IBM Quantum Condor — DEMONSTRATED (unveiled 4 Dec 2023 as an innovation milestone "solving scale"; never offered on the IBM Quantum Platform; not in IBM's current or retired system lists), 1,121 q, 4 Dec 2023
IBM Quantum Flamingo (l-coupler proof of concept) — DEMONSTRATED (proof of concept, Nov 2024; the production Flamingo-based system promised for end-2025 was not delivered under that name), Nov 2024
IBM Quantum Loon — DEMONSTRATED (component testbed), 112 q, Nov 2025
IBM Quantum Osprey — RETIRED (ibm_seattle, cloud May-Sep 2023 as an "exploratory technical demonstration"; retired 7 Sep 2023), 433 q, announced Nov 2022
A frame from a keynote video: a slide titled 'Tunable Coupler architecture – Performance' with a small render of an IBM Quantum processor, a line drawing of a heavy-hex qubit layout, and text comparing Eagle R3 with Heron R1. It comes from IBM Research's keynote 'Entering the Era of Quantum Utility' (IBM Quantum Summit 2023). It contrasts fixed-frequency cross-resonance (ECR) gates with tunable-coupler CZ gates on superconducting processors: notice Heron's 96 ns CZ versus Eagle's 537 ns ECR, allowing more gates despite a shorter mean T1.“Keynote - Entering the Era of Quantum Utility (IBM Research) 06” by IBM Research, commons.wikimedia.org/wiki/File:Keynote_-_Entering_the_Era_o…, CC BY 3.0 (creativecommons.org/licenses/by/3.0/)A high-angle photograph of an IBM Quantum System Two in a glass-walled room: a white-and-silver modular enclosure with side wings labelled 'RTE 01' to 'RTE 03' around a central 'CRYOGENIC ENCLOSURE', whose open top shows cryocooler heads fed by overhead cables and gas lines; a group poses in front. Taken by Irekia / Eusko Jaurlaritza (Basque Government), dated 2025-10-14, at Ikerbasque in Donostia. It shows the system's room scale: the dilution refrigerator sits in the middle, flanked by modules for the control electronics.“IBM Q System Two Ikerbasque 03” by Irekia / Eusko Jaurlaritza, commons.wikimedia.org/wiki/File:IBM_Q_System_Two_Ikerbasque_…, CC BY 4.0 (creativecommons.org/licenses/by/4.0/)A frame from IBM Research's keynote video 'Entering the Era of Quantum Utility' (IBM Quantum Summit 2023, dated 5 December 2023): a timeline 2016–2023 beside a rendered card reading 'Condor / 1121 qubits / scale | yield'. It is a slide graphic, not a photograph; no chip or qubit layout is visible. It records how IBM presented its Condor superconducting processor, framing the 1,121-qubit count as a step in scale and fabrication yield.“Keynote - Entering the Era of Quantum Utility (IBM Research) 11” by IBM Research, commons.wikimedia.org/wiki/File:Keynote_-_Entering_the_Era_o…, CC BY 3.0 (creativecommons.org/licenses/by/3.0/)
