This article announces the general availability of Rigetti Cepheus-1-108Q, a 108-qubit superconducting quantum processor now available on Amazon Braket.

• First gate-based quantum device with over 100 qubits on Amazon Braket
• Uses modular multi-chip architecture with twelve 9-qubit chiplets tiled in 3×4 array
• Achieves median two-qubit gate fidelity of 99.1% with ~60 nanosecond gate speeds
• Transitions from iSWAP to CZ gates for better error correction compatibility
• Implements adiabatic CZ gate scheme to reduce incoherent and leakage errors
• Available in US West (N. California) region with 20 hours daily processing availability
• Supports multiple frameworks: Braket SDK, CUDA-Q, PennyLane, and Qiskit
• Offers pulse-level control for advanced noise and error mitigation research
• Provides calibration data for qubit selection and circuit optimization

Cepheus-1-108Q expands Amazon Braket's quantum hardware portfolio, enabling researchers and developers to run larger, more complex quantum algorithms with improved fidelity.