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A dated, source-bounded reading of the original report.
Selection does not establish a successful useful application, completed fault-tolerant system or technical winner.
Published testing outcomes, changed engineering assumptions or a subsequent programme-status decision.
Suggest a correction or new source →Initial source-bounded record. No automatic change to the QRank score edition.
DARPA is testing roadmaps, not declaring winners Reported: DARPA selected Atom Computing, Diraq, IBM and IonQ for QBI Stage C on October 7. Supported observation: Stage C moves the four approaches into government verification and validation. Microsoft and PsiQuantum had already entered through the precursor programme. Conditions: The status concerns a proposed route to utility scale. Company releases are interpretations of the same programme event, not additional independent tests. Not established: Selection does not establish a successful useful application, completed fault-tolerant system or technical winner. Next evidence: Published testing outcomes, changed engineering assumptions or a subsequent programme-status decision. Four more teams enter QBI’s final stage · Government programme announcement · 2026-10-07 https://www.darpa.mil/news/2026/four-more-teams-enter-quantum-benchmarking-initiative-final-stage Source checked 2026-10-08 Source family: qbi-stage-c-2026-10-07. Programme status originator IBM advances to QBI Stage C · Company announcement · 2026-10-07 https://newsroom.ibm.com/2026-10-07-ibm-advances-to-stage-c-of-darpa-quantum-benchmarking-initiative Source checked 2026-10-08 Source family: qbi-stage-c-2026-10-07. Participating company interpretation IonQ advances to the final QBI stage · Issuer announcement · 2026-10-07 https://investors.ionq.com/news/news-details/2026/IonQ-Advances-to-Final-Stage-of-DARPAs-Quantum-Benchmarking-Initiative/default.aspx Source checked 2026-10-08 Source family: qbi-stage-c-2026-10-07. Participating company funding disclosure Revision: claim-qbi-stage-c-selection-2026-10-07-r1 · 2026-10-08 Review: Source and editorial check. Primary-source wording and scope review; no independent scientific reproduction. Independent replication: not assessed. Cited revision: https://qubitwire.com/evidence/qbi-stage-c-selection-2026-10-07?revision=claim-qbi-stage-c-selection-2026-10-07-r1 Current corrections: https://qubitwire.com/evidence/qbi-stage-c-selection-2026-10-07