Tesla has publicly released FSD Beta v11.3.1 to some owners
Tesla
After many months of waiting, Tesla has finally released its next major update to FSD Beta. Early this morning Tesla released FSD Beta v11.3.1 to some of its customers.
Most of the customers that received this latest beta were part of Tesla's initial 1,000 public beta testers. This means that only a fraction of a percentage of FSD Beta users have access to this latest beta.
According to the NHTSA, Tesla now has over 362,000 owners who have FSD Beta installed on their vehicles.
Per Elon Musk's previous comments on Twitter, Tesla expects to release bug fixes to this beta before releasing this beta out more widely. He expects FSD Beta v11.3.2 to be the one that goes out widely to Tesla's customers.
Big Improvements with 'OTA Recall'
Another major change that we're seeing with FSD Beta v11.3.1 is the inclusion of fixes that address the NHTSA's concerns with the beta.
The NHTSA brought up several concerns with Tesla's FSD Beta in mid-February and Tesla paused the release of FSD Beta to new owners until the issues were addressed.
However, Tesla wasted no time addressing these issues by including fixes in FSD Beta 11.3.1 less than a month later.
The fixes address several safety issues, including the vehicle being more cautious when approaching yellow lights. According to the release notes FSD Beta will now take more things into account before going through a yellow light; considering things such as the amount of time needed to stop, time needed to drive through the intersection, the position of the vehicle, and the amount of time before the light turns red.
This is certainly impressive, and while it's essentially what we as humans do when encountering a yellow light, the precision and speed that FSD Beta can likely calculate these values will likely be far better than a human's.
Another large fix addresses how the vehicle sets its speed and handles speed limit signs. Previously the vehicle would determine its speed based on the speed limit and the driver's chosen speed offset. However, the problem was that the vehicle would only adjust its speed once it had passed a new speed limit sign, causing it to be over the speed limit for a certain period.
With this update, FSD Beta will now adjust the vehicle's speed before reaching a detected speed limit sign. The vehicle will also be more assertive in slowing down if the new speed limit sign is much lower than the vehicle's current speed.
Voice Drive-Notes
With this beta Tesla has included 'voice drive-notes.' This appeared to be Tesla's replacement for the snapshot button, although early testers appear to have both, the snapshot button and voice drive-notes. Upon a disengagement, the driver is presented with a chance to provide more detailed feedback on the disengagement through an audio recording.
Ironically, this feature doesn't appear in Tesla's FSD Beta v11.3.1 release notes like it did in v11.3, but according to beta testers the feature is there.
Tesla's improvements to AEB went beyond the standard functionality, adding the ability to detect and react to vehicles that cross the car's path or steal the right of way, such as a vehicle that runs a red light or cuts off the Tesla.
According to Tesla, nearly half of the collisions of this nature would be avoided with this newly expanded system. From Tesla's release notes in FSD Beta v11.3, Tesla stated:
Expanded Automatic Emergency Braking (AEB) to handle vehicles that cross ego's path. This includes cases where other vehicles run their red light or turn across ego's path, stealing the right-of-way. Replay of previous collisions of this type suggests that 49% of the events would be mitigated by the new behavior. This improvement is now active in both manual driving and autopilot operation.
This feature is also not mentioned in Tesla's release notes for v11.3.1 so it's unclear whether it's just not mentioned like Tesla's voice drive-notes, or if the feature is not included in this update. It's certainly understandable if Tesla needs to test it further, as v11.3 was an internal-only beta and not all features are expected to be in the following public release.
Different Release Notes
There may be other differences between FSD Beta v11.3.1 and v11.3 since the release notes vary quite drastically. However, it's not clear if Tesla simply chose to highlight different features in the release notes of the public release.
Release to All
As with most Tesla updates, expect this update to roll out slowly as Tesla closely monitors it. Depending on issues discovered, Tesla may either expand the update to more owners or choose to address issues before distributing it further.
In the past, it has taken up to a month before the latest FSD Beta is available to all available owners. Before sure to check out the release notes for FSD Beta v11.3.1 to see everything that's included.
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.
At the 2025 Consumer Electronics Show, Nvidia showed off its new consumer graphics cards, home-scale compute machines, and commercial AI offerings. One of these offerings included the new Nvidia Cosmos training system.
Nvidia is a close partner of Tesla - in fact, they produce and supply the GPUs that Tesla uses to train FSD - the H100s and soon-to-be H200s, located at the new Cortex Supercomputing Cluster at Giga Texas. Nvidia will also challenge Tesla’s lead in developing and deploying synthetic training data for an autonomous driving system - something Tesla is already doing.
However, this is far more important for other manufacturers. We’re going to take a look at what Nvidia is offering and how it compares to what Tesla is already doing. We’ve done a few deep dives into how Tesla’s FSD works, how Tesla streamlines FSD, and, more recently, how they optimize FSD. If you want to get familiar with a bit of the lingo and the background knowledge, we recommend reading those articles before continuing, but we’ll do our best to explain how all this synthetic data works.
Nvidia Cosmos
Nvidia’s Cosmos is a generative AI model created to accelerate the development of physical AI systems, including robots and autonomous vehicles. Remember - Tesla’s FSD is also the same software that powers their humanoid robot, Optimus. Nvidia is aiming to tackle physical, real-world deployments of AI anywhere from your home, your street, or your workplace, just like Tesla.
Cosmos is a physics-aware engine that learns from real-world video and builds simulated video inputs. It tokenizes data to help AI systems learn quicker, all based on the video that is input into the system. Sound familiar? That’s exactly how FSD learns as well.
Cosmos also has the capability to do sensor-fused simulations. That means it can take multiple input sources - video, LiDAR, audio, or whatever else the user intends, and fuse them together into a single-world simulation for your AI model to learn from. This helps train, test, and validate autonomous vehicle behavior in a safe, synthetic format while also providing a massive breadth of data.
Data Scaling
Of course, Cosmos itself still requires video input - the more video you feed it, the more simulations it can generate and run. Data scaling is a necessity for AI applications, as you’ll need to feed it an infinite amount of data to build an infinite amount of scenarios for it to train itself on.
Synthetic data also has a problem - is it real? Can it predict real-world situations? In early 2024, Elon Musk commented on this problem, noting that data scales infinitely both in the real world and in simulated data. A better way to gather testing data is through real-world data. After all, no AI can predict the real world just yet - in fact, that’s an excellent quantum computing problem that the brightest minds are working on.
Yun-Ta Tsai, an engineer at Tesla’s AI team, also mentioned that writing code or generating scenarios doesn’t cover what even the wildest AI hallucinations might come up with. There are lots of optical phenomena and real-world situations that don’t necessarily make sense in the rigid training sets that AI would develop, so real-world data is absolutely essential to build a system that can actually train a useful real-world AI.
Tesla has billions of miles of real-world video that can be used for training, according to Tesla’s Social Media Team Lead Viv. This much data is essential because even today, FSD encounters “edge cases” that can confuse it, slow it down, or render it incapable of continuing, throwing up the dreaded red hands telling the user to take over.
Cosmos was trained on approximately 20 million hours of footage, including human activities like walking and manipulating objects. On the other hand, Tesla’s fleet gathers approximately 2,380 recorded minutes of real-world video per minute. Every 140 hours - just shy of 6 days - Tesla’s fleet gathers 20 million hours of footage. That was a little bit of back-of-the-napkin math, calculated at 60 mph as the average speed.
Generative Worlds
Both Tesla’s FSD and Nvidia’s Cosmos can generate highly realistic, physics-based worlds. These worlds are life-like environments and simulate the movement of people and traffic and the real-life position of obstacles and objects, including curbs, fences, buildings, and other objects.
Tesla uses a combination of real-world data and synthetic data, but the combination of data is heavily weighted to real-world data. Meanwhile, companies who use Cosmos will be weighting their data heavily towards synthetically created situations, drastically limiting what kind of cases they may see in their training datasets.
As such, while generative worlds may be useful to validate an AI quickly, we would argue that these worlds aren’t as useful as real-world data to do the training of an AI.
Overall, Cosmos is an exciting step - others are clearly following in Tesla’s footsteps, but they’re extremely far behind in real-world data. Tesla has built a massive first-mover advantage in AI and autonomy, and others are now playing catch-up.
We’re excited to see how Tesla’s future deployment of its Dojo Supercomputer for Data Labelling adds to its pre-existing lead, and how Cortex will be able to expand, as well as what competitors are going to be bringing to the table. After all, competition breeds innovation - and that’s how Tesla innovated in the EV space to begin with.
