Tesla FSD V12.5.6 Introduces Major Improvements: A Look at All the Changes [Photos]

By Karan Singh
WholeMarsBlog on X

Tesla has just released software update 2024.32.30 to its early access customers this morning, with quite a few changes. What’s most exciting is that there isn’t a “Coming Soon” section in there, as this update includes all of those features.

This may mean that FSD v12.5.6 may be the big update that concludes FSD V12, as FSD V13 is already on the Tesla FSD Roadmap for October. But before we look too far forward, let’s take a look at what the early access folks received this morning.

Of course, this build includes Vision-Based Attention Monitoring, including sunglasses support, and end-to-end highway monitoring. It also includes " earlier and more natural lane change decisions,” “Updated Driver Profiles,” and “Auto Set Speed has been updated to Max Speed.”

Earlier and More Natural Lane Change Decisions

Since its inception, Tesla’s FSD has struggled to make natural lane change decisions, especially in advance of a coming turn or exit. Tesla has been working on improving when and how it makes these decisions, and this update should be the big one.

Early access testers have already mentioned that FSD V12.5.6 appears to make decisions a lot sooner than before, which is definitely a good thing. Previously, FSD would make decisions to get from the right lane into the left turning lane in under a few hundred yards (or meters) from the actual place you’re turning. This update should make everything much, much smoother.

Updated Driver Profiles

Tesla has replaced the three older FSD Modes with updated Driver Profiles instead (not to be mixed up with a Driver Profile that saves user preferences). Chill makes a come back here, but Average has been replaced with Standard, and Assertive has been replaced with Hurry. Hurry mode was previously announced by Elon in a post on X, and it has finally shown up a few short months later.

Tesla is a lot more clear on what each of these modes means, and how it’ll change the way FSD drives.

Chill

Chill says that it will drive in slower lanes with minimal lane changes. This one is going to be especially important because it seems like the minimal lane changes button is gone too. So if you want minimal lane changes for your drive – you’ll be on the Chill profile.

We expect Chill to stick to the right lane whenever possible – as that’s the “slow” lane in North America – and that should carry over to both the highway, as well as multi-lane roadways.

Standard

Standard is the new Average – it offers to drive at normal speed, adjusting with traffic. We’re not sure exactly what that means just yet, especially since Autospeed is gone (more on that below!), but it will likely work within the Max Speed to dynamically adjust based on how fast traffic around you is traveling.

If anything, Standard will be slightly more assertive and faster than Chill, but likely won’t be looking to park itself in the right lane or left lane – rather picking the more neutral center lane, especially on the highway.

Hurry

Hurry is the new mode, replacing Assertive. Hurry says that it will drive faster, with more frequent lane changes. It seems the intention of the Hurry Profile will be to get you to your destination just that much quicker.

Hurry will be fairly aggressive with its lane changes and its ability to drive faster. This means it will likely be looking for and taking opportunities to get ahead or through the flow of traffic where available. On the highway, this profile will likely bring you to the left lane, where you’ll be keeping up or passing traffic.

The Hurry Profile, in particular, will also be displayed when it’s in use, right next to the green attention-monitoring dot. It seems Standard and Chill currently do not display up there.

The FSD Profile Selection Screen
The FSD Profile Selection Screen
WholeMarsBlog on X

Auto Set Speed Has Been Replaced

On FSD V12.5.6, Autospeed is gone. It has been replaced with an updated version of its predecessor – Max Speed Offset. You can now set a Max Speed Offset for all FSD profiles, including negative offsets, to drive below the speed limit.

The maximum offset available right now is 40% - so if the limit is 50mph, your FSD speed limit will be 70mph. The minimum offset is also -40% - so at 50 mph, that’s 30mph.

This is definitely a new approach, as Tesla was previously working on letting its neural nets dynamically adjust the speed based on road and weather conditions, traffic around you, and road types (country vs low-density urban vs high-density urban).

We think Max Speed Offset will work very similar to Auto Set Speed, but with a clearer indication of the vehicle’s max speed. Previously on Auto, it wasn’t clear how fast the vehicle could go, just that the car was trying to determine the correct speed for the situation. Max Speed Offset is still expected to slow down for varying traffic and weather conditions.

Just like before, quick controls are available on the right scroll wheel.
Just like before, quick controls are available on the right scroll wheel.
WholeMarsBlog on X

When’s It Coming?

Okay, the big question everyone is waiting for. It's just hit early access testers on Model Y and Model 3 vehicles—with HW4. Assuming the build tests well, the earliest it will see customers will be sometime next week, likely with HW4 3/Y and Cybertrucks first, then the S/X, and then Hardware 3 in the coming weeks. However, this is just a guess based on previous releases. We hope HW3 vehicles get included much sooner.

Update 2024.32.30

FSD Supervised 12.5.6
Installed on 0% of fleet
0 Installs today
Last updated: Jan 13, 7:23 pm UTC

So, hang tight, keep an eye on our feeds, and we’ll let you know once the first wide customer builds of FSD V12.5.6 start rolling out.

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Tesla LFP Batteries Can Now Be Warmed up While Supercharging Using Innovative Feature

By Karan Singh
Not a Tesla App

Tesla’s been on a roll with Supercharger improvements lately, from the 325kW charging update for the Cybertruck, to 500kW with V4 Superchargers coming next year. While those improvements have been limited to the Cybertruck, Tesla didn’t put all their focus on their new flagship vehicle, but looked at their more affordable vehicles as well.

LFP Battery Heating

Tesla’s Superchargers can now heat LFP Batteries - those that are in the Model 3 and Model Y Rear Wheel Drive variants. This applies to Long Range and Standard Range models, which saw a limited run. This is another update included as part of the 2024 Tesla Holiday Update - which really arrived with a lot of unannounced new features and capabilities.

The change is pretty interesting - Superchargers of the V3 and V4 variety can now pre-heat batteries for Model 3 and Model Y vehicles equipped with LFP battery packs. That means those vehicles are able to get back on the road faster when it's extremely cold. Of course, Tesla still advises you to precondition before you arrive, saving drivers time and money.

Max de Zegher, Tesla’s Director of Charging, also commented on the new feature. Essentially, Tesla is inducing an AC (alternating) ripple current through the battery to warm it up. Keep in mind that Superchargers are DC charging. That means it is possible to get a cold-soaked LFP vehicle on the road 4x faster than before, assuming that it didn’t precondition at all and that it is in the worst-case scenario (below 0ºF).

In essence, Tesla is using some engineering magic to turn the circuits inside the LFP battery into an electric heater - and powering that heater through the Supercharger. An AC ripple current is a small oscillation in the DC charging current that generates heat through electrical resistance, warming up the battery. Those ripples are a byproduct of converting AC to DC and back - so Tesla is using the onboard charger to induce those ripples to warm up the battery. Definitely an innovative technique that’s really only possible with the versatility of the NACS connector.

We’re hoping Tesla can implement this across their full lineup of vehicles, but we’ll have to wait and see how it is trialed across LFP vehicles first and if it is even possible on vehicles with 2170 or 4680 battery packs.

Tesla Included FSD V12.6.1 and V13.2.4 in the Same Update: What Caused This and What It Means

By Karan Singh
Not a Tesla App

Tesla launched two FSD updates simultaneously on Saturday night, and what’s most interesting is that they arrived on the same software version. We’ll dig into that a little later, but for now, there’s good news for everyone. For Hardware 3 owners, FSD V12.6.1 is launching to all vehicles, including the Model 3 and Model Y. For AI4 owners, FSD V13.2.4 is launching, starting with the Cybertruck.

FSD V13.2.4

A new V13 build is now rolling out to the Cybertruck and is expected to arrive for the rest of the AI4 fleet soon. However, this build seems to be focused on bug fixes. There are no changes to the release notes for the Cybertruck with this release, and it’s unlikely to feature any changes when it arrives on other vehicles.

While this update focuses on bug fixes, Tesla’s already working on bigger features for FSD V13.3, which we have already confirmed to include improvements to highway following and speed control.

FSD V12.6.1

FSD V12.6.1 builds upon V12.6, which is the latest FSD version for HW3 vehicles. While FSD V12.6 was only released for the redesigned Model S and Model X with HW3, FSD V12.6.1 is adding support for the Model 3 and Model Y.

While this is only a bug-fix release for users coming from FSD V12.6, it includes massive improvements for anyone coming from an older FSD version. Two of the biggest changes are the new end-to-end highway stack that now utilizes FSD V12 for highway driving and a redesigned controller that allows FSD to drive “V13” smooth.

It also adds speed profiles, earlier lane changes, and more. You can read our in-depth look at all the changes in FSD V12.6.

Same Update, Multiple FSD Builds

What’s interesting about this software version is that it “includes" two FSD updates, V12.6.1 for HW3 and V13.2.4 for HW4 vehicles. While this is interesting, it’s less special when you understand what’s happening under the hood.

The vehicle’s firmware and Autopilot firmware are actually completely separate. While a vehicle downloading a firmware update may look like a singular process, it’s actually performing several functions during this period. First, it downloads the vehicle’s firmware. Upon unpacking the update, it’s instructed which Autopilot/FSD firmware should be downloaded.

While the FSD firmware is separate, the vehicle can’t download any FSD update. The FSD version is hard-coded in the vehicle’s firmware that was just downloaded. This helps Tesla keep the infotainment and Autopilot firmware tightly coupled, leading to fewer issues.

What we’re seeing here is that HW3 vehicles are being told to download one FSD version, while HW4 vehicles are being told to download a different version.

While this is the first time Tesla has had two FSD versions tied to the same vehicle software version, the process hasn’t actually changed, and what we’re seeing won’t lead to faster FSD updates or the ability to download FSD separately. What we’re seeing is the direct result of the divergence of HW3 and HW4.

While HW3/4 remained basically on the same FSD version until recently, it is now necessary to deploy different versions for the two platforms. We expect this to be the norm going forward, where HW3 will be on a much different version of FSD than HW4. While each update may not include two different FSD versions going forward, we may see it occasionally, depending on which features Autopilot is dependent on.

Thanks to Greentheonly for helping us understand what happened with this release and for the insight into Tesla’s processes.

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