Quantum/Machines/IonQ Tempo
USA · operational · Trapped ions
IonQ Tempo
IonQ Tempo is a trapped ions quantum computer operated by IonQ in USA. It has 100 physical qubits. It ranks 2 of 15 trapped ion machines in this table by physical qubit count. 5 sourced specs are in the spec sheet. 1 published benchmark or milestone record are listed below, each marked by who measured it.
Also known as Tempo
IonQ's 100-qubit barium system, reported at #AQ 64 in September 2025, three months ahead of IonQ's schedule. IonQ's page describes 99.9 percent two-qubit fidelity as a target, so no measured fidelity is recorded here. IonQ announced in December 2025 that a Tempo will be delivered to KISTI in South Korea for integration with KISTI-6, but no delivery date is given, so that unit is not listed separately.
Spec sheet
Technical details as the builder or a paper states them, each with its own source. A blank is a fact we could not source, not a zero. Fidelity and coherence figures are in the benchmark table below.
| Spec | Value | Basis | Note | Source |
|---|---|---|---|---|
| Processor | IonQ Tempo, fifth-generation IonQ system with 100 qubits | Vendor reported | IonQ calls Tempo its fifth-generation quantum computer; IonQ's Tempo page gives 100 as a target qubit count and trade press reports a 100-qubit system. | ionq.comquantumcomputingreport.com |
| Qubit type | Barium (Ba+) trapped ions | Vendor reported | Described as IonQ's first barium processor in 2025 analyst-day coverage and as a barium system in a 2024 IonQ release; the current Tempo page does not name the species. | quantumcomputingreport.comthequantuminsider.com |
| Access and pricing | Inquiry-based; not listed among IonQ's public cloud backends in its docs | Vendor reported | IonQ's Tempo page offers an inquiry form; the IonQ docs backend table checked on 2026-10-09 lists only Forte, Forte Enterprise, Aria and Harmony hardware. | ionq.comdocs.ionq.com |
| Predecessor | IonQ Forte | Vendor reported | Trade press compares Tempo with the earlier Forte Enterprise machine at #AQ 35. | quantumcomputingreport.comionq.com |
| Successor | IonQ Superion 256 | Vendor reported | IonQ's Superion release names Tempo as its most recent previous generation. | ionq.comquantumcomputingreport.com |
Published benchmark figures
These are numbers the builder or a paper reports for this machine, not results from a common test. The basis column says who measured them. What the metrics mean and why they are not comparable across technologies.
| Metric | Value | Measured | Basis | Note | Source |
|---|---|---|---|---|---|
| Algorithmic qubits (#AQ) | 64 | 2025-09 | Vendor reported | IonQ reported #AQ 64 on 100-qubit Tempo, three months ahead of schedule | quantumcomputingreport.comionq.com |
Timeline
- 2026-10: Status checked: operational
More from IonQ
- IonQ Harmony (decommissioned, 11 qubits)
- IonQ Aria (decommissioned, 25 qubits)
- IonQ Forte (operational, 36 qubits)
- IonQ Superion 256 (under construction, 256 qubits)
Comparable trapped ion machines
Closest in physical qubit count within the same technology. Counts of different qubit types are not interchangeable across technologies.
| Machine | Operator | Qubits | Status |
|---|---|---|---|
| Quantinuum Helios | Quantinuum | 98 | operational |
| Quantinuum H2 | Quantinuum | 56 | upgraded |
| IonQ Superion 256 | IonQ | 256 | under construction |
| IonQ Forte | IonQ | 36 | operational |
| IonQ Forte Enterprise at EPB | EPB | 36 | operational |
| IonQ Forte Enterprise at QuantumBasel | QuantumBasel | 36 | operational |