Rigetti has delayed general availability of its 108-qubit Cepheus-1-108Q system to Q1 2026 to further improve gate fidelity and system performance.

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Rigetti Computing has delayed the general availability of its 108-qubit Cepheus-1-108Q quantum processor to the end of Q1 2026. The postponement allows for additional testing and a new chip iteration to address tunable coupler complexities and improve two-qubit gate fidelity toward a 99.5% median target. The company currently reports 99% median two-qubit gate fidelity on the 108-qubit system, with higher fidelities of 99.7% and 99.6% on smaller 9-qubit and 36-qubit systems respectively. The Cepheus-1-108Q uses a modular architecture with twelve 9-qubit chiplets and will be Rigetti's highest qubit count system.

Rigetti Updates Timeline for Cepheus-1-108Q Quantum Processor