Cleveland Clinic IBM Quantum System One

Cleveland Clinic IBM Quantum System One is a superconducting circuits quantum computer operated by Cleveland Clinic in USA. It has 127 physical qubits. It ranks 12 of 43 superconducting machines in this table by physical qubit count. 6 sourced specs are in the spec sheet. 1 published benchmark or milestone record are listed below, each marked by who measured it.

Also known as Discovery Accelerator IBM Quantum System One

IBM Quantum System One in the Lerner Research Institute on the Cleveland Clinic main campus, described by the clinic as the first quantum computer devoted to healthcare research. It uses a 127-qubit Eagle processor. The clinic says it will host a Quantum System Two of 1,000+ qubits within three years of the launch; no such system is confirmed in the pages consulted. IBM's 2022 installation notice does not state a qubit count, so the figure rests on the clinic's page.

Spec sheet

Technical details as the builder or a paper states them, each with its own source. A blank is a fact we could not source, not a zero. Fidelity and coherence figures are in the benchmark table below.

Spec	Value	Basis	Note	Source
Processor	Eagle (127 qubits) at launch; IBM said in May 2026 that 156-qubit Heron processors ran within the Clinic machine	Vendor reported	The Clinic's page gives 127-qubit Eagle and IBM's 5 May 2026 release says Heron processors ran inside the Cleveland Clinic and RIKEN computers, so the current processor is unconfirmed.	consultqd.clevelandclinic.org newsroom.ibm.com
Qubit type	fixed-frequency transmon qubits	Peer reviewed	A Nature paper describes the 127-qubit Eagle ibm_kyiv as fixed-frequency transmons and a 2024 survey says IBM processors are transmon-based; family-level; it also holds for Heron r2 apart from the qubit count.	pmc.ncbi.nlm.nih.gov arxiv.org
Topology	heavy-hex lattice	Peer reviewed	The Nature paper gives heavy-hex connectivity for Eagle and the 2024 survey says Eagle uses a heavy-hexagonal layout; family-level; it also holds for Heron r2 apart from the qubit count.	pmc.ncbi.nlm.nih.gov arxiv.org
Cooling and environment	dilution refrigerator inside the System One enclosure	Vendor reported	IBM's blog says its quantum processors sit in a dilution refrigerator that reaches 15 to 20 millikelvin; this is an IBM-wide statement, not specific to this unit.	ibm.com
Access and pricing	on-premises at the Cleveland Clinic Discovery Accelerator, for Cleveland Clinic research	Vendor reported	The Clinic says it has its own quantum computer rather than cloud queues; no price is published.	consultqd.clevelandclinic.org
Successor	IBM Quantum System Two (1,000+ qubit class) announced for the Discovery Accelerator	Vendor reported	The Clinic said in 2023 it would host one within three years; no installation was confirmed in the pages consulted.	consultqd.clevelandclinic.org

Milestone claims

Same 12,635-atom protein result; IBM says Heron processors ran inside the Cleveland Clinic machine, which conflicts with this record listing 127 qubits. Preprint (2026-05-05, vendor reported) newsroom.ibm.com riken.jp

Timeline

2022-10-18: Announced
2023: First operational
2023-04-19: Status checked: operational

Comparable superconducting machines

Closest in physical qubit count within the same technology. Counts of different qubit types are not interchangeable across technologies.

Machine	Operator	Qubits	Status
IBM Eagle	IBM	127	decommissioned
University of Tokyo IBM Quantum System One	University of Tokyo	127	operational
RPI IBM Quantum System One	Rensselaer Polytechnic Institute	127	operational
Yonsei IBM Quantum System One	Yonsei University	127	operational
IBM Nighthawk	IBM	120	operational
Rigetti Cepheus-1-108Q	Rigetti Computing	108	operational