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IBMs 433 Qubit Quantum Processor and Beyond
These are more powerful qubits than the 5000+ adiabatic qubits from DWave Systems. Most other quantum computer companies are at about 50-100 qubits.
The number of usable error-mitigated qubits is being improved. Error-mitigated qubits with over 99.99% reliability could enable quantum computers more powerful than classical exaflop supercomputers for some applications.
Startup Xanadu's has the Borealis chip, which was tested with 216 qubits. Xanadu claims that they achieved quantum supremacy with a faster operation than classical supercomputers for one algorithm.