Article

Rigetti Computing, Inc. has revised its roadmap, delaying the general availability of its 108-qubit quantum computing system, Cepheus™-1-108Q, to the end of Q1 2026. The delay is attributed to complexities with tunable couplers, prompting additional iterations for system optimization.

Rigetti reported a median two-qubit gate fidelity of 99% for the 108-qubit system, aiming for 99.5%. Cepheus-1-108Q, based on twelve 9-qubit chiplets and utilizing a modular chip architecture, will be Rigetti's highest qubit count system and is positioned as the largest modular quantum computing system in the industry. The company operates quantum computers via its Rigetti Quantum Cloud Services platform, supporting enterprise, government, and research clients.