Tesla’s latest set of updates has been fast-moving, with lots of bug fixes, and this fits with Musk’s philosophy of moving fast and breaking things. Some people are still on 2024.8.9, some are still on 2024.3.25, and some people are already on the 2024.14.8 Spring Update, and there’s also the brand-new 2024.20 update that just went out to employees for testing.
Let’s take a look at how Tesla’s software distribution system works, and why you are where you are.
Statistics
Before diving deep into how it all works, let’s get some statistics out of the way. We’ll be using the statistics we use here on the site, which are powered by TeslaFi.
The vehicles on each update
Not a Tesla App
As we can see, the tracked fleet is about 30% 2024.14 – the spring update; 2024.8 – Tesla’s previous major update, which contains FSD V11; and 2024.3 – the FSD V12.3 update. The remaining fleet on 2023.44 or other updates is fairly negligible, at around 10%.
So, about 65% of the tracked fleet has access to FSD V12, depending on their country of origin. The remaining 25% of the fleet only has access to FSD V11 if they’re in an eligible region.
FSD Update Track
When someone subscribes or purchases FSD in the U.S. or Canada, Tesla enables the FSD feature on that vehicle’s firmware, which currently could be either FSD v11 or FSD v12.
Once you’ve subscribed to FSD, you’re generally put on the ‘FSD Track,’ which means you’ll start receiving the latest FSD updates, like FSD v12.4. These updates are usually exclusive to FSD subscribers as they serve as a testing ground for the latest FSD revision. They’ve been update versions such as 2024.9.5, 2024.3.25, 2023.27.5 and so on. In the past year or so, they’ve all been odd week numbers, but that hasn’t always been the case.
However, the downside is that Tesla develops FSD at a different pace, and while you’re one of the earlier individuals to test out the latest FSD version, these updates are usually several major updates behind Tesla’s latest, meaning you don’t always have access to Tesla’s latest features. Currently, these are owners on update 2024.3.25 who are waiting on FSD v12.4, but still don’t have the Tesla features in update 2024.8 or 2024.14.
Vehicle Eligibility
Not all vehicles are eligible for all updates, and this is a twofold reason. First, if you’re on an update that is on a newer branch, say 2024.8.9, you cannot go down to 2024.3.5. The version number is broken down to year, week number and revision. So update 2024.8.9 is the 9th revision of the update that was created on the 8th week of 2024.
In general, Tesla does not roll back versions, so if someone is already on update 2024.14, then their vehicle wouldn’t be eligible for FSD 12.4, which is update 2024.9.5. This is mainly due to potential issues since Tesla doesn’t thoroughly test rolling back software.
Your vehicle will always be eligible for updates on a later branch, even if you won’t necessarily receive that update – like the many owners on update 2024.8 or 2024.3 who haven’t received update 2024.14 yet.
The second factor is hardware. Vehicles on older hardware variants, or vehicles that are considered to be legacy, are just not eligible for some updates. This is something that Tesla decides as newer hardware is needed for newer features and support for legacy hardware may not be included in all updates.
If you’ve subscribed to FSD and you’re on update 2024.8.9 and wondering why you’re not receiving update 2024.14, that’s why. Tesla wants your vehicle to be eligible for the next FSD v12.4 update, which will be update 2024.9.5.
Vehicle Variants
Sometimes, updates are not sent out widely for the simple reason of hardware variants. Tesla’s fleet has become widely fractured over the years, with many different variants of vehicles on the road today. Some 2022 Model Y’s may have Matrix headlights, while some may not, and some may have USS, while others don’t. Most have HW3, but a few have HW4!
That’s 6 possible branching variants in one year – a total of 24 possible variants for just the 2022 Model Y, not including the Performance, Long-Range, Rear-Wheel Drive, 4680-cell Rear-Wheel Drive, and the odd 2022 Standard-Range Dual-Motor variants that are also all different! If you did the math, there are 362 thousand possible variants, but not likely more than ~40 or so actual builds that Tesla differentiates between for software for all vehicles.
That means a complex and well-thought-out update process has to be built in order to deploy a functional update to all these vehicle variants.
Bug Fixing
Besides the complexity of vehicle variants, Tesla also has to catch and fix bugs. No matter how good one is at software development, sometimes bugs just escape into the wild. And fixing those bugs is essential since they could leave a vehicle undriveable. Although a major issue is rare, Tesla has had some issues in the past, such as Automatic Emergency Braking being disabled due to a software issue. This is why Tesla rolls out updates gradually.
We’ve seen this play out with update 2024.14, which has received numerous bug-fix releases. Tesla will release an update to a set of cars, discover an issue, and stop the rollout. A few days later, another update is out with additional fixes, and so on.
Conclusion
So, if you’re stuck on update 2024.8.9 or 2024.3.25, and are wondering when you’ll get FSD V12 or the Spring Update, you’ll have to hang on – the author is also on 2024.8.9 with V11!
Elon Musk mentioned on X that FSD V12.4 should be the update the reduces FSD branching and will bring everyone to FSD V12 in general. 2024.9.5 is the FSD V12.4 update, and it looks like vehicles that are below that branch number should be collectively receiving the reduced-nag V12.4 update.
When we finally receive FSD V12.4, we’ll likely need to hang on for a little longer until FSD V12.4.1 or FSD V12.5 rolls along to have the Spring Update.
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Tesla has been quietly building something pretty unique on the streets of Hollywood—and we’ve been keeping a close eye on it. That’s right: the long-anticipated Tesla Hollywood Drive-In, Diner, and Supercharger is shaping up to be one of the most creative approaches to EV charging yet.
But this isn’t your average Supercharger site. It features a retro-futuristic, 24-hour diner and an outdoor movie theater, blending the charm of the 1980s with the tech-forward vibe of the 2020s.
Tesla hacker Greentheonly managed to spot some new evidence of changes within Tesla’s 2025.8.6 software build, which includes a new modal for “Charger Diner Controls”. While there isn’t anything to activate this new modal just yet, it is an indication of how Tesla intends to integrate the experience right into each and every Tesla.
The text in the modal reads: “Plug in, place your order, recharge” - which means that once you arrive and are plugged in, you’ll be able to place your order - and likely pay through Tesla’s payment system. It seems like this will all be done through either the Tesla app or the vehicle’s tocuh screen. No need to fumble with a separate app or pull out your wallet.
This is definitely a level of integration you just can’t have anywhere else - and just like any other Supercharger site, the Tesla Diner will appear as a suggested site for charging when you’re navigating or looking around the Hollywood area.
This is our best look yet at the two 45-foot LED screens at @Tesla's upcoming Hollywood diner and Supercharger.
We can also see the second Supercharger lot on the left with solar canopies. This will be one of the largest Supercharging spots in North America. pic.twitter.com/aWUe67M5vw
Those two absolutely gigantic 45-foot LED screens have now been turned on for the first time, meaning that Tesla is likely close to opening the Supercharger site. The screens were spotted displaying some test patterns, as well as some Tesla-themed content. It really brings the construction site to life - and it's the clearest sign that the Diner is well on its way to completion.
We’re hoping that this first Tesla Diner sees plenty of success - and that Tesla begins opening more of these types of facilities throughout North America, and eventually globally. Given Tesla’s penchant for unique Superchargers, we imagine this could truly be the case one day.
As Tesla continues to push the capabilities of its hardware as it prepares for autonomy with FSD Unsupervised, there has been a distinct divergence in features between HW4-equipped vehicles on FSD V13, and HW3-equipped vehicles on FSD V12.6.
There are definitely reasons for this, and Tesla hacker Greentheonly, over on X, went into great detail on some of the reasons why this divergence has continued and is likely to continue.
If you’re interested in some background, we recommend the following articles. Although they’re not necessary, you may enjoy reading them before diving right in if you enjoy this topic.
Back in the summer of 2024, we reported that Tesla’s HW4 had yet to reach its full potential, and that HW3 still had some compute to work with. However, FSD has undergone a rapid evolution - there are now fundamental differences driven by the hardware capabilities and sheer scale of the latest builds of FSD.
FSD V13’s Gargantuan Neural Networks
FSD V13 is a substantial leap for Tesla. It features substantially larger neural networks - the core brain that processes all the environmental data and makes decisions. Those networks are far larger in V13 than in V12, which results in a much smoother and human-like expereience.
Tesla’s FSD computers contain two nodes. According to Green’s analysis of FSD V13, Node B, which handles the actual end-to-end driving logic, tripled in size from 2.3 GB in V12 to a staggering 7.5 GB in V13. That’s a substantial increase, and one of the main reasons why HW3 can’t handle FSD V13. While Interestingly, Node A on HW4 remains similar in size to FSD V12, using up about 2.3 GB.
However, this massive size is also pushing the limits of HW4. While this isn’t necessarily a big problem immediately - at the end of the day, there is a limited amount of compute and ram available and model sizes will likely grow in the future. In fact, Tesla is planning to scale model sizes in the next FSD version and has already said they’ll need to optimize them, as context size is limited by on-board memory.
HW3 Limitations
Since HW3 can’t run the latest FSD models, where does this leave millions of Tesla vehicles equipped with the now-legacy FSD hardware? Are they hitting a dead end? Not exactly - Tesla has promised to replace HW3 computers with new units during the Q4 2024 Earnings Call, but only for those who have purchased FSD and only if Tesla is no longer able to update HW3 vehicles.
There’s no doubt Tesla hopes to achieve autonomy and then work backwards to make it compatible with HW3, but that’s unlikely to happen with the limited ram available on HW3.
Tesla’s AI team has continued to say that they’re still working on updating HW3 vehicles - but that they will be taking a backburner to updates for HW4 until the team can optimize the model efficiently enough to run on the smaller footprint. That means V12.6 isn’t just V13 “lite” - it is a distinctly different software branch tailored specifically for HW3’s capabilities.
Green's analysis showed that HW3 under V12.6 runs NNs totaling 1.2 GB on Node A and 3.1 GB on Node B, which is significantly smaller than the footprint of V13. Back in November, we discussed how Tesla is running a smaller and optimized FSD model on HW3, with the specific goal of achieving similar performance to V13. FSD V12.6 appears to be the current implementation of that smaller model strategy.
Green also found that of the total neural nets used for FSD, 135 are shared between the current V12.6 and FSD V13.2 releases, which is the result of Tesla’s AI team working to optimize and refine the V13 model for HW3. So some neural nets are shared between the two sets of hardware, while others are specific to HW3 or HW4.
AI4 in the Future
The fact that V13 is already stretching HW4’s limits makes us wonder about Tesla’s imminent release of AI5. Last year, Tesla mentioned that AI5 would be 18 months away - which is now about 8 months away, and potentially even sooner to help solve the autonomy problem.
At the same time, Tesla is looking to launch Unsupervised FSD in June in Austin, Texas, with presumably HW4, which would indicate that they’re confident in its capabilities.
Unless Tesla launches the Robotaxi network with AI5, we don’t believe AI5 will be a “must have” item. Undoubtedly, it will result in similar improvements to HW4 compared to HW3. However, the software needed to take advantage of the newer hardware could still be years away.
All eyes will be on Tesla’s Robotaxi network launch and the hardware required for it. For now, HW4 owners are in good hands with future updates are on the horizon, and we’re certainly excited for what’s next.