At Microsoft Build 2026, Microsoft unveiled Majorana 2, its latest quantum computing chip, representing a significant advancement in the company’s mission to develop a scalable, commercially viable quantum computer. The announcement highlights Microsoft’s long-term vision of fitting up to one million qubits on a single chip small enough to fit in the palm of a hand.

A key breakthrough with Majorana 2 is the dramatic improvement in qubit reliability. Microsoft reported that the chip’s topological qubits are 1,000 times more reliable than those in the previous generation, achieving a mean qubit lifetime of 20 seconds and reaching stability levels of up to one minute in certain cases. This marks a substantial leap compared to conventional quantum computing approaches, where qubits often remain stable only for microseconds.

The company also revealed that advances in agentic AI played a crucial role in accelerating quantum research, helping engineers overcome challenges related to reliability, error correction, and scalability. Microsoft believes these developments keep it on track to deliver a commercially relevant quantum computer by 2029.