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Tesla’s Model 3 and the death of plug-in hybrids: ‘Full electric is a much more elegant solution’
Tesla took a big bet when it decided to launch the Model 3. Being a vehicle designed for the mass market, the sheer scale of the sedan’s production was something that Tesla has not dealt with before. It took more time than expected and a trip through “production hell,” but the Model 3 has now been ramped, with Elon Musk noting that producing 5,000 of the vehicles per week is currently no big deal for Tesla.
The market’s reception to the Model 3 has been encouraging. The vehicle has been performing well in the United States, ranking among America’s best-selling passenger cars. In September alone, the Model 3 became the 4th best-selling car in the US based on sales volume. Based on revenue, the Model 3 was even more impressive, ranking first among passenger cars sold in the country. Tesla does not seem to be planning on pulling back from its Model 3 push either, as the electric carmaker has started rolling out exhibits of the vehicle to Europe and Asia this month.
Amidst the evident success of the Model 3 and Elon Musk’s high-stakes bet on the electric sedan, another class of vehicles has begun to show notable signs of a decline — the plug-in hybrids. Plug-in hybrid electric vehicles (PHEV) are equipped with both an electric motor and an internal combustion engine. Popular cars in this class include the Chevy Volt, with its all-electric range of up to 53 miles, and a total range of 420 miles with a full battery and a full tank of gas.
PHEVs have mostly served as the “gateway” vehicles for customers looking to make the jump to electric transportation. Being equipped with a gasoline engine, owners need not worry about any of the initial drawbacks of pure EVs, such as limited range. Plug-in Hybrid and Electric Vehicle Research Center director Gil Tal noted to Bloomberg that in a way, PHEVs are like the “training wheels” of the electric car movement. That said, Tal noted that as practical, capable EVs like the Model 3 emerge, consumers might simply skip PHEVs and adopt all-electric cars instead.
“A full electric (car) is a much more elegant solution. It’s very simple to build and very low maintenance. It’s just a much more simple story. Plug-in hybrids are just the training wheels in the industry’s preparation for electric cars,” Tal said.
The death of plug-in hybrid electric vehicles became more real recently, with GM announcing that it was closing several of its plants across the United States and Canada. Among these plants was GM’s oldest factory at Detroit-Hamtramck, which produces the Volt. In a later statement, GM confirmed that it would be discontinuing the production of the Volt, with the company focusing on developing all-electric cars like the Bolt EV instead.
GM has announced that it is discontinuing the production of the Chevy Volt. [Credit: Chevrolet]
In a way, the apparent death of the PHEV seemed to have been predicted by Elon Musk eight years ago. In a statement to the media during the opening ceremony of the Fremont factory, Musk likened PHEVs to amphibians during the process of evolution. And just like amphibians, Musk noted that the number of PHEVs would likely decrease as the market moves into the full-electric era.
“(PHEVs are) similar to an amphibian. In the transition from the oceans to land, initially, there were a lot of amphibians. Now there’s not that many amphibians. So the only reason you’d ever need that gasoline engine is if the battery pack does not have enough range, if the recharge times are really slow, and all those things will get solved. So there’s a medium-term role for a plug-in hybrid, but in our view, not a long-term role. I think there’s a role for plug-in hybrids today and there’s a role for electrics, but I think long-term, it all goes electric.”
The seemingly impending death of the plug-in hybrid is not just the result of electric cars like Tesla’s Model S, 3, and X. Earlier this year, a Forbes report earlier this year noted that the efforts (or lack thereof) of manufacturers such as GM are partly to blame for the decline of PHEVs. Inasmuch as the Volt was warmly received by owners and well-reviewed by critics, for example, the vehicle remained a rare sight among GM’s dealerships across the United States. GM’s TV advertising campaigns have not featured the Volt, or its all-electric sibling, the Bolt EV, either.
That said, GM appears to be taking its EV initiative seriously this time around. Earlier this month, for one, VP of global strategy Mike Ableson boldly declared during a press conference that GM is looking to “lead the industry in EVs sometime in the next decade or so.” The next years will determine if these words will be true.
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
