IBM ibm_aachen

IBM · Apache-2.0 last capture 2026-04-17

ibm_aachen is a 156-qubit IBM quantum computer.

On its latest calibration (17 April 2026), a typical two-qubit operation failed about 1 in 700, better than 98% of the 65 other devices in this record.

Every figure below is the device's latest measurement of that metric, with its own date and source. See how the whole field is progressing →

Best 2Q fidelity
IBM · Apache-2.0
0.999308
fails about 1 in 1,450

Success rate of the chip's single best pair of qubits. The best pair flatters the chip; the typical one matters more.

Better than 97% of 65 other devices with this measurement
Measured 2026-04-17
Median 2Q error
IBM · Apache-2.0
0.00141979
fails about 1 in 700

How often a typical two-qubit operation on this chip fails, from the vendor's own calibration.

Better than 98% of 65 other devices with this measurement
Measured 2026-04-17
Median T1 (µs)
IBM · Apache-2.0
232.35

How long a typical qubit holds its state before it decays, in microseconds. Longer leaves more time to compute.

Better than 81% of 67 other devices with this measurement
Measured 2026-04-17
Median T2 (µs)
IBM · Apache-2.0
255.43

How long a typical qubit keeps its delicate quantum phase, in microseconds.

Better than 94% of 67 other devices with this measurement
Measured 2026-04-17
Median readout error
IBM · Apache-2.0
0.00738525
fails about 1 in 140

How often reading a typical qubit's value at the end gives the wrong answer.

Better than 97% of 67 other devices with this measurement
Measured 2026-04-17
Qubits
IBM · Apache-2.0
156

Physical qubits on the device. More only helps if they are good enough to use together.

Measured 2026-04-17

History

1 snapshot so far. A trend appears here once a metric has been measured on two different days.

Provenance

Source
IBM · Apache-2.0
Licence
Apache-2.0 · Qiskit fake backend calibration snapshot
Raw redistributable
yes
Captured
2026-04-17T10:29:46
Raw source (latest snapshot)
https://github.com/Qiskit/qiskit-ibm-runtime/blob/874340868b5bf3686a69145a43b16c9aba91c675/qiskit_ibm_runtime/fake_provider/backends/aachen/props_aachen.json

Cite this page

@misc{provenova_ibm_ibm_aachen,
  title        = {IBM ibm_aachen — calibration & benchmark history},
  howpublished = {\url{https://provenova.net/hardware/ibm/ibm_aachen}},
  publisher    = {Provenova},
  note         = {accessed 2026-10-20}
}

Compare with

vs ibm ibm_algiers 5 shared metrics vs ibm ibm_auckland 5 shared metrics vs ibm ibm_berlin 5 shared metrics vs ibm ibm_boston 5 shared metrics vs ibm ibm_brisbane 5 shared metrics vs ibm ibm_brussels 5 shared metrics vs ibm ibm_cairo 5 shared metrics vs ibm ibm_cusco 5 shared metrics

Data: real IBM device calibration published in Qiskit's fake backends (Apache-2.0). Rankings on the live leaderboard.