Bull has been selected by the EuroHPC Joint Undertaking (EuroHPC JU) and the Lumi AI factory consortium to deliver the Lumi-AI supercomputer.

Owned by EuroHPC JU, Lumi-AI is scheduled for deployment in the second half of 2027 and will be the upgraded successor to the current 380 petaflops Lumi supercomputer.

Funding for the €387.8 million ($450m) AI supercomputer is shared equally between EuroHPC JU and the Lumi AI Factory consortium, which includes Finland, Czechia, Denmark, Estonia, Norway and Poland. Lumi-AI will be hosted at the CSC data center in Kajaani, Finland.

According to Bull, the liquid-cooled supercomputer will be based on the company’s latest BullSequana XH3500 architecture, and will be powered by AMD Instinct MI430X GPUs and 6th Gen AMD Epyc 256-core processors.

IBM will provide a “high-performance storage solution” based on its IBM Storage Scale offering, while Nokia will contribute data center networking expertise alongside Bull's BXI interconnect technology.

“With Lumi-AI, EuroHPC JU has now signed its sixth AI Factory procurement contract for a next-generation AI-optimized supercomputer,” said Anders Jensen, EuroHPC JU executive director. “Together, these systems will form a powerful European AI infrastructure ecosystem, enabling SMEs and startups to access world-class supercomputing resources, unlock the full potential of AI, and drive innovation, growth, and technological leadership across Europe.”

Emmanuel Le Roux, CEO of Bull, added: “Lumi-AI marks an important milestone not only for European AI, but also for Bull, building on our established track record in delivering AI Factories and exascale systems, and further reinforcing our European leadership in developing the most energy-efficient and complex AI infrastructures.”

In April 2026, the French state completed its acquisition of Bull, the artificial intelligence (AI), high-performance computing (HPC), and quantum subsidiary of Atos, following the signing of a €404m ($469m) share purchase agreement between Atos and the French State on July 31, 2025.

Its BullSequana HPC systems form the basis for a number of the world’s most powerful supercomputers, with its X series architecture supporting exascale-class systems, including Europe’s first exascale system, the Jupiter Booster.

That same month, Bull revealed it had secured a €30 million ($35m) five-year contract to provide AI-optimized infrastructure at Sweden’s Mimer AI factory, also based on Bull’s BullSequana XH3500 architecture.