Issue Quantum advantage defined against any classical method

Summary

IBM defines quantum advantage as the moment a quantum computer can solve a problem with a demonstrable improvement over every classical method or resource. The improvement may be in accuracy, runtime or cost. Because the benchmark is the best classical alternative, the bar is deliberately high. IBM states that recent research points to this threshold likely being reached by the end of 2026. It then argues that reaching and using quantum advantage at scale will demand resources beyond any single organisation, which is why ecosystems become central.