[NII]-BPT diagram. Contours show the distribution of galaxies in the local Universe from SDSS (DR7), showing the AGN sequence (right) and the star-forming sequence (left). The solid and dashed lines are the corresponding dividing lines from Kewley et al. (2001) and Kauffmann et al. (2003), respectively. The JADES broad-line AGNs presented in this paper are shown with golden circles, while blue diamonds show the values obtained by Übler et al. (2023) for an AGN at z = 5.5. Stars show predictions by AGN photoionisation models from Nakajima & Maiolino (2022) colour-coded by metallicity.