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SpaceX rolls last Starship off the assembly line ahead of “major upgrades”

SpaceX's fourth full-size Starship prototype is effectively complete. (NASASpaceflight - bocachicagal)

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SpaceX has installed Starship serial number 11’s (SN11) steel nosecone, effectively completing the rocket and marking the end of production for a series of four virtually identical prototypes.

SpaceX has soared through a limited production run of four full-height Starship prototypes with a more or less frozen design, simultaneously serving as a pilot run for a nascent Starship assembly line while also producing high-fidelity prototypes for the program’s first high-altitude flight testing. Work on Starship SN8 – the first of those four prototypes – began around July 2020 when labeled hardware was first spotted.

Parts of SN9, SN10, SN11, and SN12 gradually started to appear over the next few months. Less than four months after production began, (half of) Starship SN8 rolled to the launch pad in late October to kick off a series of acceptance tests.

After an unusually long ~6 weeks of testing, SpaceX declared Starship SN8 ready for flight and ultimately pulled off a high-altitude launch that made it just a dozen or so seconds (~5%) away from a complete success – far further than anyone really expected. That surprising level of success appeared to lead SpaceX to reevaluate its plans and the strategic design of its test plans.

One result was observed in publicly-visible labels SpaceX uses to identify the dozens of Starship parts in work at any given moment: after SN12, only a few minor unfinished parts of SN13 and SN14 were ever spotted, departing from the flood of activity observed while building SN8 through SN11. In November, CEO Elon Musk revealed that “major upgrades” were planned for Starship SN15 and all subsequent prototypes.

The implication was that SpaceX had already written off no fewer than three Starships (SN8-SN10) to prove that a new, exotic approach to rocket landings could work as planned. If those three failed, SpaceX could likely use Starships SN11 through SN14 – likely enough prototypes to either succeed or conclude that a redesign is necessary. Ultimately, after Starship SN8’s spectacular success and last-second failure, SpaceX seemingly concluded that it was unlikely to need a full seven prototypes to achieve the first soft landing(s) and effectively killed Starships SN12, SN13, and SN14 in the cradle.

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On January 23rd, Starship SN12’s completed engine section was rather decisively scrapped before stacking had even begun. (NASASpaceflight – bocachicagal)

SpaceX likely concluded that SN8 had demonstrated that a vast majority of Starship’s existing design was already sound, reducing enough risk to confidently begin major upgrades – akin to building a more permanent structure only after ensuring that the foundation is stable. Indicating exactly that, SpaceX has already begun stacking Starship SN15 and has been churning out hardware for SN16, SN17, and SN18 for the last few months.

That ultimately means that one or more upgraded Starships will likely be ready to carry the torch forward as soon as SN10 and SN11 flight testing comes to an end – whether that means continuing recovery attempts or pushing the envelope higher and faster after the first successful soft landing(s).

The nature of those “upgrades” remains unclear beyond apparent fit-and-finish improvements and the possibility of a more easily manufacturable nosecone design, but it’s clear that things will become clearer far sooner than later at SpaceX’s current rate of progress.

SpaceX rolls Starship SN11 to the high bay for nose installation, February 5th.(NASASpaceflight – bocachicagal)
A worker prepares the top of SN11’s tank section for nose installation. (NASASpaceflight – bocachicagal)
Starship SN11’s assembly is effectively complete, likely meaning that the prototype will be ready to take over immediately if/when SN10 lands in less than one piece. (NASASpaceflight – bocachicagal)

Eric Ralph is Teslarati's senior spaceflight reporter and has been covering the industry in some capacity for almost half a decade, largely spurred in 2016 by a trip to Mexico to watch Elon Musk reveal SpaceX's plans for Mars in person. Aside from spreading interest and excitement about spaceflight far and wide, his primary goal is to cover humanity's ongoing efforts to expand beyond Earth to the Moon, Mars, and elsewhere.

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Tesla Cybercab and Robotaxi’s real advantage won’t be the ride service

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Concept art of a Tesla Cybercab in Las Vegas Strip as rendered via Grok

For a century, the car has asked the same thing of its owner, which is basically to pay attention. Even the best ride-hailing app like Uber or Lyft only moved the problem into someone else’s hands. You stopped driving, but you still sat in a stranger’s car, while half listening, and wondering whether to take a phone call in the car without being rude. The Cybercab has no wheel, no pedals and no driver. With Grok @bot now live inside it, it becomes something else entirely, and I think that matters more than the fleet count that everyone is tracking.

Grok @bot is an agent, not a voice assistant. A rider signs in once, and from then on can say what they need and watch it happen. Order dinner from a favorite restaurant. Fill the grocery cart. Move money, answer email, adjust a calendar, push a work project forward. Tesla engineer Yun-Ta Tsai confirmed it is enabled across every Cybercab and the rest of the Model Y fleet, and Tesla’s own pitch is that Full Self-Driving handles the commute while Grok handles the errands.

Think about what that does to a thirty minute ride. Uber sells you a trip, while Waymo sells you the same trip in a more private setting. Tesla is selling the thirty minutes themselves, returned to you with an assistant attached. Errands that used to eat a Saturday get done between pickup and drop off. The ride stops being dead time between two places and becomes a place of its own.

Tesla integrates Grok Bot into its vehicles for the ultimate personal assistant

Best of all, your Bots follow you into any Cybercab, and presumably your own Tesla, then logs you out automatically when you step out. Anyone can bolt a chatbot onto a screen, but much harder to own the vehicle, the autonomy stack and the assistant at once. It also quietly ties SpaceX’s Super Intelligence business to Tesla’s fleet, after Tesla converted its xAI stake into SpaceX equity. The relationship between those two companies is getting harder to describe as separate.

This is also where the hard questions start, because an agent that can spend your money in a vehicle other people also ride in needs some answers. How does it handle a voice it shouldn’t trust? What gets recorded, who can see it, and for how long? What happens when a rider leaves halfway through a task?

If Tesla gets those answers right, the scoreboard changes. We have been counting Cybercabs and wait times. The more telling number may be what riders accomplish per trip. That is data almost no one else will ever have, and it is the real reason to watch Grok @bot.

What do you think? Leave me a comment.

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Why Elon Musk’s target date for buying an Optimus robot is harder than it sounds

Musk says China’s magnet export ban cost Optimus months, and robot hands remain shockingly hard.

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Concept rendering of Tesla Optimus in mass production

Elon Musk says China’s export curbs on magnets used in electric motors set back Tesla’s Optimus program by two to three months, and that the robot’s hands remain the hardest part of the project. He made the comments Saturday during a live interview with Tesla Owners Silicon Valley at the X Takeover event at Giga Texas, in front of roughly 2,000 attendees. The Optimus discussion begins around the 49 minute mark of the stream.

On the hands, Musk was blunt and noted that a general purpose humanoid needs fine motor skills that are “incredibly difficult to get right. Shockingly difficult,” he said in the interview. He pointed to a problem he says no one has demonstrated yet: “One of the hardest things also generally is to do precision and force at the same time,” such as driving a small self tapping screw into wood. Touch sensors add another layer, since it is “actually kind of hard to get touch sensors that elastically deform and can handle high cycle life and it won’t just break after a few thousand cycles.”

He also took aim at rival robot videos. “Any complicated looking robot demo, it’s a canned demo. It’s not real,” Musk said, adding that real AI means showing a robot something it has never seen and watching it still cope, the way FSD handles a city it has never driven.

Musk expects the Optimus ramp to be slower than a new vehicle production ramp. “The initial part of that S curve of production ramp is going to be very slow at the beginning,” Musk said, partly because “unlike cars, there’s no pre existing supply chain for robot stuff.” That echoes his July reply on X that Optimus production “will be extremely slow at first, as everything is new.”

The magnet disclosure puts a number on a problem Musk first raised in 2025. He said China “prevented the export of magnets for use in electric motors” and that it “set back the Optimus program by like two or three months.” Then he added: “We had robots with no arms.” Tesla’s fix is to bring the supply chain home. “You’ve got to be able to make all the parts domestically,” he said. Teslarati reported in April 2025 that Musk tied the issue to permanent magnets in the arm actuators, where motors have to be as small as possible.

Tesla Optimus V3 hand and arm details revealed in new patents

Production is moving regardless, with a reported internal goal of more than 1,000 a week by the end of 2026. Teslarati recently covered how Tesla is certifying supply partners in China for Optimus parts, while the company’s hand design has been the subject of new patent filings.

Musk has said he wants Optimus available to the public by late 2027, though Tesla has not confirmed that date or published updated production figures.

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Investor's Corner

Elon Musk drops a Thanksgiving hint about Starship’s biggest test yet

Elon Musk says Starship Flight 15 will try to catch the ship itself, a first.

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Elon Musk says SpaceX’s next Starship flight will try something nobody has done before, by catching the ship itself. Speaking to roughly 2,000 people at the X Takeover event at Giga Texas on Saturday, Musk said Flight 15 is about four to six weeks away and “probably launches a little bit before Thanksgiving, is my guess.”

That is a slip from earlier reporting, which had pointed to a launch as early as October 19. Musk explained why the date keeps moving. “We’re making a bunch of improvements to the rocket between every flight,” he said, adding that there are often hundreds, sometimes thousands, of small changes. This time the list is short, “but some of them take a fair bit of work and we’ve got to go inside the tank to make some of these changes.”

“We’re going to try to catch the ship, which is a super big deal,” Musk said. “If we do so, that’ll be the first time that there’s been full recovery of an orbital class rocket.” SpaceX has already caught the Super Heavy booster with the tower’s mechanical arms, and has talked about catching the ship since late 2025, but the upper stage has never been caught.

Musk also laid out what comes after. “The next big milestone would be to refly both the booster and the ship,” he said, describing a Flight 16 where “all parts of an orbital rocket are reflown.”

The reason SpaceX wants this comes down to cost and cadence. Every Starship ship so far has ended its flight in the ocean, and SpaceX expects most of those water landings to end in fireballs. A ship that returns to Starbase intact can be inspected and flown again. SpaceX’s IPO filing, says Starship V3 is designed to deliver 100 metric tons to orbit in a fully reusable configuration, that SpaceX aims to cut the cost to reach orbit by 99% or more versus the historical average, and that tower catches should allow “multiple launches per day.”

The payoff goes beyond cheaper launches. The next generation Starlink V3 satellites are too large for Falcon 9 and can only fly on Starship, which can carry up to 60 per flight. Flight 14 on September 28 deployed the first 26 of them after Starship reached orbit despite an early engine shutdown, as Teslarati reported. Musk blamed engine computer software, and said the heat shield “was extremely robust,” which he claimed in August had solved Starship’s biggest challenge.

NASA’s Moon plans depend on the same capability. NASA’s inspector general has described a lander mission that needs a propellant depot in low Earth orbit and more than 10 tanker flights, with SpaceX targeting one tanker launch every six days. That schedule only works if ships and boosters come back fast and fly again. Also, ship to ship propellant transfer has not been attempted yet.

One interesting hurdle yet to be explored is bringing the ship back to the launch site, with reentry over land, which will undoubtedly come with a lot of aviation safety reviews.

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