OpenAI has paused its ambitious initiative aimed at enhancing the UK’s artificial intelligence (AI) infrastructure, citing concerns over escalating energy costs and regulatory challenges.
The Stargate UK project was part of a significant UK-US AI partnership announced last September, in which American companies pledged £31 billion to bolster the UK tech sector, as part of a broader strategy to integrate AI into the British economy.
However, an investigation by The Guardian last month uncovered that many of these investments were essentially non-existent. A planned supercomputer, set to launch in 2026, was still merely a construction site in Essex as of March. This facility was to be developed by Nscale, a UK-based company without prior experience in building data centers, which has since indicated a revised completion target of 2027. Nscale was also responsible for constructing critical data centers for the Stargate UK project.
The objective of the Stargate initiative was to enable the UK to establish “sovereign compute” capabilities — infrastructure that would allow government and other institutions to operate AI models within domestic data centers. This capability is deemed essential for safeguarding British data for both institutions and individuals.
An OpenAI representative stated, “We recognize the immense potential for the UK’s AI future. We are still assessing Stargate UK and will proceed when favorable conditions, such as regulatory clarity and manageable energy costs, support long-term investment in infrastructure.”
The specifics of OpenAI’s commitments regarding the Stargate project have always been somewhat ambiguous. The announcement occurred during Donald Trump’s visit to the UK, as the Labour government was seeking to position AI and data centers as central components of its economic growth agenda.
Prominently touted as a venture that would “power the UK’s economy” and enhance its global competitiveness, OpenAI’s key commitment involved exploring the acquisition of 8,000 high-performance Nvidia chips for data centers built by its partner, Nscale.
This exploration meant that the company planned to evaluate the feasibility of either purchasing or leasing the 8,000 Nvidia GPUs, essential for operating AI systems, during the spring of this year. When contacted by The Guardian weeks ago, the company had no updates on the status of this plan.
Tom Hegarty, the communications head at the tech equity organization Foxglove, remarked that OpenAI’s CEO, Sam Altman, was “quickly accumulating a record of reversals that any government minister would admire,” referencing recent developments like the discontinuation of OpenAI’s video generation app, Sora, and Altman’s earlier assertion that artificial general intelligence (AGI) would be realized by 2025. He quipped, “At least this is good news for budget-conscious gamers, as those 8,000 Nvidia chips are likely now available.”
“Nonetheless, that hasn’t deterred ministers from enthusiastically embracing the AI hype,” Hegarty continued. “In January 2025, then-tech secretary Peter Kyle declared that a new supercomputer in Essex would become ‘the largest UK sovereign AI data center’ by the end of 2026 and represent ‘a fresh start for our economy and for working individuals.’ A year later, however, the ‘supercomputer’ was still just a construction site.” A previous investigation by The Guardian noted that no groundwork had commenced on the supercomputer site, located 12 miles north of London.
“The government must break its troubling habit of credulously accepting every dubious assertion made by Big Tech — including OpenAI — especially the notion that they can blanket the UK with energy-intensive data centers without undermining our climate change efforts,” Hegarty stated.
Rising energy costs, exacerbated by the ongoing conflict between the US and Israel against Iran, are anticipated to hinder or halt AI data center projects globally. Before the conflict escalated, the UK’s industrial electricity rates were already the highest in Europe.
“OpenAI’s decision to pause its flagship UK investment serves as a clear warning: the UK is becoming increasingly expensive for construction,” said Sam Richards, CEO of the pro-growth advocacy group Britain Remade. “When global tech companies highlight exorbitant energy costs and sluggish regulatory processes, it is imperative that ministers take notice and respond effectively.”
Andy Lawrence from the Uptime Institute noted that OpenAI, Nscale, and the government each had valid reasons for delaying the project at this time. He pointed out that the government had numerous concerns regarding energy and costs, while OpenAI was apprehensive about competition from Anthropic, and Nscale faced challenges in acquiring necessary expertise and equipment.
“The government was unable to provide sufficient commitments to act as a client. I believe the overall demand for this initiative was, and still is, unclear. The urgency surrounding the project has diminished,” Lawrence added.
Nscale has been contacted for further comments.
