Rigetti Ankaa-3 (84-Qubit Superconducting Cloud)

Rigetti Ankaa-3 delivers the most accessible high-performance superconducting quantum computing in 2026, with its 84-qubit system achieving a 99.5% median two-qubit gate fidelity—competitive with IBM Heron on a per-gate basis. Launched in December 2024 and available on Amazon Braket and Microsoft Azure Quantum by Q1 2025, it leverages the Cepheus-1 chiplet architecture, where multiple 9-qubit chiplets interconnect to form larger arrays. A 36-qubit variant (Cepheus-1-36Q) validated this modular approach in 2025, achieving 99.5% fidelity across four interconnected chiplets. Rigetti's cloud operations, running continuously since 2017, outlasts any rival, offering the most mature quantum cloud infrastructure. Its Quantum Cloud Services platform provides directly accessible, low-latency processor access—critical for iterative algorithms. Clients span finance, insurance, pharmaceuticals, defense, and energy, with $5.7 million in 2025-2026 purchase orders for two on-premises systems. The roadmap projects 100+ qubit systems with sub-1% two-qubit error rates by late 2026.