Rigetti Ankaa-3 (84-Qubit Superconducting Cloud)

Rigetti Computing's Ankaa-3 processor occupies the most accessible tier of high-performance superconducting quantum computing in 2026. The 84-qubit system, launched in December 2024 and available on Amazon Braket and Microsoft Azure Quantum in Q1 2025, achieved a 99.5% median two-qubit gate fidelity — competitive with IBM Heron on a per-gate basis. Rigetti's Cepheus-1 chiplet architecture, where multiple 9-qubit chiplets are interconnected to form larger arrays, enables modular scaling without full processor redesigns. The 36-qubit Cepheus-1-36Q demonstrated 99.5% two-qubit fidelity using four interconnected chiplets in 2025, validating the chiplet approach at scale. Rigetti has operated quantum computers over the cloud continuously since 2017 — longer than any competitor — giving it the most mature quantum cloud operations infrastructure in the industry. The Rigetti Quantum Cloud Services platform (QCS) provides direct processor access with the lowest latency quantum cloud interface commercially available, critical for iterative quantum algorithms requiring rapid feedback. Rigetti's client base spans finance, insurance, pharmaceuticals, defense, and energy, with active government contracts. In 2025-2026, Rigetti secured approximately $5.7 million in purchase orders for two on-premises quantum computing systems. Rigetti's roadmap targets 100+ qubit systems with sub-1% two-qubit error rates by late 2026.