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SpaceX’s first high-altitude Starship a week away from completion, says Elon Musk
CEO Elon Musk says that SpaceX’s first high-altitude Starship prototype – built entirely out of a new steel alloy – will be fully assembled “about a week” from now.
On August 4th, SpaceX successfully hopped a full-scale Starship prototype (serial number 5 or SN5) for the first time, reaching the same 150m (~500 ft) apogee Starhopper soared to just shy of one year prior. On September 3rd, just 30 days later, Starship SN6 – an entirely different full-scale prototype with a different Raptor engine – completed an identical 150m hop, though Musk noted that it was “a much smoother & faster operation.” Indeed, the whole purpose of performing the same hop with two nearly identical ships was to develop and optimize the nascent process of Starship flight testing.
Musk’s indication that “several” short hops would be performed strongly implied that SN5, SN6, or both ships would fly a second time. Now, though, Musk – supported by a NASASpaceflight.com report – appears to be suggesting that the first high-altitude Starship (SN8) is up next on the docket.
According to NASASpaceflight, SpaceX is now working towards the first high-altitude launch of Starship SN8 as early as October. Prior to that ambitious test flight, though, several critical milestones stand in the way. Unmentioned, Starship test tank SN7.1 may be hours away from kicking off a cryogenic stress test crucial to the future of Starship SN8 and several of its successors. Built out of a steel alloy that is somewhat more ductile and pliable at cryogenic temperatures, a successful SN7.1 stress test would open the door for SN8 – the first full-scale prototype built out of the same new alloy – to begin testing immediately thereafter.
As with all tests, though, failure is a strong possibility and would likely require more analysis of the new steel alloy and some level of redesign for several affected Starship components. In that event, Starship SN8 would likely serve as a test tank instead of becoming the first high-altitude flight article. SN7.1’s trials are set to begin no earlier than (NET) 9pm CDT (UTC-5) on September 14th and could continue all the way up to September 23rd.
Meanwhile, SpaceX is working around the clock to outfit Starship SN8 and prepare the ship for the installation of a nosecone section and four aerodynamic control surfaces known as flaps. Unlike Starship Mk1, which was temporarily outfitted with flaps and a nosecone more as a full-size mockup than a flight article, there is a very real chance that Starship SN8 will actually perform a flight test with its nose and flaps installed.
Unlike the Space Shuttle or other proposed spaceplanes, SpaceX’s current Starship design incorporates flaps to ensure aerodynamic stability while free-falling belly-first through the atmosphere, akin to a skydiver using arms and legs to steer through the air.
If Musk’s schedule is accurate, Starship SN8 could be fully outfitted with a nosecone and flaps and ready to roll to the launch pad for testing as early as next week. Prior to the first 20 km (~12.5 mi) hop and skydiver-style landing attempt, Musk says that SpaceX will put SN8 through a static fire test (possibly the first with three Raptor engines). If it survives, the rocket will be carefully inspected before performing a second static fire test. If that second test is successful, SN8 will finally be cleared for Starship’s first high-altitude launch and landing attempt.
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Tesla Cybercabs narrowly miss deadly Amazon cargo plane crash
An Amazon cargo plane crash near Miami’s airport stopped feet from dozens of Tesla Cybercabs.
An Amazon Prime Air Boeing 767 cargo jet overran the runway at Miami International Airport on Sunday afternoon, killing five people and injuring five more. The jet, operated by North Carolina based carrier 21 Air as Flight 7598, touched down around 2 p.m. after arriving from San Juan, Puerto Rico, then crossed the airport perimeter, plowed across NW 67th Avenue and struck multiple vehicles before catching fire, according to the Associated Press.
Photos and video from the scene show the aircraft’s nose stopped within meters of a fenced staging lot holding dozens of gold painted Tesla Cybercabs, the steering wheel free robotaxi Tesla began putting on public roads in Austin last week. Miami-Dade Fire Rescue has confirmed the plane struck “multiple vehicles” but has not said whether any Cybercabs were among them, and neither Tesla nor airport officials have addressed the fleet directly.
The Cybercabs had not yet entered commercial service in Miami. Tesla’s existing Robotaxi operation there runs on modified Model Y vehicles and has been unsupervised since Ashok Elluswamy confirmed the detail on X in July.
Footage of the plane crash from earlier today | #ONLYinDADE pic.twitter.com/iGoOtnd6cD
— ONLY in DADE (@ONLYinDADE) September 6, 2026
Elon Musk offered the briefest of reactions. Replying to a Zero Hedge post about the Cybercabs sitting so close to the wreckage, he wrote a single word: “Weird.” He has not commented further, and Tesla has not issued a statement.
The timing puts Tesla’s newest vehicle near an unrelated but highly visible tragedy just days after its Austin debut, a launch that had already drawn scrutiny from federal regulators. The National Highway Traffic Safety Administration opened an audit how Tesla certified the Cybercab as compliant with federal vehicle safety standards, a process Teslarati covered after the vehicle’s September 3 launch event. That inquiry concerns the car’s lack of a steering wheel and pedals, not the Miami crash.
Investigators from the FAA and NTSB are focused on the plane, not the parking lot beside it. Flight data reviewed by outlets including Simple Flying show the 767 touched down around 170 knots, well above the 135 to 140 knot range typical for the aircraft, though investigators have not determined a cause. Amazon said it is working with authorities and that its priority is the safety of everyone affected.
Whether any Cybercabs were damaged, and what Tesla plans for the fleet parked near one of the country’s busiest airports, remain open questions.
Tesla has reached a notable benchmark in its autonomous driving program after its Robotaxi fleet surpassed one million miles of unsupervised operation. The company made the announcement during its Cybercab event in Austin on September 3.
Tesla Vice President of AI Ashok Elluswamy told attendees he was happy to report the fleet had achieved one million miles of unsupervised Robotaxi operation as a testament to safety.
The new total marked a sharp increase from the 380,000 unsupervised miles Tesla disclosed during its second-quarter 2026 earnings update in late July.
In roughly six weeks, the company added about 620,000 miles. That acceleration followed Tesla’s decision to remove in-vehicle safety monitors from most of its operations outside the San Francisco Bay Area.
Credit: Tesla
Tesla first launched Robotaxi service in Austin in June 2025 with safety drivers present. It later began fully unsupervised rides and expanded into Dallas, Houston, Miami, Orlando, and Tampa. The San Francisco Bay Area remains the exception, where a safety monitor still rides in the vehicle under California permitting rules.
The company has not released a city-by-city breakdown of the one million unsupervised miles.
The milestone arrived as Tesla began offering public Cybercab rides in Austin. The purpose-built vehicle has no steering wheel or pedals and is designed only for autonomous ride-hailing. Production versions joined the existing fleet of modified Tesla vehicles already operating in the service.
Tesla’s unsupervised mileage is growing at a double-digit weekly rate according to earlier company comments, yet its fleet size remains modest compared with established competitors. Waymo has accumulated more than 200 million fully autonomous rider-only miles. Tesla has described its own unsupervised operations as having recorded zero notable incidents in the period leading up to the July update.
The one-million-mile figure reflects Tesla’s shift from supervised testing to broader driverless service in multiple states. It also highlights the company’s strategy of using both existing Model Y vehicles and the new Cybercab to scale its network.
Credit: Tesla
Whether the rapid recent growth continues will depend on further city expansions, regulatory approvals, and the performance of the purpose-built Cybercab in everyday paid rides. Tesla has not specified how many of the latest miles involved the new vehicle versus the rest of the fleet.
The announcement underscores Tesla’s progress toward a larger robotaxi network while illustrating the remaining gap in total autonomous experience relative to longer-operating rivals.
Tesla AI lead Ashok Elluswamy said this week that 24-hour Robotaxi service is close. Replying on X to a rider who wanted Cybercab trips all night, he wrote that the capability would arrive “next month or so” once “the next tech to merge on the v15 plan” is ready.
The comment landed on September 4, one day after Tesla opened public Cybercab rides in Austin. It is the clearest near-term timeline yet for overnight unsupervised operation. Tesla’s paid Robotaxi network currently runs from 6 a.m. to 10 p.m. seven days a week across Austin, Dallas, Houston, Miami, Orlando, and Tampa.
next month or so. the next tech to merge on the v15 plan will enable it.
— Ashok Elluswamy (@aelluswamy) September 4, 2026
That 16-hour window is shorter than the 6 a.m. to 2 a.m. schedule the company used for much of the prior year.
Elluswamy did not name the specific feature or say whether the change would apply first to purpose-built Cybercabs, the existing Model Y fleet, or both. He also offered no city-by-city rollout list. The link to Full Self-Driving v15 is nevertheless significant.
Tesla has described v15 as a step-change architecture with seven parallel improvement tracks and roughly ten times more parameters than earlier builds. Early versions of that software already operate on the Robotaxi fleet and contain about 40 percent of the planned gains.
By July 2026, the unsupervised fleet had logged more than 380,000 miles across six cities in two states with what the company called an impeccable safety record and no notable incidents caused by the vehicles themselves. Tesla has repeatedly argued that camera-based end-to-end neural networks, rather than extra sensors, are the core of the solution.
Overnight service would test that claim in lower-light conditions and would also raise vehicle utilization, a key variable for Robotaxi unit economics. The company has already begun using public Superchargers at night and is building dedicated Robotaxi charging sites.
Riders have asked why software must change if the cars already drive in the dark. The practical answer appears to be reliability and scale: Tesla has held back mass expansion until more of the v15 stack is merged, citing the need for higher confidence before putting thousands of unoccupied vehicles on streets around the clock.
If the next module arrives on the timetable Elluswamy sketched, 24-hour service could begin in October 2026 in at least some markets.
That would mark a shift from a daytime-bounded pilot to a service that can run whenever demand exists, including the late-night hours that have so far remained out of reach.
Tesla Cybercabs narrowly miss deadly Amazon cargo plane crash
Tesla crosses major Unsupervised Self-Driving milestone
