OpenAI has paused Stargate UK, its planned data center project built in partnership with NVIDIA, citing high energy costs and unresolved regulatory questions. The project was announced in September 2024 and would have given the UK government domestic access to advanced AI models for use cases where data jurisdiction matters, particularly in defense, healthcare, and public sector applications.
In a statement to Bloomberg, OpenAI said it intends to “move forward when the right conditions such as regulation and the cost of energy enable long-term infrastructure investment.” The company added that it views AI compute as foundational to the UK’s AI ambitions, but stopped short of giving a timeline for resumption.
The original plan
The project formed part of OpenAI’s push to help individual countries build what it calls sovereign AI computing capacity: domestically hosted infrastructure that keeps sensitive workloads inside national borders. For the UK government, that meant running OpenAI models locally rather than routing data through US-based data centers.
The NVIDIA partnership was central to the plan. Building a GPU cluster at the scale required for frontier AI models demands significant hardware, and energy consumption follows directly from that. Data centers of this type typically draw tens or hundreds of megawatts, a meaningful challenge in a country where industrial electricity prices rank among the highest in Europe.
Energy costs and regulation as blockers
The UK’s energy pricing has been a persistent friction point for large-scale compute investment. Unlike some European markets, the UK does not have access to abundant cheap hydropower or nuclear baseload at the prices seen in, for example, the Nordic countries or France. That cost structure can make decade-long infrastructure commitments difficult to model financially.
Regulatory uncertainty adds another layer. The UK is still working through its approach to AI governance, and OpenAI appears unwilling to commit capital to permanent infrastructure before that framework solidifies. The company has not specified which regulatory questions remain open, but licensing conditions for large data centers, planning permission timelines, and data handling rules are all in active development in British policy circles.
OpenAI for Countries continues elsewhere
The pause does not reflect a pullback from sovereign AI deals broadly. OpenAI runs a separate program called OpenAI for Countries that offers comparable arrangements to other governments. Countries currently in that program include Australia, Greece, the UAE, Slovakia, and Kazakhstan, among others.
The original Stargate announcement in September 2024 positioned the UK deal as a flagship example of how OpenAI planned to extend its infrastructure beyond the United States. A pause this early in the build-out phase signals how difficult the cost math remains for sovereign AI projects in markets with expensive power grids and unsettled regulatory conditions.
Whether the OpenAI for Countries program faces similar pressures in other markets remains unclear. For the UK, the infrastructure investment stays on hold until the energy economics and the regulatory environment shift in OpenAI’s favor.