Last November IBM announced with much fanfare their new 433-qubit superconducting quantum processor, named Osprey. Skeptics wanted to see the technical specifications before deciding whether this represented an important breakthrough or not. A few weeks ago the device (with 413 working qubits) finally became available for cloud users. Some technical specifications can be found here.
Disappointingly, the quantum volume proposed by IBM themselves as a better measure of quantum processor performance than the raw qubit count is not yet available for this device. Presumably the slightly lower gate fidelities reported mean that the quantum volume does not exceed that achieved on their smaller devices with higher gate fidelity.
Meanwhile, Quantinuum announced their new trapped ion quantum processor with 32 fully-connected qubits and a whopping quantum volume of 65,536 (for reference, the best reported quantum volume from a cloud-accessible IBM device is 128). The announcement coincided with the upload of preprints to arXiv using the device to study quantum states with topological order and benchmarking its performance using various metrics.
metriq is a great resource for keeping track of all the different quantum processor platforms and devices and comparing their reported fidelities. Raw qubit counts are not meaningful without knowing the gate fidelities and device connectivity!
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