Posterior distribution of H₀ and Ω_k in open ΛCDM cosmology. The black contours show the constraints from TDCOSMO alone, including the TDCOSMO-2025, SLACS, and SL2S lensing datasets. The gray contours show the constraints from Planck. The orange contours correspond to the combination of Planck and TDCOSMO. The two datasets exhibit a tension exceeding 3σ, indicating that this joint constraint should be interpreted with caution. The contour levels represent the 1σ and 2σ constraints.