Tesla FSD 12.4 has yet to go out to most eligible customers, but last night it took a big step toward achieving that. FSD v12.4.3 went out to the largest batch of FSD vehicles in North America so far, more than tripling the number of users on the latest Tesla FSD software.
Update: Another wave of FSD 12.4.3 just started going out this evening. This wave just started and it’s already the largest wave for this release. It’s estimated to be about 12% of FSD users.
Most vehicles with FSD in North America are now on update 2024.14.9 which includes FSD 12.3.6. However, these vehicles have been on this FSD version since it was first introduced with update 2024.3.25. About 25% of the Tesla fleet is on update 2024.14.9, which is almost exclusively vehicles that have bought or subscribed to FSD.
Before yesterday’s rollout, FSD 12.4.3 stood at about 1.3% of the entire fleet (not just FSD vehicles), but after yesterday’s release, about 3.3% of the fleet now has access to FSD v12.4.3. That appears to be about 10% of FSD users that now have access to FSD 12.4.3. If Tesla doesn’t see major issues with this wave, this could be the point where FSD 12.4.3 finally goes into wide release and becomes available to most users in the next week.
Roll Out and Eligibility
We should hopefully see another rollout of FSD 12.4.3 later today or tomorrow. This latest FSD release is update 2024.15.15, which means that it’s available to anyone on a 2024.14 update or earlier. Users who have recently subscribed or resubscribed to FSD and are on update 2024.20 won’t be able to receive FSD 12.4 or later until it becomes available on a branch that is higher than 2024.20.
Tesla doesn’t merge FSD software with the main Tesla branches often so historically speaking, it could be another month or even two before that happens.
With FSD 12.4, Tesla has not only removed the steering wheel nag when the cabin camera can clearly see the driver, but it has also introduced a new strike system. Tesla will now remove one strike from the vehicle’s record (strikes are shared for all drivers of the vehicle), for every week the drivers’ of the vehicle go without receiving an Autopilot strike.
However, with the release of FSD 12.4.3, Tesla is also resetting all vehicle strikes to zero so that drivers’ have a clean slate to start with.
Vision-Based Monitoring
In place of the steering wheel nag is the improved vision-based monitoring, which tracks the driver with the cabin camera. In update 12.4.2, Tesla specifically updated the release notes for vision-based monitoring to mention that the driver’s arms also need to be visible to the camera. Tesla also changed some language around when it uses the vision-based camera and when it relies on steering wheel torque.
Users who subscribe to FSD can sometimes pick whether they remain on the FSD track or the feature track of Tesla updates. If you subscribe to FSD and prefer to receive update 2024.20 instead of waiting for FSD 12.4.3, then you could let your FSD subscription lapse and Tesla will push update 2024.20 to your vehicle within a day. Keep in mind that your subscription needs to completely expire, not just be canceled.
The reason your vehicle remains on update 2024.14 is so that it remains eligible for FSD 12.4.3, however, when your FSD subscription expires, Tesla will send you the latest update your vehicle is eligible for. Right now that should be update 2024.20 for just about everyone. If you unsubscribe, you can immediately subscribe to FSD after you receive the latest update. However, doing so will mean that you won’t be eligible for FSD 12.4.3 or higher until the main FSD updates are based on a branch 2024.20 or higher, which may not be anytime soon.
Unfortunately, if you have bought FSD, then this isn’t an option for you. Hopefully, it won’t be long before another large wave of FSD 12.4.3 goes out.
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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.
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