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JUPITER: Europe's first exascale supercomputer

19 Nov 2025

JUPITER: Europe's first exascale supercomputer
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Summary is AI-generated, newsdesk-reviewed
  • Eviden's JUPITER is Europe's first exascale supercomputer, achieving 1 ExaFlop and top energy efficiency.
  • JUPITER ranks 4th worldwide, 1st in Europe for power; leads Green500 energy-efficient supercomputers.
  • Eviden's high-performance computing innovation boosts AI adoption, achieves sustainable digital future goals.
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Eviden, a brand under the Atos Group known for its advanced computing solutions, has announced the latest rankings of its systems in the TOP500 and Green500 lists, which detail the world's most powerful and energy-efficient supercomputers.

JUPITER, built by Eviden, is recognised as the 4th most powerful supercomputer globally and the most powerful in Europe, achieving the distinction of being the continent's first computer to surpass the symbolic ExaFlop barrier, which equates to one billion billion calculations per second.

Europe's exascale achievement

Notably, Eviden has also continued to lead the Green500 list, securing the top three positions with its systems KAIROS, ROMEO, and Levante GPU extension standing out for their energy efficiency.

JUPITER, in particular, has been acknowledged as the most energy-efficient among exascale-class supercomputers. Such accomplishments highlight Eviden's dedication to promoting innovation and sustainable growth within the field of high-performance computing.

JUPITER's development was a collaborative effort by the Jülich Supercomputing Centre in association with the EuroHPC Joint Undertaking and was procured by EuroHPC. As Europe's first exascale computer, it facilitates pioneering AI training and advanced scientific simulations across various sectors, including climate research, energy, medicine, and materials science. It has already supported over 100 projects, achieving significant milestones such as simulating a quantum computer with 50 qubits and modelling Earth systems at detailed resolutions.

Pioneering energy efficiency

JUPITER's Booster partition has been celebrated in the Green500 rankings as the most energy-efficient system

Ranked 4th on the TOP500 and pioneering Europe, JUPITER's Booster partition has been celebrated in the Green500 rankings as the most energy-efficient system among exascale-class computers. 

With an impressive output of 63 GigaFlops per watt, it excels in performance while minimising energy consumption compared to its peers when scaled to an equivalent 1 ExaFlop performance.

Constructed swiftly with sustainable principles, JUPITER is setting new global efficiency benchmarks and is poised to serve as the cornerstone of the JUPITER AI Factory, offering secure AI model access for various research and industrial purposes.

Top Positions in Green500

Eviden's leadership in sustainable computing is further reinforced by its capture of the top three ranks in the Green500, with KAIROS, ROMEO, and Levante GPU extension leading the list.

The Green500 ranking is pivotal as it measures GFlops per watt, signifying the number of calculations performed per energy unit consumed. A higher GFlop/Watt value indicates more efficient energy consumption and cost savings.

The company's success stems from significant innovations, notably in its patented Direct Liquid Cooling technology and energy-efficient high-performance computing applications, bolstered by intelligent software like Argos for real-time energy management. As demand for artificial intelligence and high-performance computing explodes, Eviden exemplifies sustainable development in the sector.

A Proud Achievement for Eviden

Bruno Lecointe, VP of HPC, HPC-AI, and Quantum Computing at Eviden, Atos Group, expressed pride: “Breaking the symbolic 1 ExaFlop ceiling, building the most energy-efficient Exascale supercomputer and leading the Green500 with the top three positions is a defining and proud moment for the Eviden teams.”

He highlighted that the future of computing encompasses not only scale and speed but also responsibility, emphasising the importance of delivering unparalleled power with minimal environmental impact.

As global demand for AI and high-performance computing surges, Eviden remains dedicated to innovating in ways that blend performance with efficiency, fostering a more sustainable digital landscape for science, industry, and society.

Understand how converged physical and cybersecurity systems can scale protection.

Show full press release

Eviden, the Atos Group product brand pioneering in advanced computing, announces the rankings of its 58 Eviden-built systems in the TOP500 and Green500, official listings of the world’s most powerful and most energy-efficient supercomputers. 

Amongst the 58 Eviden-built systems listed in the TOP500, JUPITER, through its Booster partition, remains the 4th most powerful supercomputer in the world and Europe’s 1st, marking a historic milestone as Europe’s first system to officially break the symbolic ExaFlop barrier – one billion billion calculations per second.

Eviden also leads the Green500 for the fourth edition in a row, claiming the top three spots with its Eviden-built systems KAIROS (CALMIP), ROMEO (URCA), and the Levante GPU extension (DKRZ) – and with JUPITER being recognised as the most energy-efficient of all existing exascale-class supercomputers.

Europe’s first exascale computer

These achievements underscore Eviden’s unwavering commitment to innovation, performance, and sustainability—accelerating the adoption of AI and large-scale simulation for science, research, and technological progress.

Developed by the Jülich Supercomputing Centre (JSC) in collaboration with the EuroHPC Joint Undertaking (EuroHPC JU) and procured by EuroHPC, JUPITER is Europe’s first exascale computer to reach that gigantic level of performance, enabling groundbreaking AI training and scientific simulations in fields like climate, energy, medicine, and materials research.

It has already powered over 100 projects, achieving milestones such as simulating a universal quantum computer with 50 qubits and modelling the entire Earth system at one-kilometer resolution.

Most energy-efficient supercomputer

Ranked 4th worldwide in the TOP500 and 1st in Europe, JUPITER Booster partition is also recognised by the Green500 as the most energy-efficient supercomputer amongst all exascale-class systems.

With 63 GigaFlops per watt, JUPITER Booster partition demonstrates the best performance-per-watt ratio, ensuring lower energy consumption, compared to its exascale competitors, assuming all systems are scaled to the same 1 ExaFlop performance.

Built in record time with sustainable design, JUPITER sets global efficiency standards and forms the core of the JUPITER AI Factory, soon offering secure access to AI models for research, start-ups, and industry.

Eviden leads the Green500 for the fourth edition in a row

Eviden has taken the lead in sustainable high-performance computing, claiming the top three positions in the Green500 ranking with KAIROS (#1 at 73 GFlops/Watt), ROMEO (#2 at 70 GFlops/Watt), and Levante GPU extension (#3 at 69 GFlops/Watt).

This ranking matters as GFlops per Watt measures how many calculations a system performs for every unit of energy consumed, with a higher GFlop/Watt indicating lower energy consumption and costs.

This success is the result of years of innovation, especially with Eviden’s patented fifth-generation Direct Liquid Cooling, expertise in HPC applications, and smart software like Argos for real-time energy optimisation. As AI and HPC demands soar, Eviden sets the benchmark for sustainable growth.

Proud moment for the Eviden teams

Bruno Lecointe, VP, global head of HPC, HPC-AI and Quantum Computing at Eviden, Atos Group said “Breaking the symbolic 1 ExaFlop ceiling, building the most energy-efficient Exascale supercomputer and leading the Green500 with the top three positions is a defining and proud moment for the Eviden teams.”

“These results demonstrate that the future of computing is not only about scale and speed, but also about responsibility, delivering unprecedented power while minimising environmental impact. As demand for AI and HPC accelerates globally, we remain committed to driving innovation that combines performance and efficiency, shaping a more sustainable digital future for science, industry, and society.”

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JUPITER: Europe's first exascale supercomputer reaches 1 ExaFlop, powers AI and scientific breakthroughs across fields, and is the world’s most energy-efficient exascale system, leading the Green500 rankings.

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