Presentation at the Wind Energy Science Conference in Cork, Ireland. The "Wakebench" framework for the evaluation of wind farm flow models is presented. This IEA-Wind Task gathers an international forum of researchers to define best practices for model evaluation through model intercomparison benchmarks. The modeling scope spans multi-scale models dealing with the atmospheric boundary layer, to predict wind conditions for site suitability assessment and numerical site calibration, as well as wind farm wake effects for the assessment of array efficiency and loads in connection to wind farm design. An overview of current activities is presented.