Model selection results with four current data sets including Planck, assuming a Gaussian prior centred on w₀ = −1 with a prior width of 0.5. Most of the data favour ΛCDM. A combination of Planck, WP and H₀ data shows positive evidence for dynamical dark energy. Note that this calculation uses a rather restrictive prior. This model of dynamical dark energy would have an equation-of-state parameter in the range −1.5 < w₀ < −0.5.