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SpaceX CEO Elon Musk teases Mars breakthroughs as Starship design radically changes
During an interview with Axios, SpaceX CEO Elon Musk noted that he was “[really fired up about] a number of breakthroughs [SpaceX had recently made]” while being asked about his thoughts on the likelihood of him personally going to Mars (“70%”).
The minute-long teaser did not go much deeper but it certainly raises a number of questions (and hints at explanations) for a rapid-fire series of contradictory developments and changes to SpaceX’s BFR – since renamed to “Starship” and “Super Heavy” – per a series of tweets from Musk over the last two weeks.
In a typical Muskian fashion, when Axios interviewers asked, “What is the likelihood that you personally will go to Mars?”, the CEO responded with an exact percentage – 70% – without skipping a beat. Musk also fervently and rather eloquently refuted the popular and harebrained idea that any SpaceX-enabled Mars colony would simply become “an escape hatch for the rich”. If the rich wanted Mars or lunar bases as “escape hatches”, there are dozens of multibillionaires that could singlehandedly fund Musk’s estimated $2-10B price tag for the completion of the entire BFR development program while still retaining 50-90% of their net worth.
Musk’s retort is worth reading in full.
Mike Allen: “[Mars] could be an escape hatch for rich people.”
Elon Musk: “No! Your probability of dying on Mars is much higher than earth. Really the ad for going to Mars would be like Shackleton’s ad for going to the Antarctic. It’s gonna be hard. There’s a good chance of death, going in a little can through deep space. You might land successfully. Once you land successfully, you’ll be working nonstop to build the base. So, you know, not much time for leisure, and once you get there, even after doing all this, it’s a very harsh environment, so there’s a good chance you die there. We think you can come back but we’re not sure. Now, does that sound like an escape hatch for rich people?”
Back to BFR
While thoroughly entertaining, the most interesting aspect of this one-minute teaser was the approximate two seconds where Musk suggested that SpaceX had recently made several major breakthroughs in the context of BFR and Mars. What exactly those breakthroughs could be is entirely unclear, but the fact that Musk seemed positive about the recent developments and spoke of “breakthroughs” at all feels like an encouraging sign that the last two weeks of Musk’s chaotic announcements, updates, and abrupt cancellations are less indicative of program instability than they initially seemed to be.
Most notably, Musk appeared to announce and then completely cancel a sort of mini-spaceship that SpaceX was to base off of Falcon 9’s upper stage as a BFR spaceship technology demonstrator in less than two weeks. If realized, that mini-BFS would have reentered Earth’s atmosphere at orbital velocities to flight-test hypersonic fins and a new “ultra light” heat shield that will be (or would have been) critical for the overall success of BFS/Starship.
Contour remains approx same, but fundamental materials change to airframe, tanks & heatshield
— Elon Musk (@elonmusk) November 25, 2018
Ironically, in the middle of writing this article, Musk tweeted specifically about “fundamental” changes to the spaceship, leaving little more than the general appearance and propulsion systems unchanged. In essence, the design of BFS/Starship is now almost unrecognizable when compared with past iterations, at least from a perspective of the ship’s most critical systems.If Starship will not be built out of composites, then it’s possible that the multiple years SpaceX engineers and technicians have spent trying to develop large carbon composite propellant tanks (2016-present) and the time, energy, and capital put into those efforts will be almost entirely for naught if BFR pivots away from composite tanks.
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- A tall platform was moved inside the tent around November 10th, likely to support the integration of the tank dome and barrel section. (Pauline Acalin)
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- The dome was spied inside the tent on November 12. (Pauline Acalin)
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- SpaceX’s BFR tent is filled with custom hardware that is predominately useful only for building large composite rocket parts. (Pauline Acalin)
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- SpaceX’s huge Port of LA-based BFR tent, September 18th. (Pauline Acalin)
By all appearances, dozens of employees have spent the last year accepting delivery of $10-50M worth of custom-built composite tooling, setting it up, and building giant composite tank domes and segments. If composite tanks are no longer planned for the booster or spaceship, all that work may have been for nothing. Needless to say, we could certainly do for Musk’s proposed Reddit AMA – if not an entirely new BFR update event – to shed some light on the machinations behind these earthshaking programmatic changes.
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.
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Tesla Model Y and Model 3 named safest vehicles tested by ANCAP in 2025
According to ANCAP in a press release, the Tesla Model Y achieved the highest overall weighted score of any vehicle assessed in 2025.
The Tesla Model Y recorded the highest overall safety score of any vehicle tested by ANCAP in 2025. The Tesla Model 3 also delivered strong results, reinforcing the automaker’s safety leadership in Australia and New Zealand.
According to ANCAP in a press release, the Tesla Model Y achieved the highest overall weighted score of any vehicle assessed in 2025. ANCAP’s 2025 tests evaluated vehicles across four key pillars: Adult Occupant Protection, Child Occupant Protection, Vulnerable Road User Protection, and Safety Assist technologies.
The Model Y posted consistently strong results in all four categories, distinguishing itself through a system-based safety approach that combines structural crash protection with advanced driver-assistance features such as autonomous emergency braking, lane support, and driver monitoring.
This marked the second time the Model Y has topped ANCAP’s annual safety rankings. The Model Y’s previous version was also ANCAP’s top performer in 2022.
The Tesla Model 3 also delivered a strong performance in ANCAP’s 2025 tests, contributing to Tesla’s broader safety presence across segments. Similar to the Model Y, the Model 3 also earned impressive scores across the ANCAP’s four pillars. This made the vehicle the top performer in the Medium Car category.
ANCAP Chief Executive Officer Carla Hoorweg stated that the results highlight a growing industry shift toward integrated safety design, with improvements in technologies such as autonomous emergency braking and lane support translating into meaningful real-world protection.
“ANCAP’s testing continues to reinforce a clear message: the safest vehicles are those designed with safety as a system, not a checklist. The top performers this year delivered consistent results across physical crash protection, crash avoidance and vulnerable road user safety, rather than relying on strength in a single area.
“We are also seeing increasing alignment between ANCAP’s test requirements and the safety technologies that genuinely matter on Australian and New Zealand roads. Improvements in autonomous emergency braking, lane support, and driver monitoring systems are translating into more robust protection,” Hoorweg said.
Elon Musk’s xAI brings 1GW Colossus 2 AI training cluster online
Tesla AI5 chip nears completion, Elon Musk teases 9-month development cadence
