SpaceX's Ex-xAI Unit Hits $7.56B Q3 Revenue, Mostly From Renting Compute

SpaceX's AI business, which until this year was the independent lab xAI, booked $7.56 billion of revenue in the third quarter of 2026, up from $813 million a year earlier, according to the earnings release SpaceX filed with the SEC on 20 October 2026. The segment, now called Super Intelligence (SI), swung to a $431 million operating profit after losing $1.26 billion in the second quarter. Most of the growth did not come from Grok subscriptions. It came from "the activation of new cloud services agreements", the release says, plus the August acquisition of Cursor. One of the most heavily funded frontier labs has, in effect, become a compute landlord that also trains models, and its tenants include rivals.

What happened

SpaceX acquired xAI in February 2026 and listed on Nasdaq on 12 June in what NPR called the largest IPO ever. Its third-quarter results, released 20 October with a 10-Q filed on 22 October, were the first in which the AI segment carried the company. Group revenue was $14.58 billion, up 161%, and SI was 52% of it, ahead of Starlink-driven Connectivity at $5.25 billion.

The release breaks SI revenue into two lines: $538 million of advertising (the X platform) and $7.02 billion of "SI solutions and infrastructure", up from $359 million a year earlier. Cursor, which SpaceX completed buying on 14 August at an implied equity value of $60 billion, contributed $608 million of revenue between closing and 30 September. That leaves the bulk of the jump to cloud services contracts and Grok.

The biggest of those contracts is visible from the other side. Anthropic's amended S-1 of 2 November says that between May and October 2026 it agreed to spend up to $120.5 billion with SpaceXAI for Nvidia-powered compute over terms extending into 2029, about $3.1 billion a month once all capacity is delivered, which Anthropic expects in December 2026. CNBC's earnings coverage names Anthropic, Google and Reflection AI as cloud customers; Fortune lists Anthropic, Google, Grok and X as users of the segment's capacity.

The numbers

Why it matters

Labs are now buying compute from each other. A year ago xAI was a customer of the same GPU supply chain as everyone else. In Q3 2026 its solutions and infrastructure line reached $7.02 billion, and Anthropic, which competes with Grok, is among the named customers. SpaceX does not break out revenue by customer. The business model looks less like OpenAI and more like the neoclouds I wrote about in GPU Clouds in 2026: take on debt and capex, sign long take-or-pay contracts with model developers, and sell the remaining capacity to your own models.

The forward guidance amplified that reading. CNBC reports SpaceX guided to $33 billion to $37 billion of revenue for Q1 2027 against an analyst average of $22.2 billion, and quotes CFO Bret Johnsen citing "increased visibility into our compute contract pipeline over the next six months." The stock rose about 8% after hours.

What sceptics say

The profit is thin. The $431 million operating profit is after $1.2 billion of share-based compensation tied to Cursor, so the underlying number is better than it looks, but it is one quarter, and depreciation in the segment already rose from $922 million to $2.47 billion in a year as new capacity came online. Over nine months the SI segment still lost $3.3 billion at the operating line and spent $40 billion on capex. Capex was more than twice revenue in Q3.

Customer concentration is the second worry. If one lab is committed to roughly $3.1 billion a month, the segment's revenue depends heavily on a counterparty that is itself loss-making at the net level and preparing an IPO, as its S-1 shows. And the Memphis Colossus sites run partly on gas turbines that face a Clean Air Act lawsuit, which CNBC notes can proceed.

What it means for engineering and DevOps teams

My take, clearly opinion: when the company training Grok also hosts Claude, the line between model vendor and infrastructure vendor stops being useful. For buyers, three practical things follow.

Ask your model provider where inference actually runs. Data residency, subprocessor lists and outage blast radius depend on it, and the answer may now include a competitor's data centre.

Expect capacity to arrive in big, contract-shaped steps. 1.7 GW of nameplate compute is a lot, but it was built to serve multi-year deals. Spot or on-demand availability for smaller customers is a by-product, not the plan.

Treat developer tools as part of the platform war. Cursor now reports inside SpaceX's AI segment. If your team standardised on it, the vendor's incentives just changed; the market context is in Coding Agents in 2026.

FAQ

Is xAI still a company?

Not separately. SpaceX acquired xAI in February 2026; the entity is now SpaceX.AI LLC, which Anthropic's S-1 describes as formerly X.AI LLC, and its results are reported as SpaceX's Super Intelligence segment.

How much revenue does xAI make?

SpaceX's Super Intelligence segment, which includes the former xAI, X advertising and Cursor, reported $7.56 billion of revenue in Q3 2026 and $10.94 billion in the first nine months.

Does Anthropic use xAI compute?

Yes. Anthropic's S-1/A discloses agreements to spend up to $120.5 billion with SpaceXAI on Nvidia-powered compute through 2029.

Related: GPU Clouds in 2026: H100s at $2.59 an Hour, $104B of CoreWeave Backlog on $35B of Debt, and a Six-Year Bet on Silicon, AI Power in 2026: 485 TWh, a 0.3 GW Stargate, a 116 GW Turbine Backlog, and 1,800 MW That Dropped Off the Grid in Seconds and Coding Agents in 2026: Cursor at $2B Then Sold to SpaceX, Cognition at $1B, 58% on Terminal-Bench, and the Only RCT Still Says Slower.