The improvements in v12.5 are supposed to focus on rarer, more complex situations and vehicle-to-fleet communication. Tesla’s Autopilot lead, Ashok Elluswamy, also mentioned that FSD would gain the ability to go in reverse around this time.
Merge City & Highway Stacks
FSD v12 has been a multi-stack setup so far, with a city-streets stack that is end-to-end, and an older highway stack that was carried over from v11. FSD v12.5 will once again merge the city/highway stacks according to Musk, who confirmed the feature yesterday. That means that there will no longer be an implicit highway stack.
This could cause some regressions during highway driving, similar to the ones we experienced when Tesla first merged highway and city stacks back in FSD v11. Ultimately, when the issues were ironed out, we ended up with a smoother and better Autopilot experience on the highway. When FSD v12.5 rolls around, we may see some similar issues but expect FSD v12.5 to do to highways what v12 did for city driving.
Vehicle-to-Fleet Communications
Tesla’s FSD relies heavily upon maps, with the mapping information designating routing and lane changes. When vehicles encounter difficulties, they are unable to communicate that back to the rest of the fleet. This results in every vehicle encountering the same problem. With FSD V12.5, vehicles will be able to communicate road closures or other obstacles back to the rest of the fleet in real-time. This will turn FSD into software that’s constantly improving as the fleet gathers more data, instead of having to wait for a software update.
Cybertruck Finally Gets FSD
In a recent post on X, Musk also confirmed that V12.5 will finally bring FSD to the Cybertruck. Currently, all Cybertrucks only have access to Traffic Aware Cruise Control (TACC). Autopilot and FSD capabilities should arrive alongside all the other features.
Actually Smart Summon
Musk has talked quite a bit about Actually Smart Summon. With FSD 12.5, the new vision-based summon may finally be released. This will introduce Smart Summon capabilities to vision-only cars for the first time. However, it’s expected to be a drastic improvement for all vehicles in similar ways to the new Autopark. The new summon has been tied to the ability to move the vehicle in reverse by Tesla’s Autopilot lead, so expect either both of them to arrive in FSD 12.5, or be held off for a later release.
Release Date
Musk originally mentioned that FSD V12.5 would be released in late June, however, there were several delays with FSD 12.4 and that time frame has now come and gone. FSD 12.4 was initially released in May 2024, but it went through several lengthy revisions before it was introduced to public testers. Going by that time frame, it appears that FSD 12.5 was expected to be released about 4-6 weeks after FSD 12.4. If FSD 12.4.3 is finally got a good spot, we could see FSD 12.5 become available in the next 4-6 weeks or about late August.
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Tesla has released software update 2025.2.6, and while minor updates typically focus on bug fixes, this one introduces a major new feature. With this update, Tesla has activated the in-cabin radar, a sensor that has been included in some vehicles for more than three years but remained unused until now.
Why Not Vision?
Unlike vision-based systems, radar can precisely measure object dimensions and even detect movement behind obstacles by bouncing radio waves off surrounding surfaces. This allows for more accurate and reliable measurements of objects that vision may not even be able to see, such as behind the front seats.
What Tesla Announced
Tesla recently highlighted the 4D radar in the new Model Y, explaining how it will improve passenger safety. Tesla executives stated that the radar would be used to properly classify passengers and improve the way airbags deploy.
Tesla went on to say that in a future update, Tesla will use the in-cabin radar to detect any potential passengers left in the vehicles. Since radar can even pick up on heartbeat and breathing patterns, it can provide a much more accurate method of detecting children left in a vehicle. Tesla talked about how the vehicle will send owners a notification via the Tesla app and enable the HVAC system if it detects a passenger in the vehicle. It’ll even call emergency services if needed.
New Feature in Update 2025.2.6
Tesla has officially named this feature in update 2025.2.6, “First-Row Cabin Sensing Update,” which appears to align with the first portion of what Tesla discussed in the new Model Y video.
In the release notes, Tesla describes the update as:
“The first-row cabin sensing system has been updated to use cabin radar, which is now standard in all new 2025 Model Ys. Your Model Y was built pre-equipped with the necessary hardware, allowing Tesla to also bring this technology to your vehicle.”
For now, it appears that Tesla is using the radar to detect and classify passengers in the front seats. This could eventually replace traditional seat sensors, reducing the number of hardware components and lowering production costs.
Tesla plans to expand the feature later this year, bringing rear-seat passenger detection in Q3 2025. While Tesla talked about the feature for the new Model Y, we expect it to be available for all vehicles with the in-cabin radar.
Supported Models
Although Tesla is vague in their release notes, this feature is being added to all Model Ys that include a cabin radar. Tesla started including the cabin radar in 2022, but its availability may vary by region and model. The Model 3 didn’t receive the cabin radar until it was redesigned in 2024, while all Cybertrucks already include it.
The owner’s manual for the redesigned Model S and Model X doesn’t specifically mention the interior radar, although Greentheonly believes the vehicles also include one, so we’ll have to wait to determine whether those vehicles also receive this new feature.
At this time, the feature appears to be only going out to Model Y vehicles, but we expect it to become available on other supported models soon.
We love to see these kinds of updates. Tesla is increasing the safety of existing and new vehicles through a software update while also making them more affordable to own.
Tesla has updated the Tesla app to version 4.42.0, and this time, it’s more than just bug fixes. The app includes a new service interface, introduces support for the new Model Y, and, for the first time, includes some code for the Robotaxi coming later this year.
This update was released for iOS and should be available on Android within a few days.
Refreshed Model Y 3D Model
First up in the update is the introduction of the 3D model for the refreshed Model Y. Interestingly, while we all know it as Juniper, the file code name inside the update lists the vehicle as “Bayberry.” The Bayberry name was introduced in Tesla app update 4.41.5. Tesla’s internal code names sometimes change as the vehicle evolves - and we’ll continue to refer to it as the refreshed or new Model Y for ease of understanding.
A rear-angle shot of the Refreshed Model Y from the Tesla App
@olympusdev_ on X
As usual with Tesla’s 3D models in the app, there’s a lot of detail, although it’s not easy to see since you can pinch and zoom the model in the app. The 3D models used in the app are actually the same models that Tesla uses in the vehicle, although sometimes they include different lighting effects, but they’re all highly detailed.
Robotaxi API
Tesla has added a new endpoint in their app for Robotaxi - and it’s the very first Robotaxi or Cybercab-related item we’ve seen in the app. With the Robotaxi fleet launching in June, according to Tesla, it looks like they’re now adding support to the Tesla app.
What the Robotaxi interface is supposed to look like in the future.
Not a Tesla App
The new app API is called “rides_feedback_upload,” which seems pretty explanatory. Tesla will need to gather a lot of information on ride quality and all the little things in between. What better way than to get feedback directly from users?
While Tesla previously released prototype images of what the Robotaxi app will look like, the introduction of this API into the Tesla app leads us to believe that Tesla will utilize the current app for Robotaxi use.
Updated Service Interface
The Updated Service Panel in the Tesla App
Not a Tesla App
Tesla has released an updated UI for the Tesla Service panel, and we have a ton of details on these changes. This new pane displays appointment details more prominently. If you have a service appointment scheduled, you’ll now see a lot more details on the main service screen. The app will now display:
Your current service status
Appointment date and time, which you can now tap on to add the event to your calendar
Address and hours of the service center. You can now also tap on the address to open up the location in your maps app
There’s also a new appointment details screen (the right portion of the image). This screen displays additional details that were previously unavailable, such as your transport type. The app will display whether you’ll get a loaner vehicle, demo vehicle, or something else.
There are a ton of user experience (UX) improvements in this update regarding service, including clearer language, improved UI fixes to images, and more.
Tesla has been making a lot of positive updates to the Service-related sections of the app lately, and we’re happy to see these coming rapid-fire. Tesla Service is now easier to use and understand. In the previous app update, Tesla also added the ability to pull down to update the service screens.
![The Design & Engineering Behind the New Model Y [Video]](https://www.notateslaapp.com/img/containers/article_images/model-y-2025/2025-model-y-speaker.webp/e933556c6b2b4ce77ab652524f3a8ac0/2025-model-y-speaker.jpg)
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