Elon Musk has spent years warning about artificial intelligence. Now his xAI unit supplies the raw power that makes rival models smarter.
In a deal announced Tuesday, SpaceXAI agreed to give Anthropic access to Colossus 1. The Memphis supercluster packs more than 220,000 Nvidia GPUs. It includes H100s, H200s and fresh GB200 accelerators. Capacity exceeds 300 megawatts. New resources come online within weeks.
Anthropic will tap the cluster to expand service for Claude Pro and Claude Max users. The arrangement marks a sharp turn. xAI no longer simply consumes compute. It sells it. The shift positions the young company as an unexpected cloud contender.
Just weeks earlier xAI struck a similar pact with Cursor. The $29 billion coding startup will train its Composer 2.5 model on tens of thousands of xAI GPUs. Sources told Business Insider the setup lets xAI generate revenue from its massive infrastructure while it continues building Grok.
These deals arrive as xAI scales at a pace few match. Colossus 1 went from concept to operation in 122 days. Colossus 2 already brings another 550,000 GB200 and GB300 units online. Total deployed GPUs sit near 230,000 with hundreds of thousands more planned. Musk has spoken of reaching one million GPUs and even a gigawatt-scale training cluster.
Power remains the binding constraint. Memphis officials approved only 150 megawatts from the grid despite xAI’s request for 300. The company turned to portable methane-gas generators. Local leaders raised pollution concerns. Yet construction presses forward. xAI bought a third building late last year to push total training capacity toward two gigawatts. It nicknamed the site “MACROHARDRR.”
But Musk looks beyond Earth. The Anthropic announcement carries a striking addendum. The companies expressed interest in partnering on multiple gigawatts of orbital AI compute. The statement pulls no punches.
“The compute required to train and operate the next generation of these systems is outpacing what terrestrial power, land, and cooling can deliver on the timelines that matter.” So reads the joint release from x.ai. It continues: “SpaceX is the only organization with the launch cadence, mass-to-orbit economics, and constellation operations experience to make orbital compute a near-term engineering program rather than a research concept. If engineering challenges can be overcome, space-based compute offers near-limitless sustainable power with less impact on Earth.”
That vision echoes earlier comments from Musk. After SpaceX acquired xAI earlier this year he spoke of launching satellites that each deliver 100 kilowatts of compute per ton. Annual additions could reach 100 gigawatts. Within two to three years he believes space will deliver the lowest-cost AI compute. Reuters explored the merger and its orbital ambitions in February.
Such talk once sounded like science fiction. Today it anchors real contracts. Anthropic, a direct competitor to xAI in frontier models, now relies on Musk’s hardware. The move supplies Anthropic with capacity it cannot quickly build itself. It also gives xAI cash to offset the billions pouring into data centers.
Traditional cloud giants watch closely. Amazon, Microsoft and Google dominate enterprise AI infrastructure. Yet none match the single-minded speed of xAI’s build-out. CoreWeave and Lambda offer specialized GPU clouds but lack xAI’s vertical integration with rockets and satellites.
Revenue potential looks clear. Renting excess GPUs during training lulls turns fixed costs into recurring income. Early deals with Cursor and now Anthropic test the model. Success could accelerate expansion. Failure would expose the financial weight of building at this scale.
Environmental and regulatory questions linger. Memphis residents protested gas turbines. Power grids strain under AI demand nationwide. Orbital data centers, if realized, promise relief yet introduce new risks: radiation, orbital debris, signal latency. Engineers must still solve cooling, maintenance and data transmission from space.
None of that slows Musk. He merges companies, buys buildings and inks deals with former rivals. The pattern repeats across his portfolio. Tesla supplies batteries to competitors. SpaceX launches satellites for governments that also compete with Starlink. Now xAI rents compute to the very labs racing to surpass Grok.
Industry watchers note the asymmetry. Most AI startups beg for GPUs. xAI builds its own clusters faster than peers can lease them. Jensen Huang once praised the feat. “Never been done before – xAI did in 19 days what everyone else needs one year to accomplish,” the Nvidia chief said. “That is superhuman.”
Whether superhuman speed translates into sustainable cloud profits remains unproven. But the infrastructure exists today. The contracts are signed. And the next chapter, quite literally, may unfold above the clouds.
Recent coverage from CNBC and Forbes underscores how quickly the story evolves. Both outlets reported the Anthropic pact hours after announcement, highlighting the 300-plus megawatts and orbital interest. Axios quoted Anthropic’s head of product calling it a direct expansion of capacity.
The Information first framed xAI’s cloud pivot in its briefing. Later reporting from the same publication tracked the Memphis build and third-site purchase. Those accounts provide essential context on costs and power hurdles.
xAI still frames its mission as understanding the universe. Yet its machines now train models at rival firms. The compute arms race has a new supplier. And its founder shows no sign of slowing down.
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