Rigetti delays 108-qubit Cepheus-1-108Q general availability to end of Q1 2026

Rigetti Computing, Inc.

Cepheus-1-108Q now expected to reach general availability around end of Q1 2026, previously earlier timeline.
Median two-qubit gate fidelity achieved: 99% on 108-qubit, 99.7% on 9-qubit, 99.6% on 36-qubit systems.
CEO cites complexities with tunable couplers; company running another chip iteration to optimize fidelity.
System uses twelve 9-qubit chiplets and will be Rigetti's highest qubit count modular system.

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