Catalog — QPU record · Rigetti · Superconducting

Ankaa-3

Name: Ankaa-3 specifications
Creator: QPU137

Ankaa-3 is a superconducting gate-based processor by Rigetti with 84 qubits (2024). Below: every publicly disclosed figure with its source, method, and vendor-claim status — plus what is not disclosed, recorded as findings.

Data as of 2026-08-19Compile a circuit for this class of device Compare

Measurement records9 disclosed · 1 not disclosed · 3 sources

Select a figure to open its record

Qubit count (qubit_count_physical)84 qubitsvendor claim

Vendor claim

Source: Rigetti press release 'Launches 84-Qubit Ankaa-3 System' and rigetti.com/what-we-build QPU table ('Qubits 84') · published 2024-12-23
Method: VENDOR_UNSPECIFIED
Notes: AWS Braket docs also describe Ankaa-3 as 'an 84-qubit device'. A Google search snippet of the JS-only live calibration page qcs.rigetti.com/qpus showed '82 qubits' operational at some point; that page could not be fetched (JavaScript SPA) so the 82 figure is unverified.
Citation key: [rigetti/ankaa-3:qubit-count-physical:2026-08-19]

Two-qubit gate quality (two_qubit_gate_fidelity_iswap)99.0 %vendor claim

Vendor claim

Source: Rigetti press release Dec 23, 2024 ('successfully halving error rates in 2024 to achieve a median 99.0% iSWAP gate fidelity') and rigetti.com/what-we-build · published 2024-12-23
Method: not stated in press release ('median 99.0% iSWAP gate fidelity'); rigetti.com/what-we-build table labels it 'Median Fidelity (per op.) — Two-qubit gates (ISWAP) 99.0%'
Aggregation: median
Notes: The headline '99.5% median two-qubit gate fidelity' refers to fSim gates, not iSWAP — see separate fact. what-we-build page (fetched 2026-08-19 session) still lists 99.0% ISWAP median.
Citation key: [rigetti/ankaa-3:two-qubit-gate-fidelity-:2026-08-19]

Two-qubit gate quality (two_qubit_gate_fidelity_fsim)99.5 %vendor claim

Vendor claim

Source: Rigetti press release Dec 23, 2024 · published 2024-12-23
Method: not stated; press release wording: 'demonstrating 99.5% median fidelity fSim gates'
Aggregation: median
Notes: PR: fSim gates are 'faster (median 56 nanoseconds), more specialized... useful for specific algorithms such as random circuit sampling'. The universal gate offered to users is iSWAP.
Citation key: [rigetti/ankaa-3:two-qubit-gate-fidelity-:2026-08-19]

Single-qubit gate quality (one_qubit_gate_fidelity)99.9 %vendor claim

Vendor claim

Source: rigetti.com/what-we-build QPU table: 'Median Fidelity (per op.) — Single-qubit gates 99.9%'
Method: not stated on page
Aggregation: median (per op.)
Citation key: [rigetti/ankaa-3:one-qubit-gate-fidelity:2026-08-19]

Coherence (T1)22 µsvendor claim

Vendor claim

Source: rigetti.com/what-we-build QPU table (fetched raw HTML this session)
Method: VENDOR_UNSPECIFIED
Aggregation: median (table header 'Median Time Duration (µs)')
Citation key: [rigetti/ankaa-3:t1:2026-08-19]

Coherence (T2)19 µsvendor claim

Vendor claim

Source: rigetti.com/what-we-build QPU table
Method: VENDOR_UNSPECIFIED
Aggregation: median (table header 'Median Time Duration (µs)')
Citation key: [rigetti/ankaa-3:t2:2026-08-19]

Gate duration (two_qubit_gate_duration_iswap)72 nsvendor claim

Vendor claim

Source: Rigetti press release Dec 23, 2024: 'higher fidelity and universal iSWAP gates... with a median gate time of 72 nanoseconds' · published 2024-12-23
Method: VENDOR_UNSPECIFIED
Aggregation: median
Notes: fSim gates: median 56 ns per the same release.
Citation key: [rigetti/ankaa-3:two-qubit-gate-duration-:2026-08-19]

Readout (readout_fidelity)not publicly disclosed

Not publicly disclosed — checked 2026-08-19

Finding: No public disclosure found. This is a recorded, dated finding — we do not substitute an estimate or borrow a figure from a sibling device.
Sources queried: Ankaa-3 launch press release (investors.rigetti.com, fetched in full), rigetti.com/what-we-build spec table (fetched raw HTML), AWS Braket developer guide Rigetti section, docs.rigetti.com/qcs (JS-only), qcs.rigetti.com/qpus (JavaScript SPA — no static content)
Notes: Per-shot calibration data exists behind login on the Amazon Braket console Devices tab / GetDevice API, but no public readout fidelity figure was found.

Deployment date (deployment_date)2024-12-20 (what-we-build: 'Ankaa-3 was deployed on December 20, 2024'); public launch announced 2024-12-23vendor claim

Vendor claim

Source: rigetti.com/what-we-build and Dec 23, 2024 press release
Method: VENDOR_UNSPECIFIED
Citation key: [rigetti/ankaa-3:deployment-date:2026-08-19]

Pricing model (pricing_model_exists)yes — Amazon Braket on-demand per-task + per-shot pricing and hourly reservation mode for Rigetti hardware (pricing table row labeled 'Rigetti | Cepheus'); QCS access via Rigetti partnershipvendor claim

Vendor claim

Source: Amazon Braket pricing page
Method: VENDOR_UNSPECIFIED
Notes: Braket also enforces a 20,000-gate-per-compiled-circuit limit on Ankaa-3 (Braket developer guide).
Citation key: [rigetti/ankaa-3:pricing-model-exists:2026-08-19]

Topology

square-lattice — Ankaa-class chip architecture with a square lattice of qubits and tunable couplers; 84-qubit monolithic chip with 3D signal delivery. Vendor PR: 'square lattice of qubits and tunable couplers'.

SOURCE: Rigetti Computing Launches 84-Qubit Ankaa-3 System; Achieves 99.5% Median Two-Qubit Gate Fidelity Milestone (press release)

Native gate set

1q rx (angles restricted to ±π/2 or ±π) · rz (arbitrary)
2q iswap

SOURCE: Amazon Braket Developer Guide — Submitting quantum tasks to QPUs (Rigetti section): 'With verbatim compilation, Ankaa-3 supports the following native gates: rx, rz, iswap' and 'can run the rx gate with only the angles of ±π/2 or ±π'

Cloud access

Rigetti Quantum Cloud Services (QCS)
Amazon Braket (arn:aws:braket:us-west-1::device/qpu/rigetti/Ankaa-3, listed as available)
Microsoft Azure Quantum (added Q1 2025 per vendor PR; NOT in Azure Rigetti target table as of page updated 2026-04-10)

Corrections

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QPU137 is independent and is not affiliated with, endorsed by, or sponsored by Rigetti. Figures above are public disclosures recorded with their sources on 2026-08-19; vendor claims are labeled as such and may not be directly comparable across measurement methods — see methodology.