News
SpaceX’s next Falcon Heavy two-thirds done as side booster #2 leaves factory
First posted to a SpaceX-focused Facebook group by member Eric Schmidt, Falcon Heavy Flight 2’s second side booster (of two) was spotted eastbound in Arizona on December 3rd, partway through a journey from SpaceX’s Hawthorne, CA factory to its McGregor, TX testing facilities.
This is the second (known) Falcon Heavy-related booster spotted in less than a month and an incontrovertible sign that the company’s second-ever Falcon Heavy launch is perhaps just a handful of months away, with both side boosters now likely to be present in Florida by January 2019 barring unforeseen developments.
Look who was waving at passing planes over McGregor today!
A Falcon Heavy side booster on the McGregor test stand for a static fire test. pic.twitter.com/S7af6b0gHk
— NSF – NASASpaceflight.com (@NASASpaceflight) November 18, 2018
This second booster appearance follows on the heels of the first Falcon Heavy booster spotting on November 9-10, confirming that – at a minimum – two of the next rocket’s three first stage boosters have finish production and are now focused on completing their separate hot-fire acceptance tests at McGregor. Owing to the ironic fact that the center core – dramatically more complex than its pointy-nosed side core brethren – is far harder to discern while in transport, it’s even possible that the second side core spotting is actually the third new Falcon Heavy booster to depart SpaceX’s factory. The above booster was apparently the second SpaceX first stage to make its way east through Arizona in the week prior to its arrival, so that may well be the case.
SpaceX's second Falcon Heavy is slowly but surely coming together 😀 https://t.co/AYJsQ8Mld5
— Eric Ralph (@13ericralph31) November 13, 2018
While Falcon Heavy side boosters do sport easily recognizable nosecones, they apparently are able to be modified from a Falcon 9 booster to a side booster with no more than a week or two’s work. On the other hand, the rocket’s center booster is dramatically more complex and requires an entirely new custom rocket be built from scratch thanks to the extreme loads it must survive when the two side boosters channel all of their thrust directly into the center core during launch.
However, until the arm-like mechanisms that connect the center stage to its two side boosters are attached, it’s extremely difficult to discern between a normal Falcon 9 booster and a Falcon Heavy center stage. Until a center core is more or less unwrapped and showing off its octaweb or unusual bumps around the interstage, its identity is likely to remain a secret. In the past three months, no fewer than four Falcon boosters arrived at Cape Canaveral, while only one (or maybe two) of them have launched in the time since their arrival.
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- SpaceX’s first Falcon Heavy prepares for launch. (SpaceX)
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- Falcon Heavy ahead of its inaugural launch. (SpaceX)
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- SpaceX’s Falcon Heavy prepares for the huge rocket’s inaugural launch. (SpaceX)
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- Falcon Heavy just prior to its first-ever integrated static fire test. (SpaceX)
Given that both side boosters have traveled from California to McGregor, it’s almost certain that Falcon Heavy will fly for the second time with all-new Block 5 hardware, including all three boosters and the upper stage. Most importantly, a Block 5 version of the non-interchangeable center stage should ultimately be able to launch multiple times with zero or minimal refurbishment and repairs, potentially making Falcon Heavy for more viable from a production and internal cost perspective. For a rocket that may only ever launch twice per year, one or two custom center cores could be all that is needed over the vehicle’s operational lifetime, save for any potential launch contract that requires expendable performance.
Ultimately, this second Falcon Heavy booster spotting in less than four weeks is a thrilling sign that SpaceX is pushing extremely hard to have the rocket’s next iteration integrated and ready to launch as soon as possible, perhaps as early as Q1 2019. As its two side boosters begin to arrive in Florida, we should start to have a better idea of when exactly the massive rocket’s second launch might be.
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Elon Musk
Tesla confirms that work on Dojo 3 has officially resumed
“Now that the AI5 chip design is in good shape, Tesla will restart work on Dojo 3,” Elon Musk wrote in a post on X.
Tesla has restarted work on its Dojo 3 initiative, its in-house AI training supercomputer, now that its AI5 chip design has reached a stable stage.
Tesla CEO Elon Musk confirmed the update in a recent post on X.
Tesla’s Dojo 3 initiative restarted
In a post on X, Musk said that with the AI5 chip design now “in good shape,” Tesla will resume work on Dojo 3. He added that Tesla is hiring engineers interested in working on what he expects will become the highest-volume AI chips in the world.
“Now that the AI5 chip design is in good shape, Tesla will restart work on Dojo3. If you’re interested in working on what will be the highest volume chips in the world, send a note to AI_Chips@Tesla.com with 3 bullet points on the toughest technical problems you’ve solved,” Musk wrote in his post on X.
Musk’s comment followed a series of recent posts outlining Tesla’s broader AI chip roadmap. In another update, he stated that Tesla’s AI4 chip alone would achieve self-driving safety levels well above human drivers, AI5 would make vehicles “almost perfect” while significantly enhancing Optimus, and AI6 would be focused on Optimus and data center applications.
Musk then highlighted that AI7/Dojo 3 will be designed to support space-based AI compute.
Tesla’s AI roadmap
Musk’s latest comments helped resolve some confusion that emerged last year about Project Dojo’s future. At the time, Musk stated on X that Tesla was stepping back from Dojo because it did not make sense to split resources across multiple AI chip architectures.
He suggested that clustering large numbers of Tesla AI5 and AI6 chips for training could effectively serve the same purpose as a dedicated Dojo successor. “In a supercomputer cluster, it would make sense to put many AI5/AI6 chips on a board, whether for inference or training, simply to reduce network cabling complexity & cost by a few orders of magnitude,” Musk wrote at the time.
Musk later reinforced that idea by responding positively to an X post stating that Tesla’s AI6 chip would effectively be the new Dojo. Considering his recent updates on X, however, it appears that Tesla will be using AI7, not AI6, as its dedicated Dojo successor. The CEO did state that Tesla’s AI7, AI8, and AI9 chips will be developed in short, nine-month cycles, so Dojo’s deployment might actually be sooner than expected.
Elon Musk
Elon Musk’s xAI brings 1GW Colossus 2 AI training cluster online
Elon Musk shared his update in a recent post on social media platform X.
xAI has brought its Colossus 2 supercomputer online, making it the first gigawatt-scale AI training cluster in the world, and it’s about to get even bigger in a few months.
Elon Musk shared his update in a recent post on social media platform X.
Colossus 2 goes live
The Colossus 2 supercomputer, together with its predecessor, Colossus 1, are used by xAI to primarily train and refine the company’s Grok large language model. In a post on X, Musk stated that Colossus 2 is already operational, making it the first gigawatt training cluster in the world.
But what’s even more remarkable is that it would be upgraded to 1.5 GW of power in April. Even in its current iteration, however, the Colossus 2 supercomputer already exceeds the peak demand of San Francisco.
Commentary from users of the social media platform highlighted the speed of execution behind the project. Colossus 1 went from site preparation to full operation in 122 days, while Colossus 2 went live by crossing the 1-GW barrier and is targeting a total capacity of roughly 2 GW. This far exceeds the speed of xAI’s primary rivals.
Funding fuels rapid expansion
xAI’s Colossus 2 launch follows xAI’s recently closed, upsized $20 billion Series E funding round, which exceeded its initial $15 billion target. The company said the capital will be used to accelerate infrastructure scaling and AI product development.
The round attracted a broad group of investors, including Valor Equity Partners, Stepstone Group, Fidelity Management & Research Company, Qatar Investment Authority, MGX, and Baron Capital Group. Strategic partners NVIDIA and Cisco also continued their support, helping xAI build what it describes as the world’s largest GPU clusters.
xAI said the funding will accelerate its infrastructure buildout, enable rapid deployment of AI products to billions of users, and support research tied to its mission of understanding the universe. The company noted that its Colossus 1 and 2 systems now represent more than one million H100 GPU equivalents, alongside recent releases including the Grok 4 series, Grok Voice, and Grok Imagine. Training is also already underway for its next flagship model, Grok 5.
Elon Musk
Tesla AI5 chip nears completion, Elon Musk teases 9-month development cadence
The Tesla CEO shared his recent insights in a post on social media platform X.
Tesla’s next-generation AI5 chip is nearly complete, and work on its successor is already underway, as per a recent update from Elon Musk.
The Tesla CEO shared his recent insights in a post on social media platform X.
Musk details AI chip roadmap
In his post, Elon Musk stated that Tesla’s AI5 chip design is “almost done,” while AI6 has already entered early development. Musk added that Tesla plans to continue iterating rapidly, with AI7, AI8, AI9, and future generations targeting a nine-month design cycle.
He also noted that Tesla’s in-house chips could become the highest-volume AI processors in the world. Musk framed his update as a recruiting message, encouraging engineers to join Tesla’s AI and chip development teams.
Tesla community member Herbert Ong highlighted the strategic importance of the timeline, noting that faster chip cycles enable quicker learning, faster iteration, and a compounding advantage in AI and autonomy that becomes increasingly difficult for competitors to close.
AI5 manufacturing takes shape
Musk’s comments align with earlier reporting on AI5’s production plans. In December, it was reported that Samsung is preparing to manufacture Tesla’s AI5 chip, accelerating hiring for experienced engineers to support U.S. production and address complex foundry challenges.
Samsung is one of two suppliers selected for AI5, alongside TSMC. The companies are expected to produce different versions of the AI5 chip, with TSMC reportedly using a 3nm process and Samsung using a 2nm process.
Musk has previously stated that while different foundries translate chip designs into physical silicon in different ways, the goal is for both versions of the Tesla AI5 chip to operate identically. AI5 will succeed Tesla’s current AI4 hardware, formerly known as Hardware 4, and is expected to support the company’s Full Self-Driving system as well as other AI-driven efforts, including Optimus.
Tesla confirms that work on Dojo 3 has officially resumed
Elon Musk’s xAI brings 1GW Colossus 2 AI training cluster online
