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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchDARPA has advanced Atom Computing, Diraq, IBM and IonQ to Stage C, the final stage of its Quantum Benchmarking Initiative (QBI). The milestone puts their proposed quantum-computing systems into government verification and validation; it does not mean DARPA has named winners or that any company has already built a computer with industrially useful performance.
Which four companies advanced?
DARPA announced the four new Stage C participants on October 7, 2026. The agency describes their approaches as follows:
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| Company | Approach named by DARPA |
|---|---|
| Atom Computing | Scalable arrays of neutral atoms |
| Diraq | Silicon CMOS spin qubits |
| IBM | Modular superconducting processors |
| IonQ | Trapped-ion quantum computing |
These are different physical platforms and architectures, not a performance ranking. DARPA’s announcement does not provide matched measurements that would establish which approach is faster, cheaper, more scalable or closer to practical use. DARPA’s announcement names the platforms; its QBI program page provides the broader participant list.
What does Stage C involve?
Stage C is the program’s verification-and-validation phase. DARPA says Stage B lasted a year and examined participants’ detailed research and development plans, technical risks, risk-mitigation strategies and prototypes intended to show progress. In Stage C, a government evaluation team works alongside the companies to assess whether their proposed utility-scale systems can be built as designed and operated as intended.
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In DARPA’s framing, this is a move from reviewing plans toward scrutinizing hardware and systems as they develop. Advancement means a participant has entered that evaluation phase; it is not a finding that the system has passed verification or met the program’s ultimate goal.
What is QBI trying to establish?
DARPA defines utility-scale operation as a quantum computer whose computational value exceeds its cost. QBI is intended to determine whether any quantum-computing approach can reach that point by 2033. The year is a program target for assessing whether an approach can achieve utility-scale operation, not a demonstrated result or guarantee.
DARPA says the initiative has evaluated over 20 organizations since launching in mid-2024. Its program page lists potential award ceilings of up to $1 million for Stage A, up to $15 million for Stage B and up to $300 million for Stage C. These are stage ceilings, not confirmation that each newly advanced company received the maximum.
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DARPA’s participant list, marked current as of October 8, 2026, includes six Stage C participants. Microsoft and PsiQuantum reached the stage through the US2QC pilot precursor; the October 7 announcement added Atom Computing, Diraq, IBM and IonQ.
| Participant | Architecture listed by DARPA |
|---|---|
| Atom Computing | Neutral-atom arrays |
| Diraq | Silicon CMOS spin qubits |
| IBM | Modular superconducting processors |
| IonQ | Trapped-ion qubits |
| Microsoft | Compact superconducting topological-qubit architecture |
| PsiQuantum | Silicon-based photonics |
The list reflects DARPA’s status on October 8, 2026, and the agency says it updates the active-participant list periodically.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Does advancing mean there is a winner?
No. DARPA says QBI is not intended to pick winners and losers; it evaluates each approach on its merits. The agency says the program may ultimately find that multiple participants, one participant or none demonstrates a path to industrial usefulness.
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DARPA also estimates that, on balance, it is more likely than not that at least one company will create an industrially useful quantum computer by 2033. That is the agency’s expectation, not an established outcome. IBM separately characterized its advancement as validating the strength of its path to a fault-tolerant quantum computer; that is IBM’s statement about its own progress, not an independent DARPA finding. IBM’s expectation to deliver its first fault-tolerant system in 2029 is likewise a company-stated expectation, not a DARPA schedule or verified result. IBM’s announcement provides its characterization and timeline.
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