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IBM has been selected for Stage C of DARPA’s Quantum Benchmarking Initiative, moving its proposal from planning into independent testing and evaluation. IBM says it aims to deliver its fault-tolerant Quantum Starling system in 2029; DARPA’s broader initiative is assessing whether a quantum computer whose computational value exceeds its cost 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, moving the company into an evaluation phase in which independent experts will test its quantum hardware and assess its approach to building a fault-tolerant computer. IBM says it is targeting 2029 for its Quantum Starling system; DARPA’s initiative is examining whether a quantum computer whose computational value exceeds its cost can be built by 2033.
IBM said the third phase will involve DARPA’s independent verification and validation team examining company hardware and evaluating technology, systems engineering and architecture. The selection marks a move beyond written concepts and research plans, although the source material does not specify the tests’ schedule, duration or detailed criteria.
IBM has passed the initiative’s first two stages, according to the company. Stage A assessed initial technical concepts for a cost-effective, fault-tolerant quantum computer with a plausible path to realization. Stage B required a more complete research and development plan, including risks and proposed ways to address them. IBM’s selection for Stage C does not mean its system has been certified as fault-tolerant or that DARPA has endorsed its projected delivery date.
IBM says Quantum Starling will combine work in error correction, processor design and systems engineering. The company also says it has demonstrated core hardware components for fault tolerance and made progress on efficient error-correction decoding. These are company-reported developments; the supplied report does not provide independent measurements or technical results from DARPA’s review.
Independent Testing Begins for IBM
Stage C matters because the assessment is moving from plans to examination of hardware. Independent testing could give DARPA and the public a more substantive basis for judging IBM’s approach than company road maps alone. The phase is part of a wider effort to evaluate whether a fault-tolerant quantum computer can deliver enough computational value to justify its costs by 2033.
For IBM, the selection places its proposed route to Quantum Starling under outside scrutiny, but it is not a finding that the system will meet its 2029 target or deliver useful performance. The distinction matters: fault-tolerant quantum computing requires methods to detect and correct errors, and a credible development plan is not the same as a demonstrated, operational system.
The work may also be relevant to organizations exploring quantum computing in research and industry. IBM says more than 340 organizations use its quantum computers as scientific tools across fields including finance, health care and materials science. That reported use describes activity with current systems; it does not establish that those systems are fault-tolerant or that they already provide an economic advantage over classical computing.
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DARPA’s Three-Stage Review
DARPA launched the Quantum Benchmarking Initiative in 2024 to determine whether an industrially useful, fault-tolerant quantum computer can be built by 2033. The program defines success in economic terms: the computer’s computational value must exceed its cost. The initiative is a DARPA evaluation effort, not a public guarantee that a viable system will be achieved by that deadline.
The process has advanced through three stages. Stage A focused on initial technical concepts; Stage B examined detailed development plans and risk mitigation. Stage C brings selected participants into assessment by the initiative’s independent verification and validation team, including hardware testing. The supplied report says several Stage A performers were announced in April 2025 but does not list the companies selected for the current phase.
IBM announced its Quantum Starling plans last year and set a 2029 target for delivery of what it describes as its first fault-tolerant system. Its participation in DARPA’s initiative runs alongside work with industry, government and academic partners, according to the company. The DARPA review and IBM’s internal development timeline are related, but the source material does not say that DARPA has adopted or validated IBM’s schedule.
“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 Criteria and Timeline Remain Open
The announcement does not say when hardware testing will begin, how long Stage C will last, what specific benchmarks will be used or when DARPA expects to report its findings. It also does not provide details about the results of IBM’s earlier stages or the status of other companies in the initiative.
It remains unclear whether DARPA’s evaluation will publicly confirm particular hardware capabilities, how the initiative will compare competing approaches, or what evidence it will require to judge a system economically useful. IBM’s 2029 target is a company projection, while the 2033 date is the program’s stated goal for assessing whether a system can be built. Neither date is a confirmed outcome.
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DARPA’s Hardware Evaluation Proceeds
DARPA’s independent verification and validation team is expected to move into testing and assessment of the selected companies’ hardware and technical approaches. The source material does not give a timetable for that work or a date for the next public update. IBM says it will work with DARPA’s experts as the review proceeds.
The next meaningful developments will be details about the testing process, any findings made public by DARPA, and evidence of progress against IBM’s Quantum Starling roadmap. Until those are available, Stage C should be understood as entry into a more direct evaluation—not proof that fault-tolerant quantum computing has been achieved.
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Key Questions
What does IBM’s selection for Stage C mean?
It means IBM will move into a phase of DARPA’s initiative in which independent experts are to test its hardware and evaluate its approach. It does not mean DARPA has certified IBM’s system as fault-tolerant.
What is IBM Quantum Starling?
Quantum Starling is IBM’s proposed fault-tolerant quantum computer. IBM says it plans to deliver the system in 2029, combining work in error correction, processor design and systems engineering.
What is DARPA trying to establish by 2033?
DARPA’s Quantum Benchmarking Initiative is assessing whether an industrially useful fault-tolerant quantum computer can be built by 2033. The program defines a successful system as one whose computational value exceeds its cost.
Has DARPA confirmed IBM’s 2029 delivery target?
No confirmation is reported. The 2029 date is IBM’s stated target; the supplied material does not say DARPA has validated it.
When will the Stage C results be released?
The announcement does not provide a testing schedule or a date for public results. Those details remain unclear.
Source: rss
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