3-Line TL;DR
- My read: Tesla builds the bodies, SpaceX supplies the ride, the network and the AI, and together they point at settling the Moon and Mars (author's view)
- Robots first is Musk's own plan: in 2025 he said the first Mars Starship would carry Optimus, but the 2026 window has slipped and the Moon now comes first
- The side businesses already pay: SpaceX made $14.58B in Q3 2026, mostly from AI and Starlink, and I'm off to buy SpaceX stock (author's opinion, not advice)
Tesla builds the body, SpaceX brings the ride and the brain
- The way I see it, Tesla's hardware and SpaceX's software meet, and the end goal is opening up space (author's view)
- Tesla's part is the body: Optimus, batteries and the factories that make them
- Tesla says Fremont started making its first production-quality Optimus robots this quarter, but it gave no unit count (Tesla Q3 2026 update)
- The Fremont line is designed for 1 million robots a year, and a Texas line for 10 million in the long run (Tesla Q1 2026 update)
- Those are design capacities, not robots built
- SpaceX's part is the ride and the network: Starship and Starlink
- Since February it also owns xAI, so Grok and the Colossus supercomputers sit inside SpaceX too (xAI)
- One correction to my own split: Optimus runs Tesla's own AI, and Tesla is building 400 MW of training compute for it by the end of 2026 (Tesla Q3 2026 update)
Made by HSL — Tesla 10-Q, Tesla Q1 update, SpaceX prospectus
- The two already trade with each other
- Tesla sold SpaceX $626M of Megapack batteries from January to September 2026 (Tesla 10-Q)
- Tesla's $2B xAI investment became SpaceX stock in March, under 1% of the company
- Grok already rides in Tesla cars as a voice assistant, and both plan the Terafab chip plant for Optimus and orbital chips
- Tesla also set up a committee to explore deeper ties with SpaceX, a merger included, with no promise anything happens
- I covered the Terafab and orbital data center plans in the Grok 5 and Colossus post
Body from one company, brain and ride from the other
Why send Optimus first?
- People need air, food and a way home, so sending them first to dig and build has hard limits
- Robots can do the work first, and people follow once the place is ready (author's view)
- Musk said much the same in May 2025: the first Mars Starship would carry Optimus, and people would come on the second or third landing (Reuters via Investing.com)
- He gave a late-2026 departure only 50–50 odds, with orbital refueling still to be solved
- In February 2026 he moved the priority to a city on the Moon, which he said could take under 10 years (Reuters via Investing.com)
- Mars launch windows come every 26 months, while the Moon is a few days away at any time
- On the August earnings call he talked about robots helping run Moon factories; the reporter assumed he meant Optimus (Space.com)
Made by HSL — Reuters, Space.com, NASA
- Starship did reach orbit in September and delivered 26 Starlink satellites, its first paying mission (SpaceX Q3 release)
- Moving fuel between ships in orbit, which Mars needs, hasn't been shown yet
- Space.com's October 14 assessment is that the 2026 Mars window is off the table, and the next good one is late 2028 (Space.com)
- NASA also reset the Moon plan on October 23
Source: NASA — captured excerpt, box added by HSL
- Artemis III in 2027 is now a docking test in Earth orbit, and crewed landings are targeted for 2028
- SpaceX and Blue Origin each have to fly an uncrewed demo landing first
Moon tourism like in Cyberpunk: Edgerunners?
- Once the groundwork is done, people move to the Moon or Mars (author's view)
- Then the Moon trips and Moon living from Cyberpunk: Edgerunners stop being anime only (author's view)
- Lucy wanted the Moon, and the current NASA plan takes two astronauts down per mission, so the waiting list is long
- Musk's own sales pitch for the xAI deal goes further: AI satellites in orbit, then factories on the Moon, paying for Moon bases and a Mars civilization (statement via Shacknews)
- SpaceX's own prospectus is more careful: Moon and Mars transport and orbital computing are unproven and may never pay off (SpaceX prospectus, p.44)
- The founder sells the city; the legal filing lists everything that can go wrong
The side businesses already pay the bills
- The products built along the way are how this pays for itself (author's view)
- That part isn't a forecast anymore
Made by HSL — SpaceX Q3 2026 release, company-reported
- Rockets, the part that goes to Mars, made the least: $1.77B of $14.58B
- Starlink grew to 13.6 million consumer lines, up from 7.2 million a year earlier, and earned $2.37B of operating profit in the quarter
- The AI business (Grok, X and renting out compute) brought in $7.56B
- SpaceX listed on Nasdaq as SPCX on June 12 at $135 a share (SpaceX)
- Honestly, isn't this huge? I'm off to buy SpaceX stock (author's opinion, not investment advice)
| Milestone to watch | Why it matters |
|---|---|
| Ship-to-ship refueling in orbit | Without it, no Moon landing or Mars trip |
| Starship uncrewed Moon landing demo | NASA requires it before the 2028 crew landing |
| Optimus unit counts in Tesla reports | Shows whether "production started" becomes real numbers |
| Late 2028 Mars window | First real chance for robots on Mars |
Community Reactions
- Simon_Drake in r/spacex thinks lunar-landing work could push Mars departures past 2028 to 2031 (no measurements) (Reddit)
- Sigmatics in r/spacex doubts the schedule but expects advanced humanoids to help Mars exploration a lot (no measurements) (Reddit)
- erclark99 in r/teslamotors wants Tesla to keep focusing on the Model 3, Model Y and clean transport instead of robots (Reddit)
- potatosquire in r/stocks believes in AI progress but sees debt and competition as risks to these companies' profits (no measurements) (Reddit)
Q&A (Field Notes)
- Q. Are Tesla and SpaceX merging?
- Not decided. Tesla's Q3 filing says a committee is exploring deeper ties, a merger included, with no assurance of a deal
- Q. Will Optimus fly to Mars this year?
- Unlikely. Orbital refueling isn't proven yet, and Space.com puts the next realistic window in late 2028
- Q. Does Grok control Optimus?
- No source shows that. Optimus runs on Tesla's own AI, and Grok is confirmed only as an in-car assistant
- Q. Can I buy SpaceX shares?
- Yes, it trades on Nasdaq as SPCX since June 12, 2026. The $135 IPO price is not today's price
- Q. When can ordinary people visit the Moon?
- No date exists. NASA's 2028 plan lands two astronauts per mission, and Musk's Moon city is a goal, not a schedule