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: Feb 12, 4:33 am 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.

Tesla Smoking While Supercharging? A Look at What's Actually Happening

By Karan Singh
Hot_Engineering3140 on Reddit

Winter is here, and temperatures are dropping, so one of the most common Tesla questions is about to resurface.

If you’ve landed here after frantically searching about “smoke” coming from your Tesla while Supercharging, take a deep breath—it’s completely normal.

Tesla Smoking While Charging

If you’re Supercharging in freezing weather—even with preconditioning—you might notice steam rising from your Tesla. But rest assured, your car isn’t smoking.

Your Tesla’s heat pump is hard at work warming both the cabin and battery to keep you comfortable and ensure optimal charging temperatures. Over time, condensation and ice build-up in the heat exchanger coils.

Why Does It Happen?

When you reach a Supercharger with your vehicle, the heat pump is still running hot, but without the cold air from driving to keep the heat exchanger coils cool, the ice and condensation quickly start to evaporate—creating what looks like smoke.

Since this typically happens near the front of the vehicle, where a car would traditionally have an engine, new vehicle owners can be startled by the discovery. However, rest assured that it’s just water vapor and it’s completely normal in cold weather.

In fact, this behavior can be experienced in any EV with a heat pump in cold climates. So, if you saw steam coming out of your vehicle and panicked, don’t worry—you’re not alone.

Now that you know what’s happening, go ahead and Supercharge with confidence.

Tesla Improves YouTube App With Smoother Playback

By Karan Singh
Not a Tesla App

Tesla made a lot of improvements in the 2024 Holiday Update, including more than 15 undocumented improvements that were included in the release. One of these was a stealthy performance improvement to the YouTube app.

Several people have mentioned they’ve seen improved performance on YouTube since this year’s Holiday Update - and there’s an interesting reason why.

YouTube Improvements

The improved YouTube performance in Tesla vehicles comes from an unexpected source—Tesla actually rolled back support for YouTube’s newer AV1 video encoding. Instead, vehicles now default to the older VP9 encoding standard.

While AV1 is highly efficient in terms of bandwidth, it requires considerably more processing power to decode and display videos. VP9, on the other hand, is less computationally demanding but uses more bandwidth to achieve the same video quality. This trade-off means smoother playback and better overall performance, even if it comes at the cost of slightly higher data usage.

Intel Inside

The VP9 video codec that the YouTube app is now using is much easier to decode, making it less taxing on the vehicle’s processor. This change is particularly beneficial for Tesla vehicles with Intel processors, which previously struggled to stream video at just 720p. When using AV1, these vehicles often experienced stuttering, sometimes forcing the YouTube app to automatically downgrade playback to 480p.

With this update, Intel-based Teslas should now be able to stream at 1080p smoothly. Streaming at 1440p is also possible, although occasional stutters still occur as the system keeps up with the decoding process.

Intel-based vehicles are the big winners with this change, but this appears to affect AMD Ryzen-based infotainment units as well, providing even smoother playback.

Chromium Web App

Tesla’s Theater apps aren’t native applications; instead, they run as chromeless web apps, leveraging the open-source browser built into Teslas known as Chromium (the open-source version of Chrome). Although this works quite well, there is a severe limitation - Chromium hardware acceleration isn’t supported on Linux, the operating system Tesla uses for their OS.

As a result, Tesla vehicles rely on software decoding instead of hardware decoding, which would otherwise handle video playback far more efficiently. A potential solution could be for Tesla to transition away from Chromium-based web apps in favor of a Mozilla Firefox-based browser, as Firefox does support hardware acceleration on Linux. This switch could also open the door to better streaming performance and the possibility of expanding Tesla’s in-car entertainment options.

However, Tesla’s choice of Chromium likely stems from Digital Rights Management (DRM) requirements for streaming services like Disney+ and Netflix, which rely on DRM-enabled playback. Firefox on Linux has had inconsistent support for DRM due to codec availability and variations in operating system versions.

We’re hopeful that Tesla will either adopt Firefox or develop a fully native application to improve video streaming, rather than continuing with the current web-based Tesla Theater. This shift could also pave the way for additional in-car applications built on Tesla’s native Linux environment—perhaps even reviving the long-rumored Tesla App Store.

Regardless, this update is a welcome improvement, particularly for YouTube, which remains one of the most widely used Theater Mode apps due to its accessibility, free content, and mix of short and long-form videos. It remains to be seen whether similar improvements are made for Netflix, Disney+, or other streaming platforms.

If you’ve noticed improved performance in Theater Mode, now you know why.

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