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SpaceX preparing for third Starship ‘full stack’

Booster 4 and Ship 20 - March 13th, 2022. (NASASpaceflight - bocachicagal)

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SpaceX appears to be preparing Starship 20 and Super Heavy Booster 4 for their third ‘full stack’ demonstration after two seemingly successful tests in August 2021 and February 2022.

The first, completed in early August 2021, was mostly for show and saw SpaceX stack the unfinished prototypes with a giant crane – fighting the coastal winds throughout. After just a few hours stacked, Ship 20 was removed and returned to Starbase, where workers spent several more weeks (mostly) finishing the prototype. Booster 4 followed suit several weeks later and ultimately took another three months of work to reach some level of test readiness.

After Ship 20 and Booster 4 completed a series of tests in the last few months of 2021 and early 2022, the two were re-stacked in mid-February – once again for show. This time, the stacked Starship served as a backdrop for SpaceX CEO Elon Musk’s first official Starship presentation in more than two years. However, despite the fact that neither prototype was actually tested during the second stack, SpaceX did use the opportunity to partially debut Starbase’s ‘orbital launch integration tower’ and used that towers trio of giant arms to lift, stack, and stabilize Starship S20 on top of Super Heavy B4.

The first stack. (SpaceX)
Stack #2.

Ship 20 was ‘destacked’ with the tower’s arms just a few days after Musk’s event – an undeniably rapid and impressive achievement for the first real use of the ‘chopstick’ arms but still far from demonstrating that Ship 20, Booster 4, or the orbital launch site (OLS) are ready for orbital test flights. Since then, however, Starbase’s launch facilities have admittedly been almost as busy as they’ve ever been with Starship and Super Heavy cryoproof tests.

Ship 20 completed its first basic OLS cryogenic proof test or ‘cryoproof’ just two days after it was destacked. Additional Starship S20 cryoproofs followed on February 17th (the day after), February 22nd, and March 3rd. Super Heavy B4 completed its own cryoproofs on February 18th and March 1st, the latter of which may have actually been the fullest a Starship booster has ever been filled. All told, SpaceX completed no less than six major B4/S20 cryoproof tests in 15 days.

https://twitter.com/NASASpaceflight/status/1494100158761648128

Crucially, all six cryoproofs were performed with Starbase’s nascent orbital tank farm, thoroughly testing its storage and distribution capabilities. Additionally, because SpaceX began liquid methane deliveries on February 13th, some of those tests – particularly with Ship 20 – may have even been proper wet dress rehearsals, meaning that SpaceX may have filled the rocket(s) with liquid methane (LCH4) and liquid oxygen (LOx) propellant to replicate preparations for a real launch.

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At a minimum, Super Heavy Booster 4’s oxidizer tank was fully filled with liquid oxygen – and possibly pressurized with hot gaseous oxygen – during its March 1st cryoproof, while its fuel tank was filled about two-thirds of the way either with liquid nitrogen (LN2) or methane. Prior to its February and March tests, Booster 4 had already completed three cryoproofs – some also using LOx – in December 2021. Ship 20 had completed a cryoproof and four static fire tests.

A six-engine Ship 20 static fire. (SpaceX)

All told, short of finally performing a full Super Heavy wet dress rehearsal and static fire at the orbital launch site, it’s not all that clear what more SpaceX can derive from additional individual cryoproof testing of Ship 20 or Booster 4. Several things do still need to be demonstrated, however. First, the OLS launch tower has yet to use its arms to remotely install a Super Heavy on the orbital launch mount. More importantly, SpaceX has yet to use the launch tower and its swinging ship umbilical arm to cryoproof or fuel a Starship while stacked on top of a Super Heavy. Finally, SpaceX has also yet to simultaneously perform a cryoproof or wet dress rehearsal test of a stacked Starship and Super Heavy, which will be necessary for orbital test flights.

One or several of those to-be-completed tests may be why SpaceX appears to have begun preparing to install Ship 20 on top of Booster 4 for the third time. On March 14th, Starship S20 was moved towards the launch tower and on March 15th, the ship was slotted between its ‘chopstick’ arms. Based on stack #2, the ship could be lifted at any point – day or night – and installed on top of Super Heavy in a matter of hours.

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 shares epic 2025 recap video, confirms start of Cybercab production

The cinematic montage, posted by the official Tesla account on X, celebrated the company’s progress in EVs, energy, and Robotaxi development.

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Credit: Tesla

Tesla has released an epic year-in-review video for 2025, recapping some of its major achievements from refreshed models to autonomy breakthroughs and production ramps. 

The cinematic montage, posted by the official Tesla account on X, celebrated the company’s progress in EVs, energy, and Robotaxi development while looking ahead to an even bigger 2026.

Tesla’s 2025 highlights recap

Tesla has had a busy 2025, as highlighted in the recap video. The video opened with Elon Musk explaining the company’s pursuit of sustainable abundance. A number of milestones were then highlighted, such as the rollout of FSD v14, Optimus’ numerous demos, the opening of the Tesla Diner in Hollywood, LA, the completion of the world’s first autonomous car delivery, and the launch of the Robotaxi network in Austin and the San Francisco Bay Area.

Tesla also highlighted several of its accomplishments over the year. As per the company, the Model Y was the year’s best-selling vehicle globally again, and Teslas became more affordable than ever thanks to the Model 3 and Model Y Standard. Other key models were also rolled out, such as the refreshed Model S and X, as well as the new Model Y, the new Model Y Performance, and the six-seat, extended wheelbase Model Y L. 

The Megablock was also unveiled during the year, and the Supercharger Network grew by 18%. Over 1 million Powerwalls were also installed during the year, and the Cybertruck became the first EV truck to get both an IIHS Top Safety Pick+ award and an NHTSA 5-Star safety rating. 

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Cybercab production confirmed

Interestingly enough, Tesla also confirmed in its 2025 recap video that the production of the Cybercab has started. This bodes well for the vehicle, as it could result in the vehicle really being mass-produced in the first half of 2026. Elon Musk confirmed during the 2025 Annual Shareholder Meeting that Cybercab production should earnestly start around April 2026

Musk has also noted that the Cybercab will be Tesla’s highest-volume vehicle yet, with the company aiming for an annual production rate of about 2 million units. “If you’ve seen the design of the Cybercab line, it doesn’t look like a normal car manufacturing line,” Musk said earlier this year. “It looks like a really high-speed consumer electronics line. In fact, the line will move so fast that actually people can’t even get close to it.”

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Tesla Cybercab is changing the look of Austin’s roads, and it’s not even in production yet

Videos and photos showed the sleek, two-seat autonomous vehicles navigating traffic.

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Credit: @niccruzpatane/X

Even before entering production, Tesla’s Cybercab is already transforming the appearance of Austin’s streets, with multiple prototypes spotted testing in downtown areas recently. 

Videos and photos showed the sleek, two-seat autonomous vehicles navigating traffic. Interestingly enough, the vehicles were equipped with temporary steering wheels and human safety drivers.

Recent Cybercab sightings

Over the weekend, enthusiasts captured footage of two Cybercabs driving together in central Austin, their futuristic silhouettes standing out amid regular traffic. While the vehicles featured temporary steering wheels and side mirrors for now, they retained their futuristic, production-intent exterior design.

Industry watcher Sawyer Merritt shared one of the vehicles’ videos, noting the increasing frequency of the autonomous two-seater’s sightings.

Previewing the autonomous future

Sightings of the Cybercab have been ramping in several key areas across the United States in recent weeks. Sightings include units at Apple’s Visitor Center in California, the Fremont factory test track, and in Austin’s streets.

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The increased activity suggests that Tesla is in overdrive, validating the autonomous two-seater ahead of its planned volume production. Elon Musk confirmed at the 2025 Shareholder Meeting that manufacturing begins around April 2026 with ambitious targets, and during an All-Hands meeting earlier this year, Musk hinted that ultimately, Tesla’s factories should be able to produce one Cybercab every 10 seconds. 

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Tesla celebrates 9 million vehicles produced globally

The achievement, announced by Tesla Asia on X, celebrated not just the Shanghai team’s output but the company’s cumulative production across all its factories worldwide.

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Credit: Tesla Asia/X

Tesla has achieved a new milestone, rolling out its nine millionth vehicle worldwide from Giga Shanghai. 

The achievement, announced by Tesla Asia on X, celebrated not just the Shanghai team’s output but the company’s cumulative production across all its factories worldwide. The milestone came as 2025 drew to a close, and it inspired praise from some of the company’s key executives.

Tesla’s 9 million vehicle milestone

The commemorative photo from Tesla Asia featured the Giga Shanghai team assembled on the factory floor, surrounding the milestone Model Y unit, which looked pristine in white. The image was captioned: “Our 9 millionth vehicle globally has just rolled off the production line at Giga Shanghai. Thanks to our owners and supporters around the world.” 

Senior Vice President of Automotive Tom Zhu praised Tesla’s factory teams for the remarkable milestone. He also shared his gratitude to Tesla owners for their support. “Congrats to all Tesla factories for this amazing milestone! Thanks to our owners for your continued support!” Zhu wrote in a post on X.

Giga Shanghai’s legacy

Tesla’s nine million vehicle milestone is especially impressive considering that just 207 days ago, the company announced that it had built its eight millionth car globally. The eight millionth Tesla, a red Model Y, was built in Giga Berlin. The fact that Tesla was able to build a million cars in less than seven months is quite an accomplishment. 

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Giga Shanghai, Tesla’s largest factory by volume, has been instrumental to the company’s overall operations, having reached four million cumulative vehicles earlier in 2025. The plant produces Model 3 and Model Y for both domestic Chinese and export markets, making it the company’s primary vehicle export hub. 

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