SpaceX Turns Colossus Into a Compute Landlord With $6.3B Reflection AI Deal

SpaceX has signed a compute lease with Reflection AI worth up to $6.3 billion, adding a fourth paying tenant to the Colossus campus in Memphis, Tennessee, and cementing the facility's shift from internal AI training cluster to third-party infrastructure platform.

According to CNBC, which reviewed the contract materials, Reflection will pay $150 million per month starting July 1, 2026, for access to Nvidia GB300 chips at Colossus 2, the newer of SpaceX's two Memphis buildings. The deal runs through the end of 2029, though either side can exit with 90 days' notice after the first three months, a clause that sets a minimum commitment of roughly $450 million but leaves the full $6.3 billion figure contingent on both parties staying in.

The Colossus complex was built by xAI, Elon Musk's AI company, which merged with SpaceX earlier this year. As TechCrunch reported, as xAI's internal AI pursuits faltered, SpaceX began monetizing its chip holdings by renting capacity to outside labs. That pivot has been rapid. Anthropic signed on in May 2026 to lease all of Colossus 1 at approximately $1.25 billion per month, and Google followed in early June at $920 million per month. Reflection, at $150 million per month, is the smallest of the three named tenants by a wide margin, but it's notable for a different reason: the company has not yet released a public frontier model.

Reflection was co-founded by Misha Laskin, who led reward modeling for DeepMind's Gemini project, and Ioannis Antonoglou, a co-creator of AlphaGo. According to Forbes, the company's valuation has moved from $545 million to roughly $25 billion in under two years, with an $800 million investment from Nvidia anchoring its last round. That last detail is worth pausing on. As Axios noted, Nvidia invested $800 million in Reflection, and Reflection will now run on Nvidia hardware that SpaceX purchased, making the chipmaker simultaneously a backer of the startup and an indirect supplier to it through a landlord's balance sheet. That loop isn't unique to this deal; it's the standard capital structure of the current AI infrastructure buildout, where the same handful of players keep appearing in each other's cap tables, customer lists, and supply chains.

The architecture question here isn't complicated. Reflection is leasing GB300 capacity rather than building its own data center, which converts a multi-billion-dollar capital expenditure into a monthly operating cost. That tradeoff buys flexibility and speed, but it also means the company is paying at commercial rack rates for chips its backer helped design and sell. The 90-day exit clause is real optionality, but only if you have somewhere else to send the workload. Right now, the GB300 supply outside of Colossus and the major hyperscalers is limited.

For SpaceX, the numbers are straightforward. According to Tech Funding News, committed compute revenue from outside clients now exceeds $80 billion through 2029. The infrastructure houses approximately 555,000 Nvidia GPUs acquired at a cost of around $18 billion. If even a fraction of those leases run their full term, the return on that hardware investment is substantial. The company is also reportedly in the process of acquiring Cursor, the AI coding platform, which would extend its presence up the stack from raw compute into developer tooling.

What hasn't been answered yet is whether Reflection ships anything. The company has government ties, including work with the Department of Energy's Genesis Mission and Pentagon AI programs, according to Yahoo Finance. Its pitch is that it's building an American, open-weight alternative to closed frontier labs, a framing that gained political salience after the Trump administration's restrictions on Anthropic's most capable models earlier this year. That's a real market position, but it requires an actual model. A $25 billion valuation and a $150 million monthly compute bill without a public product is a high-pressure situation, and the first 90-day exit window will be one of the more closely watched technical and financial signals of Q3.

Sources cited:
- CNBC (https://www.cnbc.com/2026/06/22/spacex-ai-colossus-data-center-reflection.html)
- TechCrunch (https://techcrunch.com/2026/06/22/spacex-inks-compute-deal-with-reflection-ai-an-open-source-ai-lab/)
- Tech Funding News (https://techfundingnews.com/spacex-lands-6-3b-compute-deal-with-open-source-ai-startup-reflection-and-nvidia-is-on-both-sides-of-the-trade/)
- Axios (https://www.axios.com/2026/06/22/open-source-ai-gets-more-compute-from-spacex)
- Forbes (https://www.forbes.com/sites/jonmarkman/2026/06/24/spacexs-colossus-lands-63-billion-compute-deal-with-reflection-ai/)
- Yahoo Finance (https://finance.yahoo.com/technology/ai/articles/spacex-signs-6-3-billion-160024302.html)
- Data Center Dynamics (https://www.datacenterdynamics.com/en/news/spacex-secures-63bn-compute-capacity-deal-from-ai-startup-reflection/)