenging first quarter this year, thanks in part to the changeover to the Model Y across the Fremont factory, Giga Texas, Giga Shanghai, and Giga Berlin-Brandenburg. This changeover resulted in low sales in the first quarter. Political controversies surrounding Elon Musk and violence against Tesla stores and vehicles in the first and second quarters in the United States and Europe did not help much either.
This Q3, however, Tesla seems to be hitting its stride, especially in China. The launch of the new Model Y L has allowed Tesla to compete in the six-seat, large SUV segment, a market that was previously closed to the standard Model Y. Reports have suggested that Tesla China has been seeing a lot of demand for the Model Y L, which should help the company achieve higher sales this quarter and the remaining months of the year.
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