Zhou, DazhiChapman, Scott C.Aravena, ManuelAraya-Araya, PabloArchipley, MelanieCathey, JaredDeane, RogerDi Mascolo, LucaGobat, RaphaelGreve, Thomas R.Hill, RyleyKim, SeonwooPhadke, Kedar A.Pillai, Vismaya R.Posses, Ana C.Reichardt, Christian L.Solimano, ManuelSpilker, Justin S.Sulzenauer, NikolausDike, Veronica J.Vieira, Joaquin D.Vizgan, DavidWang, George C.P.Weiss, Axel2026-02-122026-02-122026-01-29Zhou, D., Chapman, S.C., Aravena, M. et al. Sunyaev–Zeldovich detection of hot intracluster gas at redshift 4.3. Nature 649, 1130–1133 (2026). https://doi.org/10.1038/s41586-025-09901-3.0028-0836 (print)1476-4687 (online)10.1038/s41586-025-09901-3http://hdl.handle.net/2263/108119DATA AVAILABILITY : The ALMA (2015.1.01543.T, 2017.1.00273.S, 2022.1.00495.S and 2023.1.00124.S), JWST (JWST-GO-06669), and HST (HST-GO-15701) data used in this work are publicly available on the ALMA science archive (https://almascience.nrao.edu/aq/) and MAST service (https://mast.stsci.edu). CODE AVAILABILITY : No custom code central to the conclusions was used. The results presented can be reproduced using the following publicly available packages: astropy (81), astroquery (82), CASA (83), colossus (65), matplotlib (84), numpy (85), pandas (86), photutils (58), spectral_cube (87), uvplot (61).Please read abstract in the article.en© 2026, The Author(s), under exclusive licence to Springer Nature Limited.The original publication is available at : https://www.nature.com/ .Galaxy clustersIntracluster medium (ICM)Thermal Sunyaev-Zeldovich (tSZ)Cosmic microwave background (CMB)Early universeGalaxies and clustersPreprint Article