Quantum computing firm Rigetti has announced the general availability of its 108-qubit quantum computing system, Cepheus-1-108Q.

Comprising 12 interconnected nine-qubit chiplets, the system triples the number of qubits and chiplets from Rigetti’s previous 36-qubit system, Cepheus-1-36Q. It will be accessible to customers via the Rigetti Quantum Cloud Services (QCS) Platform and through Amazon Braket.

In a statement, Rigetti said it is releasing Cepheus-1-108Q now in response to growing customer interest and will continue to improve its performance throughout 2026. At present, the system is performing at a 99.1 percent median two-qubit gate fidelity with a gate speed of ~60 ns and a 99.9 percent median single-gate fidelity, the company said.

“Cepheus-1-108Q is a milestone that validates our ambitious approach to scaling quantum computers,” said Dr. Subodh Kulkarni, Rigetti CEO. “Our proprietary chiplet-based architecture is paving the way toward higher fidelity, higher qubit systems that will ultimately enable fault-tolerant quantum computing.

“We are proud of the progress we have made in delivering a system at this scale. The innovations we’ve developed while designing this system give us confidence in our vision and approach to building the next generation of quantum computers. We will continue to improve fidelity as we scale to higher qubit counts and deploy new systems as we reach important performance milestones while maintaining gate speeds that are roughly 1,000-10,000 times faster than other modalities such as trapped-ion and neutral-atom systems.”

Founded in 2013 to commercialize quantum computing technologies, last month, Rigetti announced plans to invest up to $100 million in the UK to accelerate quantum computing development.

The pledge represents the company’s first major investment outside of the US and will see Rigetti deploy a quantum computer with more than 1,000 qubits by the end of the decade.