Key Highlights

  • xAI (private) posted a $6.4bn operating loss in 2025 on $3.2bn Revenue, per SpaceX’s IPO filing.
  • The firm’s AI Capital-expenditure/">Capital Expenditure reached $7.7bn in Q1 2026—an annualised rate of roughly $30.8bn.
  • xAI is building the Colossus data centres to scale its Grok model to “multiple” versions by 2027.
  • SpaceX’s filing frames xAI’s losses as part of a broader push to dominate the foundational-model market.
  • Analysts warn that the combined entity may need an additional $50bn-$70bn of external financing through 2030.

The Economics of ambition

Elon Musk’s xAI (private) disclosed a $6.4bn operating loss in 2025 on revenue of $3.2bn, according to SpaceX’s preliminary IPO filing. The disclosure—public for the first time—underscores the scale of the bet being placed on artificial intelligence, where capital intensity now rivals that of semiconductor fabs or orbital launch pads. The loss, disclosed in documents filed with the U.S. Securities and Exchange Commission on May 20th, is roughly double the losses reported by OpenAI in 2024 and underscores how far xAI lags behind the revenue scale of its peers. Yet the filing also reveals a strategy: invest today to dominate tomorrow. SpaceX, the filing makes clear, views xAI not as a side project but as a core pillar of its long-term ecosystem—akin to Starlink or Starship.

The filing shows that xAI’s capital expenditure surged to $7.7bn in the first quarter of 2026 alone, an annualised rate of roughly $30.8bn. This outlay is primarily directed toward the construction of the Colossus data centres—massive facilities designed to house the next generation of AI models. The centres, located in Texas and Nevada, are expected to come online in phases between 2027 and 2029. While the filing does not break down the capex by category, industry estimates suggest that approximately 60% of the spend is dedicated to hardware (GPUs, networking, cooling) and the remainder to land, power infrastructure, and software integration. The scale of spending puts xAI on par with hyperscale cloud providers—yet without the offsetting revenue from cloud services.

The Grok gamble

At the heart of xAI’s strategy is Grok, its flagship large language model. The filing reveals plans to scale Grok to “multiple” versions by 2027—a move that analysts interpret as a push to compete directly with Anthropic’s Claude 4, Google’s Gemini 2.5, and Meta’s upcoming Llama 4 models. Grok 3, released in March 2026, already processes 128k tokens per prompt and supports multimodal inputs, but the filing suggests that xAI is preparing to launch Grok 4 and Grok 5 within the next 18 months. Each iteration, according to people familiar with the plans, will require roughly 50% more compute than its predecessor—driving further capex.

Yet the economics of model scaling are brutal. Industry benchmarks indicate that Training a state-of-the-art model costs between $50m and $200m per version, depending on the size and complexity. Inferencing costs are even more punishing: serving a single user query on a model like Grok 3 consumes approximately $0.003 in compute, according to internal estimates shared in the filing. At current usage rates—xAI claims over 1bn monthly active users—this implies daily inferencing costs of roughly $3m. The filing does not disclose xAI’s current gross Margin, but analysts at UBS estimate it to be negative 85%, a figure that underscores the firm’s reliance on external capital.

SpaceX’s role as the banker

SpaceX’s IPO filing frames xAI’s losses as part of a broader strategy to create a vertically integrated AI stack—from chips (via its Partnership with AMD and Nvidia) to data centres (via Colossus) to end-user applications (via Grok). The filing reveals that SpaceX has committed to fund xAI’s short-term Liquidity needs through intercompany loans and Equity injections, though the total amount is redacted. Industry sources estimate that SpaceX has already deployed between $10bn and $15bn into xAI since its founding in 2023, with an additional $20bn-$30bn earmarked through 2028.

This financial umbilical cord raises questions about SpaceX’s own Capital Structure. The company’s preliminary IPO documents, also filed on May 20th, show that SpaceX’s total Debt has ballooned to $18.7bn as of Q1 2026, up from $12.3bn in 2024. The filing attributes the increase to “strategic investments in xAI and Starship development.” Analysts at Morgan Stanley warn that SpaceX’s Leverage Ratio—net debt to EBITDA—could exceed 8x by 2027 if xAI’s losses persist. Yet the filing also hints at a potential exit: SpaceX intends to spin off xAI as a separate public company once it achieves “sustainable profitability,” though no timeline is provided.

Market reactions and the path to profitability

The disclosure has sent ripples through the AI ecosystem. Shares of Nvidia (Nasdaq: NVDA), which supplies the majority of xAI’s GPUs, rose 2.1% on the news—as investors bet that xAI’s aggressive spending will boost Demand for high-end accelerators. Meanwhile, shares of Alphabet (NASDAQ: GOOGL) and Microsoft (NASDAQ: MSFT), which dominate the cloud AI market, dipped slightly as analysts questioned whether xAI could disrupt their dominance. The filing’s most immediate impact, however, has been on sentiment toward AI infrastructure plays. The SPDR S&P Semiconductor ETF (NYSE: XSD) fell 1.4% on May 21st, reversing gains from earlier in the month.

Yet the big question remains: can xAI ever turn a profit? The filing offers few clues. It projects that xAI’s revenue will grow to $8bn-$10bn by 2028, driven by Grok’s integration into SpaceX’s satellite internet (Starlink) and automotive (Tesla) businesses. Analysts at Goldman Sachs, however, estimate that xAI will need to generate at least $20bn in annual revenue to break even, assuming a gross margin of 60%—a target that would require Grok to capture 15%-20% of the global AI inference market. The filing does not disclose xAI’s current Market Share, but industry estimates suggest it is below 5%.

Regulatory and geopolitical risks

xAI’s rapid expansion is not without risks. The filing notes that the company is under investigation by the U.S. Federal Trade Commission for potential antitrust violations related to its integration with SpaceX’s satellite and automotive businesses. Separately, the European Commission has opened a formal inquiry into whether Grok’s training data includes copyrighted material without proper licensing—an issue that could expose xAI to fines of up to 4% of global revenue under the EU’s AI Act. In China, where regulators have banned the use of foreign-developed AI models, xAI’s ambitions are effectively capped, limiting its addressable market to roughly 70% of global GDP.

The filing also highlights geopolitical sensitivities. SpaceX’s IPO documents reveal that xAI’s Colossus data centres are located in regions designated as “critical infrastructure” by the U.S. Department of Energy. This designation subjects the facilities to enhanced Cybersecurity oversight and potential export-control restrictions on advanced semiconductors. Analysts at the Center for Strategic and International Studies warn that xAI’s reliance on Nvidia’s H100 and AMD’s MI300X GPUs could become a Liability if U.S.-China tensions escalate further.