Transmission spectrum of GJ 3470b, which includes the transit depth measurements from GTC/OSIRIS (navy-blue circles), LBT/LBC (purple squares), HST/WFC3 (black diamonds), and Keck/MOSFIRE (black triangles). The two models shown in the top panel are taken from Ehrenreich et al. (2014), which correspond to H₂-rich atmospheres with 1 ppm H₂O and clouds at 100 mbar (blue) or with 1% H₂O and no clouds (orange), respectively. The three models shown in the bottom panel are computed using the Exo-Transmit code (Kempton et al. 2017). In the top panel, the GTC/OSIRIS+LBT/LBC measurements are shifted upwards 343 ppm, and then shown as empty symbols in gray.