OpenAI signed a lease for 544 desks in King's Cross. It has 200 people in London.
That's the gap, and it's the whole story. The company announced its first permanent London office on Monday — 88,500 square feet at Regent Quarter, capacity 544 staff, expected to open in 2027. The press coverage called it a hiring boom. The numbers say something different. OpenAI has roughly 200 employees in the UK capital today, spread across research, engineering, policy, and the usual functions a company runs before it decides to plant a flag. A 544-seat lease is a ten-year bet on headcount that doesn't exist yet — or a property play dressed as an expansion announcement.
Four days earlier, OpenAI confirmed it had paused Stargate UK, the data center project it launched last September in partnership with Nvidia and Nscale, timed to coincide with Donald Trump's visit to Britain and the announcement of a $150 billion UK-US investment package. The stated reasons: high industrial energy costs and the UK's regulatory environment. Industrial electricity prices in the UK are among the highest in the world, according to the same CNBC report that covered both announcements. OpenAI didn't get the compute it wanted. So it took the office space instead.
The sequencing matters. Stargate UK was the infrastructure bet — the physical plant that would let OpenAI run the kind of large-scale training and inference jobs that frontier AI requires. Without it, the London office is a real estate holding, not a research hub. Phoebe Thacker, who carries the dual titles of global head of data research programmes and London site lead, will be managing a headcount gap of roughly 344 people until the lease opens in 2027, assuming no further hires between now and then. That's either extraordinary confidence in UK hiring pipelines or extraordinary confidence in UK property values — possibly both.
For the UK government, the optics are awkward. Prime Minister Keir Starmer's AI Opportunity Action Plan, launched in January, made data center expansion a national priority. The plan explicitly aimed to make the UK a destination for AI compute infrastructure. Stargate UK was the flagship private-sector commitment under that umbrella. Its pause four days before OpenAI announced a major London lease means the government can claim 544 office jobs while the compute jobs — the ones Starmer actually pitched — quietly evaporated. The Department for Business and Trade declined to comment for this article.
There is a charitable reading. OpenAI may be building the recruitment infrastructure to attract talent that will eventually justify the compute investment, or it may be running a long game on regulatory change that makes the UK viable again. The lease runs for years. The Stargate pause was not described as a cancellation. But "paused" in infrastructure announcements has a poor track record of becoming un-paused.
What's actually being built at Regent Quarter, beyond office floors and meeting rooms, remains unclear. OpenAI's UK operations today handle research, policy, and customer-facing functions — important work, but not the kind that requires 88,500 square feet of King's Cross real estate. The company declined to specify what workloads the London office would house or whether it plans to resubmit the Stargate UK project with a different energy profile.
The lease closes a chapter on the hotel-room era. What replaces it is a very large empty floor plan and a compute gap that nobody is explaining.
