OpenAI pauses UK build

OpenAI has put its Stargate UK project on hold less than seven months after unveiling it on September 16, 2025, saying the UK’s energy costs and regulatory environment do not yet support the kind of long-term investment a giant artificial intelligence data centre needs. Stargate UK was supposed to be the British arm of OpenAI’s infrastructure push with Nvidia and Nscale, built to keep OpenAI models running on computers physically located inside the United Kingdom for finance, public services, research, and national security work. The original plan was not small. OpenAI said it would explore taking up to 8,000 graphics processing units in the first quarter of 2026 and could scale that to 31,000 over time, with sites including Cobalt Park in northeast England. A data centre is basically a warehouse full of specialized computers, and an artificial intelligence data centre is a warehouse tuned for training and running models that burn through far more electricity than ordinary office software. The UK Parliament’s research service says these facilities now underpin almost all digital activity and that the country had about 1.6 gigawatts of data-centre capacity in 2024. That is why electricity is not a side issue here. The Social Market Foundation said in February 2025 that powering a hypothetical 100 megawatt data centre in Britain would cost about four times as much as in the United States, and it also pointed to planning restrictions and slow grid connections. The UK government has been trying to solve exactly this problem. In its January 13, 2025 artificial intelligence action plan response, it said it would create Artificial Intelligence Growth Zones with better access to power and faster planning support to speed up infrastructure buildouts. OpenAI’s pause lands awkwardly because Stargate UK was presented as part of that same national push. When OpenAI announced the project, it said it would help deliver the UK’s action plan and followed a July 2025 memorandum of understanding with the government on infrastructure priorities. The deeper shift is that the limiting factor for artificial intelligence is no longer just chips. A company can line up Nvidia hardware, capital, and political support, and still get stuck if the local power bill is too high or the permits and grid hookups take too long. Britain is not short on ambition. The government’s plan says the country is the world’s third-largest artificial intelligence market, and Parliament’s briefing says data centres were added to critical national infrastructure in September 2024. But a strategic label does not lower a power bill, and a memorandum does not connect a site to the grid. Until Britain can offer cheaper electricity, faster approvals, or both, the biggest artificial intelligence builders can keep treating the country as promising on paper and expensive in practice.