Confidence contours (68/95%) and posterior distributions for the Ω_m, σ₈, γ, and ∑m_ν parameters, using the D16 mass function and M_vir cluster mass definition. Results are obtained from the combination of CMB, clusters, BAO, and Lyman-α data. We fix A_T − M to either the Planck cluster calibration value (blue) or its preferred value when left free (red, see Sect. 4.4 for details). We also show in grey the posteriors in the standard gravity case with no cluster data. The grey vertical dashed line corresponds to the standard γ value of ∼0.545.