New result for the Hubble tension from TDCOSMO using JWST. From three time-delay lenses, they find H0= 73.5 ± 2.8 km/s/Mpc, assuming the internal mass-sheet parameter λ_int = 1.

With new JWST imaging and spectroscopy, improved lens-environment estimates, and substantially revised modeling, the result is almost identical to the previous HST-based result for the same three lenses under the same λ_int = 1 assumption, H0 = 73.6 ± 2.6, while the scatter between the individual lenses is reduced. One caveat is the assumption λ_int =1, which will be treated as a free parameter in the forthcoming TDCOSMO-2026 analysis. However, existing TDCOSMO constraints put λ_int close to unity (or slightly above), with no empirical indication that freeing it should necessarily pull H0 toward the Planck value.

Another independent measurement, again landing on the high-H0 side.
arXiv:2608.27566