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SpaceX’s fourth Starship prototype has begun to take shape in Florida

In the center of this image, atop a newly-constructed metal-framework mount, is likely the first steel ring of Starship's Mk4 prototype. (John Winkopp - Seamore Holdings)

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SpaceX’s Florida Starship team appears to have taken the first step towards assembling Starship Mk4, the fourth full-scale prototype of the next-generation spaceship.

Although SpaceX’s Boca Chica, Texas Starship campus is undeniably in the lead with their first prototype, Starship Mk1, it appears that the company’s Florida campus is far ahead of Texas with their second Starship prototype.

At the moment, SpaceX has set up two separate Starship build teams in Florida and Texas with the intention of creating a sort of internal competition to see which group’s Starships are first to flight and first to orbit. For the most part, it’s assumed that this “competition” is less a fight to the finish line than it is an A/B test, a common software development practice in which separate teams pursue different methods of achieving the same goals.

In the likely event that SpaceX is performing a radical form of A/B testing with rocket prototypes, both teams are continuously sharing best-practices and lessons-learned as they work to find the best possible methods for fabricating hardware and assembling Starships. Nevertheless, in A/B testing, fundamentally different approaches also tend to result in development schedules and final products that are unique, even if the end results are similar.

In the context of Starship, this is exactly what can be observed at SpaceX’s Florida and Texas facilities. Similarities abound in the radical method of en plein air manufacturing being implemented, while the Starship Mk1 and Mk2 hardware being built and assembled are also relatively similar, even if they have some distinct characteristics.

For example, it’s been observed that Starship Mk2 has almost certainly been constructed out of steel rings that are significantly taller than those used to assemble Starship Mk1. Taller rings meant that Mk2 needed fewer overall rings to reach the same height as Mk1, a fact that likely contributed to the impressive speed with which SpaceX’s Florida team was able to stack and weld most of Starship Mk2’s aerostructure.

Star(ship)fleet

According to SpaceX CEO Elon Musk, those similarities (and slight differences) are likely to continue for at least several more generations of prototypes. At a September 28th presentation and update on Starship, Musk revealed his opinion that Starship could be ready for its first orbital test flight(s) as few as six months from then – sometime in Q2 2020, give or take. To get there, Musk estimated that at least 5-6 Starship prototypes would need to be built in the interim.

Starship Mk3 will be built in Texas – in fact, the first ‘seamless’ steel ring may have already been fabricated at SpaceX’s Boca Chica facilities. According to Musk, Starship Mk4 will be SpaceX Cocoa’s second prototype. Based on John Winkopp’s October 17th drone overview, it appears that SpaceX’s Florida team has mounted the first steel Starship Mk4 ring atop a new work mount, potentially marking the start of Starship Mk4 assembly.

Although it’s unclear if this is a proof of concept or something more substantial, what could be the first seamless steel ring of Starship’s Mk3 prototype has already been bent into shape in Boca Chica, Texas. (NASASpaceflight – bocachicagal)

SpaceX’s Texas team has prepared at least one full-scale sample of a single-weld (‘seamless’) steel ring, perhaps the start of Mk1’s successor, Starship Mk3. Meanwhile, SpaceX Cocoa – seemingly at some kind of impasse with the final integration and assembly of Starship Mk2 – has churned out a huge number of similarly smooth steel rings, to the extent that Teslarati previously (and incorrectly) surmised that the first Super Heavy booster was being fabricated.

During Musk’s September 28th presentation, he effectively confirmed that the almost two-dozen steel rings hanging out on SpaceX’s Cocoa, Florida campus were almost certainly the beginnings of Starship Mk4. However, given the sheer number of rings present (23), the reality is that what could be the entirety of Starship Mk4’s cylindrical tank and thrust structure section is probably sitting outside in Florida, waiting to be stacked. Altogether, those 23 rings could reach a height of more than 40m (130 ft), potentially more than is actually needed for a Starship tank section.

Of note, it’s been observed that SpaceX’s Florida campus has begun stacking individual Mk4 rings into dual-ring assemblies, potentially halving the amount of welding that will have to be done once stacking begins in earnest. (John Winkopp – Seamore Holdings, LLC)

Last but not least, local photographer and spaceflight fan Jon Van Horne captured what looks like a new Starship tank dome in work at SpaceX’s prospective Kennedy Space Center (KSC) build site, known as Roberts Rd. Given that Starship Mk2 already has two domes installed and a third and final dome staged and ready for installation, this fourth dome is very likely the first for Starship Mk4.

https://twitter.com/therealjonvh/status/1183176543914336258

In short, SpaceX’s Florida team is probably weeks ahead of Boca Chica in the process of building a second full-scale Starship prototype. Of course, the ultimate winner of this mock competition isn’t Florida or Texas, it’s SpaceX’s Starship program as a whole.

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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 gives its biggest hint that Full Self-Driving in Europe is imminent

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Credit: BLKMDL3 | X

Tesla has given its biggest hint that Full Self-Driving in Europe is imminent, as a new feature seems to show that the company is preparing for frequent border crossings.

Tesla owner and influencer BLKMDL3, also known as Zack, recently took his Tesla to the border of California and Mexico at Tijuana, and at the international crossing, Full Self-Driving showed an interesting message: “Upcoming country border — FSD (Supervised) will become unavailable.”

Due to regulatory approvals, once a Tesla operating on Full Self-Driving enters a new country, it is required to comply with the laws and regulations that are applicable to that territory. Even if legal, it seems Tesla will shut off FSD temporarily, confirming it is in a location where operation is approved.

This is something that will be extremely important in Europe, as crossing borders there is like crossing states in the U.S.; it’s pretty frequent compared to life in America, Canada, and Mexico.

Tesla has been working to get FSD approved in Europe for several years, and it has been getting close to being able to offer it to owners on the continent. However, it is still working through a lot of the red tape that is necessary for European regulators to approve use of the system on their continent.

This feature seems to be one that would be extremely useful in Europe, considering the fact that crossing borders into other countries is much more frequent than here in the U.S., and would cater to an area where approvals would differ.

Tesla has been testing FSD in Spain, France, England, and other European countries, and plans to continue expanding this effort. European owners have been fighting for a very long time to utilize the functionality, but the red tape has been the biggest bottleneck in the process.

Tesla Europe builds momentum with expanding FSD demos and regional launches

Tesla operates Full Self-Driving in the United States, China, Canada, Mexico, Puerto Rico, Australia, New Zealand, and South Korea.

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SpaceX Starship V3 gets launch date update from Elon Musk

The first flight of Starship Version 3 and its new Raptor V3 engines could happen as early as March.

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Credit: SpaceX/X

Elon Musk has announced that SpaceX’s next Starship launch, Flight 12, is expected in about six weeks. This suggests that the first flight of Starship Version 3 and its new Raptor V3 engines could happen as early as March.

In a post on X, Elon Musk stated that the next Starship launch is in six weeks. He accompanied his announcement with a photo that seemed to have been taken when Starship’s upper stage was just about to separate from the Super Heavy Booster. Musk did not state whether SpaceX will attempt to catch the Super Heavy Booster during the upcoming flight.

The upcoming flight will mark the debut of Starship V3. The upgraded design includes the new Raptor V3 engine, which is expected to have nearly twice the thrust of the original Raptor 1, at a fraction of the cost and with significantly reduced weight. The Starship V3 platform is also expected to be optimized for manufacturability. 

The Starship V3 Flight 12 launch timeline comes as SpaceX pursues an aggressive development cadence for the fully reusable launch system. Previous iterations of Starship have racked up a mixed but notable string of test flights, including multiple integrated flight tests in 2025.

Interestingly enough, SpaceX has teased an aggressive timeframe for Starship V3’s first flight. Way back in late November, SpaceX noted on X that it will be aiming to launch Starship V3’s maiden flight in the first quarter of 2026. This was despite setbacks like a structural anomaly on the first V3 booster during ground testing.

“Starship’s twelfth flight test remains targeted for the first quarter of 2026,” the company wrote in its post on X. 

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Tesla China rolls out Model 3 insurance subsidy through February

Eligible customers purchasing a Model 3 by February 28 can receive an insurance subsidy worth RMB 8,000 (about $1,150).

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Credit: Tesla Malaysia/X

Tesla has rolled out a new insurance subsidy for Model 3 buyers in China, adding another incentive as the automaker steps up promotions in the world’s largest electric vehicle market.

Eligible customers purchasing a Model 3 by February 28 can receive an insurance subsidy worth RMB 8,000 (about $1,150).

A limited-time subsidy

The insurance subsidy, which was announced by Tesla China on Weibo, applies to the Model 3 RWD, Long Range RWD, and Long Range AWD variants. Tesla stated that the offer is available to buyers who complete their purchase on or before February 28, as noted in a CNEV Post report. The starting prices for these variants are RMB 235,500, RMB 259,500, and RMB 285,500, respectively.

The Tesla Model 3 Performance, which starts at RMB 339,500, is excluded from the subsidy. The company has previously used insurance incentives at the beginning of the year to address softer seasonal demand in China’s auto market. The program is typically phased out as sales conditions stabilize over the year.

https://twitter.com/tslaming/status/2015608966206890016?s=20

China’s electric vehicle market

The insurance subsidy followed Tesla’s launch of a 7-year low-interest financing plan in China on January 6, which is aimed at improving vehicle affordability amid changing policy conditions. After Tesla introduced the financing program, several automakers, such as Xiaomi, Li Auto, Xpeng, and Voyah, introduced similar long-term financing options.

China’s electric vehicle market has faced additional headwinds entering 2026. Buyers of new energy vehicles are now subject to a 5% purchase tax, compared with the previous full exemption. At the same time, vehicle trade-in subsidies in several cities are expected to expire in mid-November.

Tesla’s overall sales in China declined in 2025, with deliveries totaling 625,698 vehicles, down 4.78% year-over-year. Model 3 deliveries increased 13.33% to 200,361 units, while Model Y deliveries, which were hampered by the changeover to the new Model Y in the first quarter, fell 11.45% to 425,337 units.

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