- xAI merged with SpaceX in February 2026 in a $250 billion all-stock deal, creating a combined entity valued at $1.25 trillion.
- Elon Musk co-founded OpenAI in 2015, left the board in 2018, then sued the company and Sam Altman for abandoning its nonprofit mission.
- The Colossus supercomputer in Memphis, Tennessee, grew from 100,000 to over 200,000 Nvidia GPUs in under a year, with plans to reach 1 million.
- Musk raised over $32 billion for xAI between 2024 and 2026, making it one of the fastest-capitalized AI startups in history.
A $250 Billion AI Company Merged Into a Trillion-Dollar Empire
In February 2026, SpaceX officially acquired xAI in the largest merger of all time. The deal valued xAI at $250 billion and SpaceX at $1 trillion, creating a combined entity worth $1.25 trillion. Musk called it “the most ambitious, vertically-integrated innovation engine on and off Earth.”
Less than three years earlier, xAI did not exist. The company that Elon Musk founded in July 2023 to challenge OpenAI had gone from zero to a quarter-trillion-dollar valuation at a pace that makes even Silicon Valley veterans uneasy. But to understand how Musk built the world’s most aggressively capitalized AI startup, you have to go back to Pretoria, South Africa, where a bookish kid with an eidetic memory was already thinking about the future of intelligence.
A Kid From Pretoria Who Read the Encyclopedia at Age Nine
Elon Reeve Musk was born on June 28, 1971, in Pretoria, South Africa. By his own account, he was a voracious reader who consumed the entire Encyclopaedia Britannica as a child and taught himself programming on a Commodore VIC-20 at age 10. He sold his first software, a video game called Blastar, for $500 at age 12.
At 17, Musk left South Africa for Queen’s University in Ontario, Canada, before transferring to the University of Pennsylvania, where he earned degrees in economics and physics. He enrolled at Stanford for a PhD in energy physics in 1995 but dropped out after two days to launch Zip2, a city guide software company, with his brother Kimbal.
Zip2, PayPal, and the Pattern of Building at Impossible Speed
Compaq acquired Zip2 in 1999 for $307 million. Musk used his $22 million share to co-found X.com, an online bank that merged with Confinity to become PayPal. eBay bought PayPal in 2002 for $1.5 billion, giving Musk $165 million.
He poured nearly all of it into SpaceX and Tesla, two companies that nearly bankrupted him simultaneously in 2008. The pattern that would define xAI was already visible: move fast, spend aggressively, build infrastructure that competitors call insane, and iterate in public. The speed was the strategy.
Co-founding OpenAI, Then Watching It Become Everything He Feared
In 2015, Musk co-founded OpenAI alongside Sam Altman as a nonprofit research lab dedicated to developing artificial intelligence for the benefit of humanity. Musk contributed roughly $38 million in the early years. By 2017, he was privately arguing that OpenAI needed billions more in compute and should consider a for-profit model. He also proposed merging OpenAI into Tesla, giving him direct control. The board rejected it.
Musk left OpenAI’s board in 2018. Then came the transformation he had warned about: OpenAI restructured into a capped-profit entity, took $13 billion from Microsoft, and launched ChatGPT. In February 2024, Musk sued OpenAI and Altman for breach of contract, alleging they had abandoned the founding mission. The trial is scheduled for April 2026.
”OpenAI was created as an open-source nonprofit. Now it is a closed-source, maximum-profit company effectively controlled by Microsoft. If this isn’t a betrayal, the word has no meaning.”
July 2023: xAI Is Born With a Single Mission
Musk founded xAI on July 12, 2023, with a team of 11 co-founders recruited from Google DeepMind, Microsoft Research, and Tesla. The stated mission: build a “maximally truth-seeking AI” that prioritizes understanding the universe over political correctness.
”Truth and beauty and curiosity. I think those are the three most important things for AI.”
Grok, xAI’s flagship chatbot, launched in November 2023 on the X platform (formerly Twitter). It was deliberately positioned as the anti-ChatGPT: unfiltered, irreverent, willing to tackle questions that competitors refused to answer. Within months, Grok was integrated across X’s 500 million users, giving xAI a distribution advantage that Anthropic and OpenAI could not replicate.
Colossus, $32 Billion in Funding, and the Fastest AI Scaling in History
In September 2024, xAI brought Colossus online in Memphis, Tennessee. Built inside a former Electrolux factory in just 122 days, the supercomputer launched with 100,000 Nvidia H100 GPUs, making it the largest AI training cluster in the world. Three months later, it hit 200,000 GPUs. The target is 1 million.
The funding came in torrents. xAI raised $6 billion in its Series B in May 2024, another $6 billion in its Series C in December 2024 from investors including Andreessen Horowitz, BlackRock, Sequoia, Nvidia, and AMD, and a staggering $20 billion in its Series E in January 2026. Total funding: over $32 billion. The valuation leapt from $24 billion in mid-2024 to $250 billion at the SpaceX merger, a tenfold increase in 18 months.
Rebuilding From the Foundations Up
The SpaceX-xAI merger was supposed to be a coronation. Instead, it exposed fractures. Within six weeks of the deal closing, nine of xAI’s eleven original co-founders had left the company. Two departed after Musk complained that xAI’s coding tools were not competing effectively with Anthropic’s Claude Code or OpenAI’s Codex.
”xAI was not built right first time around, so is being rebuilt from the foundations up.”
Musk is not retreating. xAI is hiring Wall Street bankers at $100 an hour to teach Grok financial reasoning. A joint Tesla-xAI project called “Digital Optimus” aims to build AI agents that automate complex office workflows. And the lawsuit against OpenAI heads to trial in April, with damages theories reaching $135 billion. Whether Musk’s AI bet produces the truth-seeking superintelligence he promises or collapses under its own contradictions, the scale is already unprecedented. No one in history has spent this much, this fast, to build an artificial mind.
