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IBM says it has been selected for Stage C of DARPA’s Quantum Benchmarking Initiative, moving its program into independent evaluation that includes testing quantum hardware. IBM’s planned Quantum Starling system is targeted for 2029, while DARPA’s broader initiative is assessing whether an industrially useful, fault-tolerant quantum computer can be built by 2033.
IBM has been selected for Stage C of the U.S. Defense Advanced Research Projects Agency’s Quantum Benchmarking Initiative, advancing the company into a phase where independent experts will test and assess its quantum hardware and its path to a fault-tolerant computer. The initiative is evaluating whether an industrially useful quantum computer—one whose computational value exceeds its cost—can be built by 2033.
IBM said the Stage C review will be conducted by DARPA’s independent verification and validation team. The evaluation moves beyond examination of technical concepts and development plans toward testing companies’ hardware and assessing their technology, systems engineering and architectures. The announcement does not describe specific test results or provide a timetable for the assessment.
The company’s stated goal is to deliver IBM Quantum Starling in 2029 as a fault-tolerant system. IBM says Starling will combine work in error correction, processor design and systems engineering. The 2029 date is IBM’s target, not a delivery date verified by DARPA through the Stage C process.
IBM said it has passed the initiative’s first two stages, which considered an initial technical concept and then a more detailed research and development plan, including risks and mitigation approaches. The company also cited progress on hardware components for fault tolerance and error-correction decoding, but the supplied announcement does not include independent findings confirming those claims.
Independent Testing Reaches Hardware
Stage C matters because it shifts the initiative’s review from plans and proposals toward evaluation of hardware. Independent testing can give DARPA a basis to examine whether a company’s proposed route to fault tolerance is supported by working technology and a credible engineering program. Selection for this phase is a milestone in the review, but it is not a finding that IBM has built a fault-tolerant computer or that its planned system will meet DARPA’s cost-and-value test.
The initiative also addresses a practical question beyond whether quantum devices can perform calculations: whether a sufficiently capable system would produce computational benefits worth its cost. That distinction is relevant to organizations considering long-term investments in quantum research. IBM’s continued participation keeps its approach under evaluation, while the independent review may clarify how its hardware and roadmap stand against the program’s objectives.
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How IBM Reached Stage C
DARPA launched the Quantum Benchmarking Initiative in 2024 to assess whether an industrially useful, fault-tolerant quantum computer can be built by 2033. DARPA defines the goal in economic as well as technical terms: the system’s computational value must exceed its cost. The supplied material does not set out a specific measurement formula for that comparison.
The initiative’s earlier phases focused on proposals and planning. Stage A asked organizations for an initial technical concept with a plausible path to realization. Stage B required a comprehensive research and development plan, including risks and ways to address them. Stage C adds independent hardware evaluation. IBM’s selection means it advances within this process; it does not establish that all participants or the initiative have reached the same stage.
IBM has previously announced its intention to build Quantum Starling and has described a combination of error correction, processor design and systems engineering as central to that effort. The company also says its quantum computers are used by a network of more than 340 organizations. Those are IBM’s statements in the supplied announcement, not findings from DARPA’s Stage C evaluation.
“Advancing to the third stage of DARPA’s Quantum Benchmarking Initiative validates the strength of IBM’s path to building a fault-tolerant quantum computer.”
— Jay Gambetta, director of IBM Research and an IBM Fellow
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Testing Results Are Not Yet Public
The announcement does not specify which IBM hardware will be tested, what benchmarks or thresholds the independent team will apply, or how long Stage C will take. It also provides no test results and does not say whether DARPA has endorsed IBM’s 2029 delivery target.
It remains unclear how the initiative will quantify whether computational value exceeds cost, and what evidence will count as demonstrating an industrially useful fault-tolerant system. IBM’s claims about its technical progress and the reach of its quantum-computing network have not been independently substantiated in the supplied material. Stage C selection should not be read as proof that the system is complete or that the 2033 program goal will be met.
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DARPA’s Hardware Review Proceeds
IBM will proceed to evaluation by DARPA’s independent verification and validation team, which the announcement says will test participant hardware and review technology, systems engineering and architectures. No schedule for testing or publication of findings was included in the announcement. The next substantive milestone will be information about the scope and results of that review, if released by DARPA or IBM.
IBM says it continues to target 2029 for Quantum Starling, while DARPA’s initiative is aimed at determining whether an industrially useful fault-tolerant computer can be built by 2033. Those are separate milestones: the company’s delivery plan remains a target, and the broader program’s assessment is still underway.
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Key Questions
What does IBM’s selection for Stage C mean?
It means IBM is moving into a phase of DARPA’s initiative that includes independent evaluation and hardware testing. It does not mean DARPA has certified IBM’s system as fault-tolerant.
What is DARPA trying to determine?
DARPA launched the initiative to assess whether an industrial-useful, fault-tolerant quantum computer can be built by 2033, with computational value exceeding its cost.
When does IBM plan to deliver Quantum Starling?
IBM says it expects to deliver the system in 2029. That is the company’s stated target; the announcement does not say DARPA has verified the schedule.
Have DARPA’s tests confirmed IBM’s claims?
No results are reported in the announcement. IBM has been selected to enter the evaluation phase, but the testing outcomes and assessment criteria have not been made public in the supplied material.
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