True to their word, Tesla has finally launched FSD V12.6 on the 30th of December, squeaking in under the promised timeline before the end of the year. FSD V12.6 for HW3 vehicles is software update 2024.45.25.10, and the release notes reveal several interesting things about the update, but it was mostly what we expected — which is a good thing.
We expected FSD V12.6 to include End to End for highway driving, improved city streets behavior and potentially some features from FSD V13, and that’s exactly what happened.
According to Ashok Elluswamy, Tesla’s VP of AI, Tesla has also pulled in some improvements from V13 into this V12.6 release. This release has started rolling out to some Model S and Model X vehicles, but not the Model 3 and Model Y. Ashok says that it should become available for those models within a week.
FSD V12.6
V12.6 is supposed to be a big update for Hardware 3 vehicles and is part of Tesla’s commitment to continuing to support older vehicles. Let’s break down the release notes and talk about what’s new and what came from FSD V13.
End-to-End on Highway
The new end-to-end highway stack has finally arrived for HW3 vehicles. The new highway stack should mean better decision-making on the freeway. Up until now, HW3 vehicles have been using FSD V11’s stack for highway driving.
When End-to-End was introduced on city streets, it brought drastic improvements in how FSD was handled between V11.4.9 and V12.3.6. HW3 owners will hopefully see similar improvements in how the vehicle behaves on the highway.
Improved City Streets Behavior
As part of the update, Tesla has honed in on some of the issues with behavior on city streets, which should address the false green light braking and other issues that have been prevalent in current FSD V12 builds. That’ll be a big improvement, as it has become one of the sticking points for V12.
Speed Profiles
The updated speed profiles, including Hurry Mode, have now arrived. For now, the speed profiles are restricted to roads with a 50mph (80km/h) minimum speed limit, which was the same limit HW4 vehicles saw on FSD V12.5. Here is the breakdown of the new speed profiles:
Chill will drive in slower lanes, with minimal lane changes, and more strictly adhere to the speed limit. The minimal lane changes button has been removed, so if you want to have minimal lane changes, switch your profile to chill.
Standard is the new Average. It will drive at a normal speed, keeping pace and adjusting in accordance with traffic. It will dynamically adjust based on how fast traffic is moving based on Max Speed, and will make lane changes to stay at or around the speed of traffic.
Hurry replaces Assertive and will drive faster while also making more frequent lane changes to stay at or above the speed limit. It is fairly aggressive with its lane changes and looks for opportunities to get ahead or cut through the flow of traffic.
Earlier & More Natural Lane Change Decisions
This is going to be one of the most noticeable changes for HW3 users. FSD has always struggled with lane selection, especially in advance of an upcoming turn or exit. Tesla has put in a lot of work in previous FSD V12 versions - namely V12.5 and its offshoots, and these improvements should translate over to FSD V12.6 just as well.
We’re hoping to see considerably improved performance on V12.6 due to this particular set of changes.
Redesigned Controller (FSD V13)
The redesigned controller is a big change - and actually was brought down from FSD V13. The controller is what tracks your own vehicle, as well as other vehicles and objects around the vehicle. Smoother and more accurate tracking for the controller means that FSD will be able to make better decisions, resulting in higher confidence and smoother driving.
Autospeed is now gone, and is now replaced with Max Speed Offset. Tesla recommends the Max Speed Offset be set to 40%. You’ll instead be able to use the FSD Driver Profiles to better control vehicle speed. Chill will keep you at or below the speed limit, while Average will keep you around the speed limit. Hurry does what it sounds like and will speed up, if possible, up to that Max Speed Offset.
The minimum and maximum offsets are 40%, so if the limit is 50mph, your FSD speed limit will be up to 70 mph, while at -40%, it could travel as slow as 30 mph.
When Does It Arrive?
The update was available to employees early yesterday, and it later went out in an extremely limited fashion to some non-employees last night. Right now, it’s also limited to Model S and Model X vehicles with HW3. We should hopefully see a roll out to additional Model S/X cars in the coming days, but Ashok has already stated that it’ll be about a week before it’s available for other models.
That means that the majority of Model 3/Y owners with HW3 will likely have to wait at least a couple of weeks before receiving the update. We’re looking forward to seeing the first few drives and reviews of FSD V12.6.
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Tesla’s Dan W Priestley attended the Advanced Clean Transportation (ACT) Expo in Anaheim, California, and provided an update on Tesla’s Semi truck program. The presentation covered several key developments on the status of Tesla’s Nevada Semi Factory, refinements to the Semi, and Tesla’s plans for charging and ramping production through 2026.
Let’s dig in and take a look at everything that was captured by the Out of Spec team at ACT Expo. The original video is embedded below if you’d like to watch it.
Semi Factory & Production Ramp
Priestley reaffirmed the timelines mentioned during Tesla’s Q4 2024 Earnings Call that Tesla will scale Semi production in 2026. To achieve this, Tesla has been actively building and expanding the Gigafactory Nevada site, specifically to support the production of the Tesla Semi. The dedicated Semi facility will have a targeted annual capacity of 50,000 Semi trucks.
Following the beginning of production, Tesla will utilize the initial trucks to integrate into its own logistics operations. This will serve as both a final real-world testing ground as well as an opportunity for Tesla to gather data internally. Tesla plans to begin subsequent customer deliveries throughout 2026 as the ramp-up continues.
Reuters also reported that Tesla is hiring over 1,000 new employees at the Semi Factory to begin the rapid ramping of the program.
Semi has already amassed 7.9 million miles with Tesla’s current testing and operational fleets, providing some real-world data and testing. Feedback for the truck has been exceptionally successful, with many drivers praising the Semi’s performance and comfort.
New Tesla Semi Features
Of course, it wouldn’t be a Tesla keynote without showing off some new things. The Semi will be available in 500-mile and 300-mile range configurations, now featuring updated mirror designs and a drop-down glass section to improve visibility and allow easier interaction with external elements—such as control panels at ports, for example.
New Electric Power Take-Off (e-PTO)
The Tesla Semi will also feature a new capability called Electric Power Take-Off, or e-PTO system. Similar to the PTO systems found on other vehicles, this will allow the Semi’s high-voltage battery to power auxiliary equipment at variable voltages. That includes being able to power things like climate-controlled reefer trailers, potentially replacing the noisy and polluting diesel generators traditionally used for this purpose.
Charging and Batteries
Out of Spec BITS/YouTube
Tesla is also working on an updated battery pack design for the final production design of the Semi. This new pack is designed to be more cost-effective to manufacture. The battery pack itself is slightly smaller than before, but the truck maintains the same level of range through efficiencies. Dan also confirmed during his keynote that the battery cells for the Semi will be sourced domestically inside the United States, helping to alleviate potential burdens due to tariffs.
On the charging front, Tesla is using MCS - the Megawatt Charging System - capable of 1.2MW - and designed specifically for Semi. The system uses the same V4 charging hardware found at Supercharger sites but focuses on that larger power output. Alongside a smaller physical footprint, Tesla will be able to configure these V4 cabinets for either dedicated Semi charging or for shared power scenarios with regular Superchargers. Tesla is also working on an integrated overnight charging product, but Tesla isn’t ready to talk about it yet.
46 Semi Charger Sites Coming
The 46 new MCS sites coming soon.
Out of Spec BITS/YouTube
Finally, Tesla has made substantial investments in a public charging network for the Semi. There are currently 46 sites in progress throughout the United States, and plans for significant expansion throughout 2026 and 2027. These sites are strategically located alongside major truck routes and within industrial areas to support long-haul and regional operations. Tesla is aiming to offer the lowest possible energy costs to operators to help incentivize adoption.
This was one of the best updates to the Tesla Semi we’ve received since its initial unveiling. It seems that the Semi will receive a big portion of Tesla’s attention in 2026, while Robotaxi and FSD Unsupervised take the stage this year.
The Tesla Semi has the potential to transform transportation even more dramatically than EVs already have, serving as a testament to Tesla’s mission to electrify the world.
Sentry Mode is an invaluable tool for owners - capable of keeping the vehicle safe and secure even when you’re not around. This is especially true in recent times, with the misguided and unfortunate incidents surrounding Tesla ownership, including damage to Tesla vehicles, showrooms, and Superchargers.
B-pillar Camera Recording and Dashcam Viewer
With the 2025 Spring Update on 2025.14, Tesla is expanding Sentry Mode’s functionality for certain vehicles with some much-needed changes. Sentry Mode and Dashcam can now record footage from the vehicle’s B-pillar cameras. These cameras are located on the side pillars of the vehicle, between the front and rear doors.
This adds two crucially needed viewpoints, making Tesla’s Sentry Mode a truly 360-degree security system. These cameras also provide the best angles for capturing license plates when parked, so they will be greatly appreciated by owners in the event of an incident.
These vehicles are also receiving an improved Dashcam Viewer, which now displays the six camera feeds along the bottom and a new grid view. It also allows users to jump back or forward in the video in 15-second increments.
However, to the disappointment of many owners, not all vehicles are receiving these updates due to the additional processing power needed.
Limited to Hardware 4 Vehicles, Ryzen Isn’t Enough
We have confirmed that Tesla is only adding the additional camera recording and improved Dashcam Viewer on hardware 4 (HW4 / AI4) vehicles. The newer hardware presumably has the additional processing power and bandwidth needed to handle recording and saving the two additional video streams during Sentry Mode and Dashcam.
For the time being, owners of HW3 vehicles are not receiving this feature. This includes all vehicles with HW3, even those with AMD Ryzen infotainment systems. If you’re not sure whether your vehicle has HW3 or HW4, you can refer to our FSD hardware guide.
While there’s no doubt that recording two additional camera streams would be more computationally intensive, we hope that Tesla adds the improved Dashcam Viewer to HW3 vehicles in a future update.
Cybertruck Also Missing Improved Sentry Mode
Surprisingly, and most confusing for many - is the fact that the Cybertruck is also not receiving the improved Dashcam Viewer and B-pillar camera recording with this update. This struck us as odd, especially since the Cybertruck is currently the only vehicle with the improved, more efficient version of Sentry Mode.
Every Cybertruck is equipped with HW4 and AMD Ryzen infotainment units, so this clearly isn’t a hardware restriction. It’s possible the more efficient Sentry Mode is playing a role here due to the infrastructure changes. However, we expect Tesla to address this in a future update and eventually release these features for the Cybertruck as well.
Given the Cybertruck’s high visibility and its status as a frequent target for both positive and negative attention, many owners hoped that the Cybertruck would be one of the vehicles to receive this feature.
Adaptive Headlights
Tesla finally started rolling out its adaptive headlights in North America. While the new Model Y already came with the feature when it was released last month, other vehicles with matrix headlights are now receiving the feature in the Spring Update.
All vehicles with matrix headlights are receiving this feature, which includes the new and old Model 3, first-gen Model Y, and the new Model S and Model X.
If you’re not sure if your vehicle includes matrix headlights, check out our guide. What’s interesting here is that older vehicles that were retrofitted with matrix headlights due to an accident or user replacement are also receiving the adaptive headlights feature.
Legacy Model S & Model X
As with most updates, the older legacy Model S and Model X are not receiving all the features included in this update. Unfortunately, some of the features, which include the Blind Spot Camera on the instrument cluster, Save Trunk Height Based on Location and Keep Accessory Power On are limited to the new Model S and X.
Legacy S and X models will receive the Alternative Trip Plans feature, Avoid Highways (Requires Intel MCU) and the Keyboard Languages feature.
These vehicles are also receiving all the features in the Minor Updates section except for the visualization showing how far the door is opened, which is exclusive to the Cybertruck. These additions include improved music search results, contact photos in the phone app, automatic connecting to hotspots, the ability to show third-party chargers, view Supercharger amenities, and various improvements to music services.
While many users will be disappointed not to receive the B-pillar camera recording and Dashcam Viewer improvements, it’s important to remember that Tesla typically does a great job at bringing features to older vehicles, at least with the Model 3 and Model Y. If a feature isn’t added, it’s usually due to a hardware limitation.
![Tesla Semi Keynote: New Features, 46 Charging Sites, Upgraded Battery & More [VIDEO]](https://www.notateslaapp.com/img/containers/article_images/semi/semi-new-features.jpg/c7df4e0d32f8cb0beee080ad201e943b/semi-new-features.jpg)
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