Rigetti Computing delays 108-qubit system to end of Q1 2026

Rigetti Computing Inc. (NASDAQ: RGTI) announced it is revising its roadmap and delaying the general availability of its 108-qubit quantum computing system, Cepheus™-1-108Q, to around the end of the first quarter of 2026.

The company cited complexities with tunable couplers as the reason for the delay. "We encountered complexities with our tunable couplers and have decided to run another iteration of our chip to further optimize the system and improve fidelity," said CEO Dr. Subodh Kulkarni.

Rigetti reported achieving a median two-qubit gate fidelity of 99% on its 108-qubit system, 99.7% on its 9-qubit system, and 99.6% on its 36-qubit system. The company aims to achieve 99.5% median two-qubit gate fidelity for the Cepheus-1-108Q system.

The Cepheus-1-108Q system is based on twelve 9-qubit chiplets and uses Rigetti's modular chip architecture. The system will be the company's highest qubit count system and what Rigetti describes as the industry's largest modular quantum computing system.

Rigetti operates quantum computers through its cloud platform and sells on-premises quantum computing systems ranging from 9 to 108 qubits. The company manufactures its chips at Fab-1, which it describes as the industry's first dedicated quantum device manufacturing facility.

The information is based on a company press release statement.

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