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SpaceX CEO Elon Musk says Starship could be followed by a dramatically larger rocket
Hinted at in a brief tweet on August 28th, SpaceX CEO Elon Musk says that SpaceX’s massive Starship and Super Heavy launch vehicle – set to be the most powerful rocket ever built upon completion – could eventually be followed by a rocket multiple times larger.
SpaceX is currently in the process of assembling the first full-fidelity prototypes of Starship, a 9m (30 ft) diameter, 55m (180 ft) tall reusable spacecraft and upper stage. Two prototypes – Mk1 and Mk2 – are simultaneously being built in Texas and Florida, respectively, while the beginnings of the first Super Heavy prototype has visibly begun to take shape at SpaceX’s Florida campus.
Once complete, Starship’s Super Heavy booster will be the single most powerful rocket booster ever built, standing at least 70m (230 ft) tall on its own and capable of producing as much as ~90,000 kN (19,600,000 lbf) of thrust with 30 250-ton-thrust and 7 200-ton-thrust Raptor engines installed. Assuming 31 throttleable 200-ton Raptors, Super Heavy’s minimum max thrust is a still record-breaking ~62,000 kN (13.7 million lbf).
In fewer words, a full Starship/Super Heavy ‘stack’ would be the tallest (~118m/390ft), heaviest (~5000 tons/11 million lbs), and most powerful rocket ever assembled.
And yet, despite its size, orbital-class rocketry in Earth gravity will almost never fail to benefit from more thrust; more propellant; more rocket. In light of this, CEO Elon Musk says that a theoretical next- next-generation SpaceX rocket – to potentially follow some years after Starship and Super Heavy – could be a full 18m (60 ft) wide, twice the diameter of its predecessors.
Many will recollect that doubling the diameter of a circle quadruples its area. Add in a doubling of height and a theoretical Starship 2.0 would have eight times the surface area and eight times the propellant tank volume, requiring roughly eight times as much thrust and making the vehicle eight times as heavy as Starship 1.0. Assuming that Starship’s successor retains its fineness ratio (height/width), an unlikely end result but still interesting to ponder, the vehicle would measure 18m (60 ft) in diameter and a terrifying ~236m (780 ft) tall, literally more than twice as tall as Saturn V. An 18m diameter would also make it the widest rocket ever built, with Saturn V’s S-IC first stage measuring 10m wide and the Soviet Union’s N1 ‘Block A’ first stage measuring an impressive ~17m in diameter at its widest point.
If the above assumptions are correct, a very rough estimate would peg Starship 2.0’s gross (fueled) mass at a gobsmacking ~40,000 metric tons (~90 million pounds). In the unlikely event that SpaceX would use the current generation of Raptor to power such a colossal rocket, the booster would need a bare minimum of 100+ Raptors just to lift off at all. Using Saturn V’s F-1, still the most powerful single-chamber rocket engine ever built, Starship 2.0 would need a minimum of 60+ engines to lift off.
For the time being, Starship and Super Heavy are plenty ambitious on their own, but it’s unsurprising to hear that SpaceX CEO Elon Musk already has some thoughts on what could follow that next-generation launch vehicle in the new decade. Still, it’s worth noting that quite possibly the craziest aspect of Starship – SpaceX’s utterly non-traditional attempt at rewriting the book on rocket manufacturing – could eventually make an 18m-diameter vehicle far more practical, assuming the company proves it’s methods can be used to build reliable, high-performance rockets.
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Tesla debuts hands-free Grok AI with update 2025.26: What you need to know
All new Tesla vehicles delivered on or after July 12, 2025, will include Grok AI out of the box
Tesla has begun rolling out Grok, an in-car conversational AI assistant developed by xAI, to eligible vehicles starting July 12. The feature marks the most direct integration yet between Elon Musk’s artificial intelligence startup and Tesla’s consumer product lineup, offering drivers hands-free access to a chat-style companion while on the road.
Grok comes pre-installed on new vehicles
According to Tesla’s FAQ page for the feature, all new vehicles delivered on or after July 12, 2025, will include Grok AI out of the box. Owners of older vehicles may gain access through an over-the-air update, provided their vehicle meets a few hardware and software requirements.
Specifically, Grok is currently only supported on Tesla models equipped with an AMD infotainment processor and running vehicle software version 2025.26 and higher. Compatible models include the Model S, Model 3, Model X, Model Y, and Cybertruck. A Premium Connectivity subscription or active Wi-Fi connection is also required.
Tesla notes that additional vehicle compatibility may arrive in future software updates.
Grok’s features and limitations for now
Drivers can engage with Grok using the App Launcher or by pressing and holding the voice command button on the steering wheel. Grok is designed to answer questions and hold conversations using natural language, offering responses tailored to its chosen personality—ranging from “Storyteller” to the more eccentric “Unhinged.”
For fun, Tesla posted a demonstration of Grok likely running on “Unhinged” talking about what it would do to Optimus when they are on a date, much to the shock of the humanoid robot’s official social media account.
It should be noted, however, that Grok cannot currently issue commands to the vehicle itself, at least for now. Traditional voice commands for tasks like climate control, navigation, or media remain separate from Grok as of writing.
The feature is being released in Beta and does not require a Grok account or xAI subscription to activate, although that policy may change over time.
Grok privacy and in-car experience
Tesla emphasizes that interactions with Grok are securely processed by xAI and not linked to a user’s Tesla account or vehicle. Conversations remain anonymous unless a user signs into Grok separately to sync their history across devices.
Tesla has also begun promoting Grok directly on its official vehicle webpages, showcasing the feature as part of its in-car experience, further highlighting the company’s increasing focus on AI and infotainment features on its all-electric vehicles.
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Tesla cleared in Canada EV rebate investigation
Tesla has been cleared in an investigation into the company’s staggering number of EV rebate claims in Canada in January.
Canadian officials have cleared Tesla following an investigation into a large number of claims submitted to the country’s electric vehicle (EV) rebates earlier this year.
Transport Canada has ruled that there was no evidence of fraud after Tesla submitted 8,653 EV rebate claims for the country’s Incentives for Zero-Emission Vehicles (iZEV) program, as detailed in a report on Friday from The Globe and Mail. Despite the huge number of claims, Canadian authorities have found that the figure represented vehicles that had been delivered prior to the submission deadline for the program.
According to Transport Minister Chrystia Freeland, the claims “were determined to legitimately represent cars sold before January 12,” which was the final day for OEMs to submit these claims before the government suspended the program.
Upon initial reporting of the Tesla claims submitted in January, it was estimated that they were valued at around $43 million. In March, Freeland and Transport Canada opened the investigation into Tesla, noting that they would be freezing the rebate payments until the claims were found to be valid.
READ MORE ON ELECTRIC VEHICLES: EVs getting cleaner more quickly than expected in Europe: study
Huw Williams, Canadian Automobile Dealers Association Public Affairs Director, accepted the results of the investigation, while also questioning how Tesla knew to submit the claims that weekend, just before the program ran out.
“I think there’s a larger question as to how Tesla knew to run those through on that weekend,” Williams said. “It doesn’t appear to me that we have an investigation into any communication between Transport Canada and Tesla, between officials who may have shared information inappropriately.”
Tesla sales have been down in Canada for the first half of this year, amidst turmoil between the country and the Trump administration’s tariffs. Although Elon Musk has since stepped back from his role with the administration, a number of companies and officials in Canada were calling for a boycott of Tesla’s vehicles earlier this year, due in part to his association with Trump.
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Tesla Semis to get 18 new Megachargers at this PepsiCo plant
PepsiCo is set to add more Tesla Semi Megachargers, this time at a facility in North Carolina.
Tesla partner PepsiCo is set to build new Semi charging stations at one of its manufacturing sites, as revealed in new permitting plans shared this week.
On Friday, Tesla charging station scout MarcoRP shared plans on X for 18 Semi Megacharging stalls at PepsiCo’s facility in Charlotte, North Carolina, coming as the latest update plans for the company’s increasingly electrified fleet. The stalls are set to be built side by side, along with three Tesla Megapack grid-scale battery systems.
The plans also note the faster charging speeds for the chargers, which can charge the Class 8 Semi at speeds of up to 1MW. Tesla says that the speed can charge the Semi back to roughly 70 percent in around 30 minutes.
You can see the site plans for the PepsiCo North Carolina Megacharger below.
Credit: PepsiCo (via MarcoRPi1 on X)
Credit: PepsiCo (via MarcoRPi1 on X)
READ MORE ON THE TESLA SEMI: Tesla to build Semi Megacharger station in Southern California
PepsiCo’s Tesla Semi fleet, other Megachargers, and initial tests and deliveries
PepsiCo was the first external customer to take delivery of Tesla’s Semis back in 2023, starting with just an initial order of 15. Since then, the company has continued to expand the fleet, recently taking delivery of an additional 50 units in California. The PepsiCo fleet was up to around 86 units as of last year, according to statements from Semi Senior Manager Dan Priestley.
Additionally, the company has similar Megachargers at its facilities in Modesto, Sacramento, and Fresno, California, and Tesla also submitted plans for approval to build 12 new Megacharging stalls in Los Angeles County.
Over the past couple of years, Tesla has also been delivering the electric Class 8 units to a number of other companies for pilot programs, and Priestley shared some results from PepsiCo’s initial Semi tests last year. Notably, the executive spoke with a handful of PepsiCo workers who said they really liked the Semi and wouldn’t plan on going back to diesel trucks.
The company is also nearing completion of a higher-volume Semi plant at its Gigafactory in Nevada, which is expected to eventually have an annual production capacity of 50,000 Semi units.
Tesla executive teases plan to further electrify supply chain
Tesla debuts hands-free Grok AI with update 2025.26: What you need to know
Tesla cleared in Canada EV rebate investigation
Tesla Semis to get 18 new Megachargers at this PepsiCo plant
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