Optimus was a major point of coverage at the 2024 Tesla Shareholder meeting, and we’ll help break down some of the key points for those interested in Tesla’s future humanoid robots.
What Is It?
Optimus is Tesla’s humanoid robot, built entirely in-house, from the batteries to the motors and actuators in the arms, legs, and hands. Tesla has taken a unique design approach to Optimus and intends to have it replace humans in mundane or risky tasks.
It is a bipedal robot, built around the same aspect as the human body. Optimus was originally unveiled in August 2021 and has since seen several major design iterations. And those aren’t the only ones, Optimus is scheduled to undergo at least one more major design revision this year, as well as one more major design revision for its hands – which will feature 22 degrees of freedom.
In comparison, the human hand has 27 degrees of freedom – Tesla is quite close to replicating the complexity of a hand in its custom-designed hands. Musk mentioned that with the 22 degrees of freedom, Optimus is capable of learning and playing music on a piano – an intricate task that many humans find difficult today.
Best of all, they’ve placed the immense learning prowess of FSD behind its brains – each Optimus unit runs similar hardware and software as Tesla cars . It can also navigate autonomously, using the same object recognition and learning that Tesla’s cars use every day. Optimus learns from watching humans do things or can be taught how to do something by a remote operator. Elon Musk also mentioned that it will eventually be able to watch a video and learn how to do a task.
What Can It Do?
Elon Musk has mentioned that Optimus’ primary goal is to replace humans in certain tasks, especially those that could put a human at risk. This could be anything from being a humanoid companion or caretaker, a construction worker, or even working in factories. Of course, it has a focus on high-precision tasks, owing to its intricately designed hands, and is intended to replace human workers doing everyday precision work that robots today cannot do.
The primary goal is to have Optimus robots begin working in factories, and to this end, two have been deployed to one of Tesla’s factories, and are working on the battery cell assembly lines in a prototype and testing deployment. Today, these two units are moving battery cells off the production line and into shipping containers.
2:1 Robot to Human Ratio
There are some ambitious plans for Optimus – Elon Musk envisions that there will be 2 humanoid robots for every human on the planet in the future. This is alongside an eye-watering build rate of 1 billion humanoid robots a year – of which Tesla intends to build at least 100 million per year or more.
With these numbers, Tesla sees the market cap for Optimus as double that of FSD – approximately $20 trillion, with an expected profit of $1 trillion per year at scale. That’s an expected profit of $10,000 per unit, which will be quite the achievement.
When’s It Coming?
Given the fact that Tesla still has design revisions planned, scale production isn’t starting anytime soon. However, Elon Musk did mention that Tesla currently plans to have approximately 1000 to 2000 Optimus units deployed for internal use in Tesla factories by the end of next year. This limited production run will be the start of Tesla’s larger Optimus deployments and will serve to help them refine the FSD stack that runs Optimus, helping teach it the many tasks it could do in a factory.
Costs
The next big question is what it will cost. Musk has mentioned that it will cost less than a car – with an expected cost of $20,000 USD, once large-scale production kicks off. Just like the Cybertruck, that means initial adopters will be faced with fairly high adoption costs for the initial production runs. Economies of scale will eventually lower the cost as more units are produced.
One of Tesla’s significant challenges will be scaling to reduce these costs. Currently, each unit is hand-built in Tesla’s Optimus labs. Eventually, this will have to scaled up to a proper production line, which will require a factory. Optimus also uses 4680 cells, which means some production of the newer 4680 batteries will be required to produce Optimus.
So perhaps, someday soon, there will be an Optimus knocking on your door, delivering itself to help you take care of your home. Definitely a bright future to look forward to.
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Tesla vehicles are equipped with two main computer systems: the MCU (Media Control Unit), which is responsible for entertainment and display functions, and the Autopilot/FSD Unit, often referred to as the FSD Computer.
Both of these systems have evolved over the years, and they’re commonly referred to by their generation. For example, MCU 2 refers to the second generation of the Media Control Unit. Similarly, the FSD computer is identified by its generation, often called Hardware 3 or Hardware 4, when referring to the third and fourth-generation hardware. More recently, Tesla has started referring to the FSD Computer as AI3 and AI4, but you’ll still hear the older terms used interchangeably.
These two systems are separate and they’re not upgraded at the same time, meaning it’s possible to have a vehicle with MCU 2 and FSD Hardware 3 or MCU 3 with Hardware 3. Some vehicles even feature MCU 1 alongside Hardware 3.
The MCU is not involved with Autopilot or FSD functions—it’s purely for infotainment and in-vehicle features such as vehicle visualization, gaming, maps, and entertainment. It doesn’t impact the capabilities or limitations of Tesla’s autonomous driving systems.
MCU 1 - NVIDIA Tegra 3
MCU 1 was the first media control unit to be introduced in Tesla vehicles, starting back in 2012. This system was used in the Model S and Model X until about April 2018, when Tesla began transitioning to MCU 2.
By the time the Model 3 launched in late 2017, it already included MCU 2. To keep legacy vehicles up to date, Tesla offers an infotainment retrofit that upgrades MCU 1 to MCU 2, which helps make the infotainment unit much more responsive and adds a variety of newer features. Tesla continues to support vehicles with MCU 1, although upgrades are much further apart. In 2024, Tesla added Automatic Emergency Braking (AEB) improvements to vehicles with MCU 1 and even support for FSD V12.3.6 (FSD HW3 required).
Period Offered: 2012 through April 2018
Upgrade: Available as a paid upgrade for Model S and Model X vehicles to go from MCU 1 to MCU 2.
MCU 2 - Intel Atom
The launch of the Model 3 introduced MCU 2, which ran on Intel’s Atom mobile processor. While the Intel Atom was capable at the time, it’s now considered outdated compared to modern standards. As Tesla continues to roll out new features, the limitations of the Atom processor have become more apparent.
There is a notable list of features that are unavailable to vehicles with MCU 2. Although Tesla has optimized software to improve compatibility, not all features have been made accessible to these vehicles.
Period Offered: MCU 2 was offered in 2017 (Model 3) through 2022 (availability differs based on region and model).
Upgrade: As of now, Tesla has not offered an upgrade path or retrofit to transition from MCU 2 to MCU 3, and they’re unlikely to do so.
MCU 3 - AMD Ryzen
In December 2021, Tesla began shipping vehicles with MCU 3, powered by AMD’s Ryzen processor. The first vehicles to feature MCU 3 were the refreshed Model S and Model X, which debuted in 2021. Shortly after, Model 3s and Model Ys were also equipped with MCU 3, and today, all Tesla vehicles, including the Cybertruck, come standard with MCU 3.
This MCU is now the most widely used on the road and is Tesla’s most advanced infotainment processor. It supports impressive 3D visualizations, allows improved gaming on the center touchscreen (and rear screens in equipped vehicles), and offers a host of other capabilities. MCU 3 is also the most feature-complete version, with new features being designed for it first and then backported to MCU 2 or MCU 1 when possible.
Period Offered: The first MCU 3 vehicles were released in December 2021 and is current through today.
Upgrade: MCU 3 is the most current infotainment unit that Tesla offers.
Features Missing on MCU 2 (Intel Atom)
High-fidelity park assist is limited to vehicles with MCU 3
Not a Tesla App
While Tesla does its best to continue to support MCU 2, there is a growing difference between the features available on a vehicle with an Intel Atom infotainment unit and one with the AMD Ryzen processor.
Feature
MCU 2
MCU 3
Games / Arcade
⚠️ Limited Games*
✅ Additional Games**
Parked View
⚠️ Split screen visualization with vehicle on left and map on right
✅ Full-screen Parked Viz - Shadows, Sun Reflections, Shadows
Vehicle Visualizations
⚠️ Some limitations, such as non-transparent glass
Improved UI for Display Modules - Media, Next Turn, Trip Planner
⚠️ Solid Color/Semi-Transparent
✅ Transparency + Background Blur for Display Modules
*Many recent game additions are available to MCU 3 only, including the ever-popular Vampire Survivors and Castle Doombad. Only certain Model S and Model X vehicles include a GPU and the ability to play games on Steam.
Identifying which MCU your vehicle has is straightforward. Simply go to Vehicle Options > Software > Additional Vehicle Information.
In the interface, you’ll find details about whether your vehicle is equipped with an Intel Atom (MCU 2) or AMD Ryzen processor (MCU 3).
MCU 4?
It’s been more than three years since Tesla introduced the AMD Ryzen-powered MCU. Despite advancements, including the transition from FSD Hardware 3 to AI4—and eventually AI5—there’s been no indication of an MCU 4 on the horizon.
The Ryzen processor’s impressive capabilities make it a solid choice for infotainment, and it’s well-suited to serve until there’s another big leap in CPU performance.
While Tesla will upgrade to MCU 4 at some point, it doesn’t seem imminent. Some may argue that Tesla transitioned to MCU 3 too late, leaving vehicles just a few years old feeling outdated. It’s possible Tesla might choose to introduce MCU 4 ahead of the need for more processing power, ensuring that older vehicles can continue to benefit from new software features in the future.
Following the surprising return of the turn signal stalk on the refreshed Model Y, reliable Tesla source Chris Zheng has indicated that the Model 3 will also be receiving a turn stalk. While it initially seems surprising, Tesla mentioned that after receiving lots of customer feedback, there is a lot of demand for the return of the stalk.
For those who appreciate the newer turn signal buttons on vehicles like the Cybertruck, this might come as a surprise. However, the Model 3 and Model Y are designed for the average driver transitioning from a traditional vehicle, making the removal of the turn signal stalk an unexpected and potentially disappointing change.
Turn Stalk
In a conversation during the latest episode of Jay Leno’s Garage, Tesla’s VP of Vehicle Engineering, Lars Moravy, mentioned that Tesla works to remove superfluous parts. In this case, they removed one part too many - and are now bringing back the turn signal stalk.
The updated stalk on the refreshed Model Y is a simplified version of the current Model Y stalk. It doesn’t include multi-stage turn signals (short three flashes versus staying), buttons, or other features. Pure and simple - it is utilized for signaling left and right. The rest of the functions of a traditional stalk remain either on the wheel or on the screen.
Lack of Right ‘Shifter’ Stalk
Tesla has no intent to bring back the right stalk, which is traditionally used to shift the vehicle from Drive to Reverse and Park in Teslas. It’s also used to activate Autopilot. The shifting functionality will remain on-screen or available via the backup by tapping the buttons on the ceiling near the hazards button. Shifting via the dash is intuitive and convenient once you get used to it - and with AutoShift hopefully coming out of Beta sometime soon, this could get even better.
Autopilot activation will remain with a button on the steering wheel. While a vehicle with a single stalk may look a little odd at first, Lars mentioned that Tesla didn’t receive many complaints about shifting or Autopilot use.
Retrofit
Not a Tesla App
We haven’t heard anything about retrofitting the 2024+ Model 3s with the turn signal stalk at this point. However, we imagine this may be a possibility in the future.
However, we can recommend using the wireless Enhauto’s S3XY Stalks if you want to bring a single or dual stalks back to your refreshed Model 3 and don’t want to wait for an official retrofit to arrive. They’re easy to install, well-designed, and reliable.
Other Models
The big question now is: will Tesla bring back the turn signal stalk for its other models? It’s possible, but we doubt it. The Model S and Model X, especially with the Yoke, feel more natural without a stalk, and the button-based signals suit their design. While a stalk might occasionally be useful—like signaling in and out of a roundabout—any future refresh of the S or X would likely include steer-by-wire instead.
On the Cybertruck, the absence of a stalk goes unnoticed, thanks to steer-by-wire, as the squircle steering wheel is never in an awkward position. After thousands of kilometers of daily driving, including plenty of roundabouts, the author can confidently say the signal stalk isn’t missed at all. In fact, the turn signal buttons feel more intuitive, given how the Cybertruck handles.
That said, could Tesla offer signal stalks as an option for those who prefer them? It’s not out of the question. We’ll keep you updated, but in the meantime, let us know—do you prefer turn signal buttons or a traditional stalk?
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