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SpaceX’s first ever Block 5 booster gives one last hurrah, in photos
After helping SpaceX enter a new era of routine rocket reusability, the very first Falcon 9 Block 5 booster is officially nothing more than bits, pieces, and a few artificial reefs at the bottom of the Atlantic Ocean — intentionally destroyed to give SpaceX the confidence it needs to soon launch astronauts.
Captured on camera by Teslarati photographer Richard Angle, the upgraded Falcon 9 booster was able to give one last spectacular hurrah prior to its even more spectacular demise, returning fire to Kennedy Space Center (KSC) Launch Complex 39A for the first time in more than half a year. Lacking landing legs and grid fins, visible instead as comically stark outlines on the booster’s sooty exterior, Falcon 9 B1046 lifted off for the fourth and final time on January 19th, 2020.
In doing so, B1046 became the third orbital-class booster ever to fly launch four separate missions — a more than fitting end to the first in a line of upgraded Falcon 9 rockets that have brought with them major improvements in reusability and reliability. Nevertheless, a little over 90 seconds after lifting off for the fourth time, Falcon 9 B1046 – left behind after Crew Dragon successfully escaped the (simulated) failing rocket – yielded under intense off-nominal stresses, rupturing the booster’s propellant tanks and creating a vast fireball at least 300 meters (1000+ ft) in diameter.
Powered by nine Merlin 1D engines and capable of producing up to 7600 kN (1.7 million lbf) of thrust, Falcon 9 B1046 was extensively tested at SpaceX’s McGregor, Texas development facilities over a period of two or so months – unusually lengthy. The extra time was used to make sure that the first completed Block 5 booster – representing an almost clean-slate upgrade of the Falcon rocket family – was agreeing with SpaceX’s engineering models and expectations at all points.
The company likely spent several weeks or more performing numerous wet dress rehearsals (WDRs) — filling Falcon 9 B1046’s propellant tanks with liquid oxygen, refined kerosene (RP-1), helium, and nitrogen and verifying that the rocket was structurally sound and functioning smoothly. Once complete, SpaceX moved onto static fire testing, igniting the booster’s M1D engines for increasing periods of time. Finally, the company wrapped up the rocket and shipped it by road from Texas to Florida.

Shortly thereafter, the rocket was quickly prepared for flight and became the first Falcon 9 Block 5 booster to successfully launch and land in May 2018. Over the course of 2018, SpaceX debuted another five Block 5 boosters, while Falcon 9 B1046 became the first Block 5 booster to launch both twice and three times in August and December.



Finally, on January 19th, 2020, Falcon 9 B1046 lifted off for the fourth and last time, becoming the third SpaceX booster to do so in barely two months. Fittingly, B1046’s last launch occurred at Pad 39A, the same launch site it lifted off from for the first time back in May 2018. Carrying an expendable upper stage, Dragon trunk, and Crew Dragon capsule C205, B1046 could not have experienced a more perfect 90 or so seconds of uninterrupted flight. Interrupted, however, it would shortly thereafter become.






Around 85 seconds after liftoff, Falcon 9 B1046 shut off its Merlin 1D engines at the same time as Crew Dragon C205 ignited eight SuperDraco engines, briskly carrying the spacecraft several thousand feet away in just a handful of seconds. Now fully uncontrolled and rudely interrupted to a supersonic wall of air, B1046 found itself bent and contorted in ways – and under loads – it simply was not designed to survive. Seconds later, the booster’s pressurized propellant tanks were breached, releasing a rapidly dispersing cloud of fuel and oxidizer that almost instantly ignited, creating a fireball the size of several city blocks.
All things considered, not a bad way to go for a well-worn rocket.
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Tesla ‘Mad Max’ gets its first bit of regulatory attention
Tesla “Mad Max” mode has gotten its first bit of regulatory attention, as the National Highway Traffic Safety Administration (NHTSA) has asked for additional information on the Speed Profile.
A few weeks ago, Tesla officially launched a new Speed Profile for Full Self-Driving (Supervised) known as “Mad Max,” which overtook the “Hurry” mode for the fastest setting FSD offers.
Tesla launches ‘Mad Max’ Full Self-Driving Speed Profile, its fastest yet
It launched with Full Self-Driving v14.1.2, and it was no secret that the company was looking for a new mode that would cater to more aggressive driving styles.
The release notes showed the description of the Speed Profile as:
“Introduced new speed profile MAD MAX, which comes with higher speeds and more frequent lane changes than Hurry.”
It certainly lived up to its description. In our testing, it was aggressive, fast, and drove similarly to some of the more challenging traffic patterns I’ve come across.
In normal highway driving, it was one of the quicker cars on the road, while other applications saw it be a suitable version for navigating things like rush-hour traffic.
Here’s what my experience with it was:
🚨 Tesla “Mad Max” testing on FSD v14.1.2
It drives like a human being! Consistent lane changes, keeps up with quicker traffic, very refined
Well done Tesla Team pic.twitter.com/wzTucDhczA
— TESLARATI (@Teslarati) October 19, 2025
While Tesla owners have certainly enjoyed the feature and the behaviors of Mad Max, the NHTSA said it is in contact with Tesla about it, looking to gather additional information. Additionally, it said:
“The human behind the wheel is fully responsible for driving the vehicle and complying with all traffic safety laws.”
The important thing to note with Mad Max mode, along with the other Speed Profiles, is that the driver can choose whichever one they’d like, and they all cater to different driving styles.
While Mad Max is more aggressive, modes like “Sloth” and “Standard” are significantly more conservative and can be more suitable for those who are not comfortable with the faster, more spirited versions.
News
Tesla shares AI5 chip’s ambitious production roadmap details
Tesla CEO Elon Musk has revealed new details about the company’s next-generation AI5 chip, describing it as “an amazing design.”
Tesla CEO Elon Musk has revealed new details about the company’s next-generation AI5 chip, describing it as “an amazing design” that could outperform its predecessor by a notable margin. Speaking during Tesla’s Q3 2025 earnings call, Musk outlined how the chip will be manufactured in partnership with both Samsung and TSMC, with production based entirely in the United States.
What makes AI5 special
According to Musk, the AI5 represents a complete evolution of Tesla’s in-house AI hardware, building on lessons learned from the AI4 system currently used in its vehicles and data centers. “By some metrics, the AI5 chip will be 40x better than the AI4 chip, not 40%, 40x,” Musk said during the Q3 2025 earnings call. He credited Tesla’s unique vertical integration for the breakthrough, noting that the company designs both the software and hardware stack for its self-driving systems.
To streamline the new chip, Tesla eliminated several traditional components, including the legacy GPU and image signal processor, since the AI5 architecture already incorporates those capabilities. Musk explained that these deletions allow the chip to fit within a half-reticle design, improving efficiency and power management.
“This is a beautiful chip,” Musk said. “I’ve poured so much life energy into this chip personally, and I’m confident this is going to be a winner.”
Tesla’s dual manufacturing strategy for AI5
Musk confirmed that both Samsung’s Texas facility and TSMC’s Arizona plant will fabricate AI5 chips, with each partner contributing to early production. “It makes sense to have both Samsung and TSMC focus on AI5,” the CEO said, adding that while Samsung has slightly more advanced equipment, both fabs will support Tesla’s U.S.-based production goals.
Tesla’s explicit objective, according to Musk, is to create an oversupply of AI5 chips. The surplus units could be used in Tesla’s vehicles, humanoid robots, or data centers, which already use a mix of AI4 and NVIDIA hardware for training. “We’re not about to replace NVIDIA,” Musk clarified. “But if we have too many AI5 chips, we can always put them in the data center.”
Musk emphasized that Tesla’s focus on designing for a single customer gives it a massive advantage in simplicity and optimization. “NVIDIA… (has to) satisfy a large range of requirements from many customers. Tesla only has to satisfy one customer, Tesla,” he said. This, Musk stressed, allows Tesla to delete unnecessary complexity and deliver what could be the best performance per watt and per dollar in the industry once AI5 production scales.
Energy
Tesla VP hints at Solar Roof comeback with Giga New York push
The comments hint at possible renewed life for the Solar Roof program, which has seen years of slow growth since its 2016 unveiling.
Tesla’s long-awaited and way underrated Solar Roof may finally be getting its moment. During the company’s Q3 2025 earnings call, Vice President of Energy Engineering Michael Snyder revealed that production of a new residential solar panel has started at Tesla’s Buffalo, New York facility, with shipments to customers beginning in the first quarter of 2026.
The comments hint at possible renewed life for the Solar Roof program, which has seen years of slow growth since its 2016 unveiling.
Tesla Energy’s strong demand
Responding to an investor question about Tesla’s energy backlog, Snyder said demand for Megapack and Powerwall continues to be “really strong” into next year. He also noted positive customer feedback for the company’s new Megablock product, which is expected to start shipping from Houston in 2026.
“We’re seeing remarkable growth in the demand for AI and data center applications as hyperscalers and utilities have seen the versatility of the Megapack product. It increases reliability and relieves grid constraints,” he said.
Snyder also highlighted a “surge in residential solar demand in the US,” attributing the spike to recent policy changes that incentivize home installations. Tesla expects this trend to continue into 2026, helped by the rollout of a new solar lease product that makes adoption more affordable for homeowners.
Possible Solar Roof revival?
Perhaps the most intriguing part of Snyder’s remarks, however, was Tesla’s move to begin production of its “residential solar panel” in Buffalo, New York. He described the new panels as having “industry-leading aesthetics” and shape performance, language Tesla has used to market its Solar Roof tiles in the past.
“We also began production of our Tesla residential solar panel in our Buffalo factory, and we will be shipping that to customers starting Q1. The panel has industry-leading aesthetics and shape performance and demonstrates our continued commitment to US manufacturing,” Snyder said during the Q3 2025 earnings call.
Snyder did not explicitly name the product, though his reference to aesthetics has fueled speculation that Tesla may finally be preparing a large-scale and serious rollout of its Solar Roof line.
Originally unveiled in 2016, the Solar Roof was intended to transform rooftops into clean energy generators without compromising on design. However, despite early enthusiasm, production and installation volumes have remained limited for years. In 2023, a report from Wood Mackenzie claimed that there were only 3,000 operational Solar Roof installations across the United States at the time, far below forecasts. In response, the official Tesla Energy account on X stated that the report was “incorrect by a large margin.”
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