Kai Musk is the son of Elon Musk and Canadian writer Justine Musk. He was born in January 2006 with his triplet brothers, Saxon and Damian, and turned 20 in 2026. He grew up close to SpaceX and attended Ad Astra, the small school his father helped start. As a teen, he also helped run AngelHacks, a student tech event. Unlike his famous father, he has kept most of his own life out of the spotlight.
In this article, you’ll learn about Kai Musk’s family, childhood, triplet brothers, school years, student tech work, SpaceX ties, college questions, and life in 2026.
Who Is Kai Musk?
Kai Musk is one of the children from Elon Musk’s marriage to Justine Musk. His older full siblings are Griffin Musk and Vivian Jenna Wilson. Saxon and Damian Musk are his triplet brothers.
The family had already faced a deep loss before the twins and triplets were born. Elon and Justine’s first son, Nevada Alexander Musk, died at 10 weeks old in 2002.
Justine later wrote about that period in a first-person essay for Marie Claire. She said she went to an IVF clinic after Nevada’s death. She later gave birth to twins and then triplets.
Griffin and Vivian were born in 2004. Kai, Saxon, and Damian followed in January 2006. The three boys were born through IVF.
Elon and Justine divorced in 2008, when the triplets were still very young. After the split, the five surviving children spent time with both parents.
Kai became known because of his family name, but he did not grow up as a child star. He rarely appeared in interviews. He did not build a public social media image. That quiet pattern has continued into adulthood.
Life as One of the Musk Triplets
Being a triplet shaped the first part of Kai’s life. He shared a home, school years, and many family moments with Saxon and Damian.
The three boys did not grow into one public identity. Walter Isaacson’s 2023 book about Elon Musk describes different interests among the brothers.
Kai appears as the more hands-on problem solver. He showed interest in the tech side of his father’s work and sometimes joined him at rocket launches.
That fits the rest of his early story. His school centered on real projects. His student work later included a tech event. He also spent time close to SpaceX as the company reached major goals.
Ad Astra Made School Very Different
Kai’s school life was far from normal.
In 2014, Elon Musk took his five older children out of a private school in Los Angeles. He hired one of their teachers and helped start Ad Astra on the SpaceX campus in Hawthorne, California.
Ars Technica reported that the school began with only a small group. Five of the first students were Musk’s children. It later grew, but it stayed small.
Ad Astra did not follow a normal grade system. Children of different ages worked side by side. The school put a lot of focus on science, math, engineering, coding, ethics, and project work.
Students studied real problems. They held debates. They built websites. They learned code. They made things with their hands. Formal tests and letter grades were not the center of the school day.
Kai was about eight when Ad Astra opened. Much of his childhood education took place in that setting.
The location mattered too. The school sat on the SpaceX campus. Engineers and rocket work were close by. For Kai, science was not only a subject in a book. It was part of the world around him.
AngelHacks Gave Him Work of His Own
AngelHacks gives a rare look at Kai doing something under his own name.
The 2020 AngelHacks event site lists him as an executive director and co-founder. Damian held the same roles. Claire Wang was listed as the founder.
AngelHacks was run mainly by students from the Ad Astra Hack Club and Andover Hack Club. It was open to students in grades 6 through 12.
The event welcomed beginners as well as experienced coders. Students could make an app, website, game, piece of hardware, video, art project, or other creative work. Mentors helped teams turn ideas into finished projects.
A linked project called Halo also began during the COVID-19 pandemic. Halo worked to move masks and other medical gear to hospitals and groups that needed them. Kai, Damian, and Claire Wang were named as donation team leaders.
This part of his teen years stands out because it belongs to him. He was not simply attending a family event. He was helping run a student project.
The work also matched the style of Ad Astra. Build something useful. Solve a real problem. Work with other people.
A Front-Row View of SpaceX
Kai also grew up with rare access to SpaceX.
Walter Isaacson describes him as interested in the technical side of his father’s work. He sometimes joined Elon at rocket launches.
One of the biggest moments came in May 2020, when Kai was 14.
He sat beside his father in the control room at Cape Canaveral as SpaceX prepared its first crewed flight to orbit. The Falcon 9 rocket carried NASA astronauts Bob Behnken and Doug Hurley in the Crew Dragon spacecraft.
The mission, Demo-2, launched on May 30, 2020. NASA described it as the first launch of astronauts on Crew Dragon and Falcon 9 to the International Space Station. It also marked the return of astronaut launches from U.S. soil after the Space Shuttle program ended in 2011.
For a teenager who had spent years in a school built around science and hands-on work, that was a remarkable place to be.
The moment does not tell us what career he will choose. It does show how close he was to real engineering work during his teens.
The 2015 Meeting With Narendra Modi
Kai appeared in another public moment while he was still a child.
In September 2015, Indian Prime Minister Narendra Modi visited Tesla in California. Elon Musk was photographed with two of his sons during the visit.
The photo returned to social media in 2024. Elon identified the boys as Damian and Kai.
It is a small moment, but it gives a clear picture of the world around Kai as a child. Business leaders, world figures, rockets, and major tech companies were part of his father’s work.
Even with that access, Kai did not become a regular public figure.
His Place in the Musk Family
Kai grew up with four surviving full siblings from Elon and Justine’s marriage: Griffin, Vivian, Saxon, and Damian.
He also has younger half-siblings through his father’s later relationships.
That wider family has grown over time, which is why older profiles often list fewer Musk children than newer ones.
For Kai, the main early family story still centers on the five children Elon and Justine raised after Nevada’s death.
College and the CMU Question
As Kai entered his twenties, more attention moved to college.
Carnegie Mellon University is often linked with his name online. The Pittsburgh school is known for computer science, robotics, and engineering.
Kai has not announced a college, major, class year, or campus role.
His earlier education is much easier to trace. Ad Astra was a major part of his childhood, and AngelHacks gives a clear look at his teen interests.
His next school step has stayed private.
Career and Work in 2026
Kai has not announced a full-time public job in 2026.
He has not introduced a startup or a company of his own. He has also not announced a role at Tesla, SpaceX, xAI, Neuralink, or another business tied to his father.
AngelHacks remains one of the clearest examples of work he helped lead himself. It shows an early interest in tech, teamwork, and building useful projects.
At 20, his adult career is still at an early stage. His next step may stay private until he chooses to share it.
Money and Personal Life
Kai has not announced a personal net worth.
His father’s wealth should not be treated as Kai’s own money. The same applies to the exact net worth figures often attached to his name online.
His exact height and weight are also not part of his public profile.
His dating life remains private. He has not announced a marriage, engagement, or public relationship.
He also does not keep a widely known public social media account that offers a regular look at his daily life.
For someone born into one of the best-known families in tech, he has kept a very low profile.
Kai Musk in 2026
Kai turned 20 in 2026 and is still far less public than his father.
The clearest parts of his story fit together well. He was born as one of three triplets. He grew up with four surviving full siblings. He attended Ad Astra at SpaceX. He helped lead AngelHacks and the Halo aid project. He joined his father at rocket launches and was in the control room for SpaceX’s Demo-2 mission in May 2020.
Those years put science and tech close to his life, but they do not define his future.
His college choice, career plans, finances, and relationships remain private.
That leaves Kai in an unusual place. His family name is known around the world, while his own day-to-day life is still mostly his own.
A Quiet Path Inside a Very Public Family
Kai grew up near some of the biggest tech and space projects in the United States, but he has not tried to turn that access into fame.
His public trail is small but clear. It runs through Ad Astra, AngelHacks, SpaceX launches, a student aid project, and a few family events.
At 20, he still has time to choose his own path without sharing each step with the public.
For another Tozy profile about a child of famous parents who grew up mostly outside the spotlight, read our story on Kian William Jarrahy, Geena Davis’s private twin son.
