In 2019, Google previously did a quantum computation in 200 seconds that would have taken the fastest supercomputer at that time 10,000 years. But IBM dismissed its claims, arguing that a classical computer could do the same calculation with greater "fidelity" in 2.5 days and argued that "quantum supremacy" had yet to be achieved.

Google has unveiled a new chip that it says reduces errors and vastly outperforms standard benchmarks.