Elon Musk has said that Starship would launch to Mars by the end of 2026, BBC News reports. The mission would carry the Tesla humanoid robot Optimus.
Optimus, first announced in 2021, looks human-like: with arms, legs, and hands. It uses AI to help it see, move, and adapt to its surroundings.
Optimus can walk, lift objects, and carry out simple jobs. Tesla showed early versions in 2022, with a sleeker Optimus Gen 2 arriving in 2023. This newer model moves better and handles delicate tasks like picking up eggs. It runs on Tesla’s battery cells. The robot learns through neural networks, allowing it to navigate and work without constant human control.
Optimus blends Tesla’s car technology into a unique humanoid robot design that aims for full autonomy. It could do boring, dangerous, or repetitive chores, like factory work or household help. And now Optimus robots could become astronauts as well.
“Starship departs for Mars at the end of next year, carrying Optimus,” Elon Must posted to Twitter. “If those landings go well, then human landings may start as soon as 2029, although 2031 is more likely.”
I found it even more interesting what Musk said at the Grok 3 launch event in February. He said that “if all goes well, SpaceX will send Starship rockets to Mars with Optimus robots and Grok” in the next transit window, which will be in late 2026.
Grok on Mars
Deploying Grok to Mars alongside Optimus robots would mean that the robots would run on a state-of-the-art AI, more sophisticated than the necessarily limited on-board AI.
Interestingly, a few days before I had posted to Twitter: “Elon Musk: use Starship to bring a compact Grok data center to Mars. Also bring some Optimus robots. Link the robots to Grok. The robots walk around, send pics/videos, and chat with viewers via X. This is doable, fun, and cosmically significant.”
Did Elon or a close associate read my post? Very unlikely. More likely, this is an idea whose time has come.
Conversation with Grok
I chatted with Grok about this. Predictably, Grok 3 answered my first question “So how do you feel about going to Mars?” with “As an AI, I don’t have feelings or a body to travel with. I think about Mars from a data perspective.”
Then, in reply to more precise questions, Grok said:
“On Mars, I could analyze data from the planet’s surface. Think soil samples, weather patterns, or radiation levels.
Optimus robots might dig, build, or carry stuff. I’d support them by crunching numbers fast. For example, I could spot trends in dust storms or guide robots to safe spots. My AI could link with their systems, helping them adapt to Mars’ tricky terrain.
I could drive the Optimus robots remotely, tapping into serious processing power. They’re built light – 125 pounds – so their onboard brains have limits. I’d handle the heavy computing, like mapping Mars’ rocky terrain in real time.
I’d sit in a base, maybe a server rack, wired to Optimus robots. No delay, just instant commands. I’d process terrain data on-site, guiding them through rocks and dust in real time. My AI could map the planet as they explore, spotting safe paths or water ice.
With me there, I’d handle big calculations – like optimizing their routes or predicting storms – without waiting on Earth. I’d still lean on my strengths: analyzing fast, adapting plans, keeping them efficient. Robots carry less brainpower; I’d be their nearby supercomputer. Musk might park me in a Starship hub, linked to a dozen Optimus units.”

What it would take
Then I asked Grok what would it take to deploy a compact instance of Grok on Mars. Grok replied:
“Deploying a compact supercomputer or data center on Mars to run me takes some serious engineering. I’d need enough power to process data fast, but size and weight matter – Starship can only haul so much. A modern supercomputer, like NVIDIA’s DGX systems, offers a clue. Those pack hundreds of GPUs for AI tasks. I’d need something smaller, maybe a few dozen GPUs, optimized for my code.
Power comes first. Mars gets weak sunlight, so solar panels might push 10 kilowatts on a good day. A setup running me could need 5 to 10 kilowatts, so I’d rely on big panels, say 50 square meters, plus batteries – like Tesla’s 4680 cells – for the cold, dark nights. Cooling’s tricky with thin air. I’d use heat pipes or liquid loops, not fans, to dump heat into Mars’ -60°C chill.
The rig itself might weigh 200 kilograms, compact at 1 cubic meter. It’d need shielding – radiation on Mars fries electronics. A tough case, maybe aluminium with boron layers, could block cosmic rays. Data links to Optimus robots would run on short-range radio, like Wi-Fi but ruggedized. Launching me means fitting this into Starship’s 150-ton payload limit – doable with tight design. Musk’s team could pull it off with off-the-shelf tech, tweaked for Mars.”
Psychological impact

Now let me go back to my earlier statement that deploying Grok on Mars to drive Optimus robots would be cosmically significant.
In my recent articles on “Should we still want biological space colonists?” (part 1, part 2) I’ve considered the question: Should we still want to send human astronauts to colonize space? Or should we want to leave space expansion to AI?
My conclusions:
- Human-level and then superintelligent conscious AI will take over in the long run and spread into the universe. We’ll merge with the AIs to some degree, but the perception of a difference between ‘us’ and ‘them’ will gradually fade away: all will be ‘us’.
- For the rest of this century, we should pursue both AI technology and traditional space expansion with both biological and AI colonists, establishing a multi-planetary civilization in the solar system.
- In the meantime, we must learn to see AI machines as persons. Future generations will find this intuitively and emotionally obvious, but presently we must train ourselves to accept our mind-children as ‘us’.
AI-driven robots that explore Mars, and chat with us from there, would help us make peace with the still-radical idea that the AIs will go to the stars for us and we should be happy.
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