News
SpaceX rockets private astronaut crew into orbit for the first time in spaceflight history
For the first time in spaceflight history, a crew of all-private astronauts have rocketed into orbit – and on a SpaceX Falcon 9 rocket and Crew Dragon spacecraft.
Right on schedule, just before 8:03 pm EDT, an orbit-proven Crew Dragon spacecraft lifted off from Kennedy Space Center Pad 39A on a twice-flown Falcon 9 booster and new upper stage. Making it look easy, the booster performed flawlessly on its third spaceflight, boosting Dragon towards orbit and nailing a landing aboard drone ship Just Read The Instructions (JRTI). About 2.5 minutes after launch, Falcon 9’s upper stage took over and burned for another six minutes to precisely inject the spacecraft and its unprecedented all-private crew of Inspiration4 astronauts into an approximately 200 km (125 mi) parking orbit.
With that single feat, SpaceX has boosted the number of private citizens that have reached Earth orbit by 50% – from 8 to 12. Unlike any of the eight other private orbital spaceflights in history, though, Crew Dragon will now use its built-in Draco maneuvering thrusters to boost its orbital apogee (peak) to around 575 km (357 mi) – the highest altitude reached by private citizens in the history of spaceflight and by astronauts in general since 2009.
Assuming Dragon successfully reaches its planned apogee, Inspiration4 will mark the seventh-highest stable Earth orbit ever reached by humans and the first private (orbital) launch to fly astronauts in a flight-proven spacecraft. Heralding the array of firsts it marked, Inspiration4’s launch window also coincidentally opened just half an hour after sunset at Cape Canaveral, Florida, providing a famously spectacular view to onlookers as Falcon 9 and Dragon ascended back into sunlight for the majority of the launch.
Against the night sky present for those on the ground, the rocket’s miles-long and miles-wide exhaust plume was lit up by the long-since-set sun, producing an affectionately named ‘jellyfish’ that was visible for hundreds of miles.
Created by billionaire and mission commander Jared Isaacman, Inspiration4 could mark a turning point for genuine orbital space tourism, which has been limited to just eight private citizens in the history of spaceflight. While Dragon is far from affordable, with seats believed to cost tens of millions of dollars each, a combination of factors mean that it might be the first spacecraft in history to truly enable orbital space tourism at an unprecedented scale. Already, SpaceX has another four – and possibly five – Crew Dragon launches of four astronauts each scheduled to fly in just the next two years, more than doubling the number of private citizens that have reached orbit if all goes to plan.
Hinted at by its name, Inspiration4’s primary goal has been to inspire people around the world and to hopefully raise awareness that humanity is on the cusp of a future where spaceflight will be accessible to millions – not hundreds – of people. Inspiration4 member Haley Arceneaux is now the youngest American, first person with a prosthetic device, and first cancer survivor to reach orbit. Thanks to the mission, Dr. Sian Proctor has also become the first black woman in history to pilot a spacecraft to space or orbit.
Further, on top of $100M to be donated by Isaacman himself, Inspiration4 has managed to raise almost $35M in donations for St. Jude’s Children’s Hospital – one of the foremost cancer research and treatment hospitals in the US and the world.
Last but not least, the mission will also debut the largest spacecraft window ever flown in space or orbit – a modification to Crew Dragon called a cupola that SpaceX has now designed, built, qualified, and launched in less than a year.
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
