Tesla has released FSD Beta 11.4.1 update to employees, featuring significant architectural improvements that Elon Musk says should arguably qualify it as version 12.0. This update is more than just bug fixes. It contians new release notes, which likely build on top of the features from FSD Beta 11.4 version, which never made it beyond employee testing. In includes many enhancements that should make driving smoother and safer than ever.
Enhanced Control and Smoothness in Driving
The FSD Beta 11.4.1 update offers improved control through turns and overall smoothness by refining various aspects of lanes, lines, road edges, and restricted spaces. This results in a significant boost in the perception of lanes in city streets, forks, merges, and turns, thanks to an expanded and cleaner training set and an updated lane guidance module.
Boosted Perception and Detection Capabilities
With the addition of lane-guidance inputs to the Occupancy Network, the update delivers improved detections of long-range roadway features, reducing false negative median detections by 16%. Additionally, the update enhances motorbike recall by 8% and vehicle detection precision, making the system more robust against variances in vision frame rate.
Assertiveness and Lane Management Improvements
The FSD Beta 11.4.1 update showcases improvements in Tesla's assertiveness when dealing with crossing pedestrians, allowing the vehicle to cross safely before the pedestrian when possible. In addition, interventions caused by other cars cutting into the Tesla's lane have been reduced by 43% thanks to a new framework that anticipates such actions and proactively adjusts the car's position.
Speculating on the Release Date for Public Testers
The release date for FSD Beta 11.4.1 to public testers remains uncertain. Since version 11.4 has been in testing with some employees for three weeks, and 11.4.1 is a revision, we could see the update roll out to select public testers within the next few days. However, Tesla could also wait for another revision before releasing it more widely, depending on the success of the current testing phase. It's also unlikely this version will be given out as a one-month free trial.
An Unusual Version Number in Tesla's Update History
The choice of version number for the FSD Beta 11.4.1 is peculiar, but it isn't the first time Tesla has used unconventional version numbers this year. It remains unclear whether this update includes any features beyond those in the 2023.6 branch. Other unusual releases include 2022.45, 2023.2, and 2023.6, which deviate from Tesla's typical version naming.
Additional Features in FSD Beta 11.4.1
Even if FSD Beta 11.4.1 only includes features from the 2023.6 update, it will still be a significant upgrade for current testers on the 2022.45 FSD branch who are missing features from the 2023.2 and 2023.6 updates. Some notable features introduced in these updates include Sentry Mode Lighting improvements, improvements to Apple Music and more.
This FSD Beta update is also expected to include features from Beta 11.4, which includes enhanced navigation planning, improved vehicle handling in challenging weather conditions, better speed control in parking lots and during lane changes.
Tesla's FSD Beta 11.4.1 represents an exciting expansion of the features introduced in version 11.4 and subsequent updates. With major architectural improvements, enhanced control and smoothness, advanced perception and detection capabilities, and additional features from updates 2023.2 and 2023.6, this upgrade promises a significant step forward in Tesla's Full Self-Driving technology.
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 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.
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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