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Tesla Semi with trailer showcases unearthly acceleration and sound in new sighting
Just like all of Tesla’s other offerings, the Semi is a very quick vehicle. Prior to the truck’s unveiling, Elon Musk noted in a TED Talk that the Semi would be a “very spry” truck that could be driven around like sports car.
Musk’s comments were eventually highlighted by the Semi’s specs, such as its 0-60 mph time of 5 seconds flat when launching without a trailer, as well as actual sightings of the vehicle accelerating like a high-performance sedan. Earlier this year, for one, the Semi was spotted performing a seemingly impromptu tire-shredding acceleration run while cruising on an area between Tesla’s Fremont factory and its Palo Alto headquarters.
The Semi has since been sighted in multiple states across the US, and during the company’s Q2 2018 earnings call, Jerome Guillen, the former head of Tesla’s truck programs who is now serving as the company’s President of Automotive, pointed out that the vehicle had already been improved since it was initially unveiled. The exact nature of these improvements remains to be seen, but if a video of the Semi captured earlier this month is any indication, it appears that the electric long-hauler has gotten even more daunting and impressive when it performs a full-speed acceleration run.
The Tesla Semi was sighted in Salt Lake City earlier this month, and not long after that, the truck visited the company’s office in Draper, UT. The vehicle attracted the attention of members of the Tesla community, including r/TeslaMotors subreddit member u/m3gusta_, who was able to capture the vehicle on video as it accelerated forward while hauling a trailer. The video was brief, but it was enough to show what the Semi looks and sounds like when it is launching with what seemed like the vehicle’s full power. Needless to say, the Tesla Semi’s quickness, as well as the unmistakable, high-pitched, futuristic sound of the truck’s four Model 3-derived electric motors, were nothing short of unearthly.
The Semi’s performance, handling, and power were specifically pointed out by professional driver Emile Bouret, a close friend of Tesla chief designer Franz von Holzhausen, in an Instagram post earlier this month. Bouret, who is no stranger to the power and performance of Tesla’s electric cars due to his work since the original Tesla Roadster (he also conducted the test drives in the next-gen Roadster during the Semi’s unveiling last year), noted that the Semi’s “speed and agility” were at odds with a vehicle of its size. Bouret further dubbed the electric long-hauler as a truck that is cool and crazy in equal measure.
Over the past month, sightings of the Semi have increased, with the vehicle being spotted traveling across several states and visiting some of its reservation holders like J.B. Hunt, UPS, and Ruan Transportation Management Systems. Tesla’s engineers accompanying the vehicle as it conducted its real-world tests have also begun sharing information about the truck to the Tesla community. During a stop in CO, for example, Tesla engineers shared details on the Semi’s upcoming sleeper cabin, the prototype’s carbon fiber construction, and the truck’s existing 26-camera system.
When the vehicle was unveiled last year, CEO Elon Musk noted that the Tesla Semi is expected to begin production sometime in 2019. As noted by Eric Markowitz & Dan Crowley of Worm Capital in a note published after a tour of Gigafactory 1, Tesla is planning on “earnestly” producing the Semi by 2020.
Watch the Tesla Semi launch with a trailer in the video below. Do note that this video is best viewed with the sound turned up.
https://streamable.com/vvkn6
Elon Musk has acknowledged that early discussions with Taiwan Semiconductor Manufacturing Company (TSMC) could bring the company into his ambitious Terafab semiconductor project, signaling a possible partnership with the world’s leading contract chipmaker.
Musk confirmed that early talks are underway, but as of right now, they are “just discussions.” There is no confirmation of a deal nor dismissal of the possibility of one, leaving open the prospect of one of the largest advanced-chip collaborations under discussion in the U.S.
@wholemars Just discussions, but something may come of it
— Elon Musk (@elonmusk) October 3, 2026
The report that speculated on potential discussions between Terafab and TSMC comes from Tim Culpan, who outlined a few ways the collaboration could operate. One is TSMC using the project as an “anchor customer” for future facilities in Texas, potentially contributing process expertise, operational know-how, or capacity while Terafab provides capital, long-term purchase commitments, or both.
Tesla and SpaceX jointly developed the Terafab project, with Intel already participating on the tech side. Elon Musk announced the project in March, and it intends to produce more than one terawatt of AI compute capacity annually once fully built.
Company statements place the first phase at approximately $16.8 billion in cost, with later filings pointing to a total that could reach well into the tens of billions across multiple stages.
Intel joined the effort in April 2026 and is expected to supply its 14A manufacturing process for the full-scale plant.
Musk has said existing suppliers, including Samsung and TSMC, remain important for near-term needs; Tesla already has production arrangements with Samsung for AI5 and AI6 chips, but that future demand from Optimus robots, Cybercab vehicles, and planned space-based data centers will eventually exceed what the global industry can currently deliver.
Terafab is positioned as the long-term answer to that projected shortfall, and Tesla did something similar during COVID to avoid a chip shortage. This is just a much larger-scale solution.
If the partnership were to materialize, it would add TSMC’s industry-leading strategies to a project that already combines Tesla’s and SpaceX’s capital and offtake with Intel’s process technology. For now, the only public confirmation is Musk’s brief acknowledgement that conversations are occurring.
Tesla’s early strategy for charging units operating within its Robotaxi fleet reveals that the company surely has not lost any of that scrappy DNA that took it from an unlikely success story to the most valuable carmaker in the world.
An observer at a Tesla Supercharger in Austin spotted ten total Robotaxi vehicles arrive: one Cybercab and nine Model Y units. A Tesla employee was waiting at the lot and allowed each unit to park itself; every car that arrived had nobody in it.
Tesla wins FCC approval for wireless Cybercab charging system
The Tesla employee would walk around and plug each car in, adjusting the parking if needed:
So look at what I found. This is how Tesla charges unsupervised robotaxis at a public supercharger. Here is a driverless Cybercab showing up with no one in it. There are 9 other Model Ys that showed up too. A Tesla employee is walking around and plugging each of them in. She also moves the cars if they are not positioned well enough to charge. I love this process. One person charges multiple robotaxis at once
— Abhimanyu Yadav (@WorldlyReviewer) October 3, 2026
It’s a very interesting strategy, but extremely understandable at this early point in the Robotaxi program. It’s only been out for about 15 months, and Cybercab just entered the fleet in early September.
On top of that, Tesla is still working tirelessly on its wireless charging apparatus, and a new patent was just published regarding that product last week.
However, this is just another example of how Tesla still has plenty of that scrappy DNA leftover from the “production hell” days, when CEO Elon Musk slept on the floor of the factory, employees were working crazy hours, Tesla was building Sprung Structures to build cars in, and the company was tiptoeing on the brink of bankruptcy.
@Teslarati Sheer magnitude of the entire production system is hard to appreciate. Almost every element of production is >75% automated. Only wire harnesses & general assembly, which are <10% of production costs, are primarily manual.
— Elon Musk (@elonmusk) October 12, 2020
For now, Tesla is utilizing a simple system for recharging its ride-hailing vehicles, and that is a Tesla employee doing it manually until another solution presents itself. Sure, it’s not the most high-tech thing, and it certainly is not what people might have expected at this point in time, but it works, and it’s keeping the entire suite running.
Tesla is expanding its Robotaxi service hours by pushing the time back by one hour, keeping the ride-hailing service operational until 11 p.m., one hour later than previously.
CEO Elon Musk confirmed the change and offered a specific reason the expansion has been gradual: the system still needs to reliably avoid small pets that are difficult to see after dark, as they commonly blend into the color of the road, especially when they’re grey.
The latest adjustment restores only a fraction of the operating window the service once held. When paid Robotaxi rides began in Austin on June 22, 2025, vehicles ran from 6 a.m. to midnight.
In September 2025, Tesla lengthened the day to a 2 a.m. close, producing a 20-hour window that stayed in place for most of the following year. By early August of this year, the cutoff had already been pulled back; an August 26 update formalized hours of 6 a.m. to 10 p.m. across Austin and several other markets.
The October move to 11 p.m. therefore leaves the Austin day one hour shorter than the original launch schedule and three hours shorter than the 2025 peak.
Musk addressed the constraint directly after the announcement. “The main thing we’re trying to solve is making sure that we don’t run over pets when they’re hard to see at night,” he wrote. “Literally trying to avoid grey kittens on grey tarmac in the dark.”
Robotaxi operating hours moved from 10pm to 11pm.
The main thing we’re trying to solve is making sure that we don’t run over pets when they’re hard to see at night. Literally trying to avoid grey kittens on grey tarmac in the dark.
— Elon Musk (@elonmusk) October 3, 2026
The example points to a low-contrast perception problem in which a small animal can blend into the road surface under limited lighting.
Tesla’s vehicles rely on cameras and neural-network processing rather than lidar; Musk has previously argued that advanced vision software can extract useful information even in low light by analyzing photon counts, but the pet-detection case remains the stated limiter in later hours.
The modest schedule change arrives alongside faster growth in the purpose-built Cybercab fleet. Texas registration data tracked by observers showed the Austin Cybercab count rising sharply in recent weeks, reaching 169 vehicles after more than 100 were added in a short span.
Tesla has indicated that a broader shift toward 24-hour operation is tied to the upcoming FSD v15 software release expected this month on Robotaxi vehicles. Until that capability is validated for the edge cases Musk described, the company continues to add service time incrementally rather than jumping straight to overnight coverage.
The one-hour extension gives Austin riders a later option for evening trips while the underlying detection work continues.
Elon Musk teases TSMC as potential Terafab partner
Tesla reveals early Robotaxi charging strategy, showing scrappy DNA
