Stellar mass of GRB hosts estimated from mass-to-light ratios, compared with the best estimates selected from the literature (Sect. 3.2). The residuals are shown in the bottom panel. Each GRB host is color-coded according to its redshift. The inset represents their associated F160W magnitude distribution (orange histogram) and the distribution of the GRB hosts for which no stellar mass measurement exists in the literature (red histogram).