Relation of the MBH mass and stellar mass at redshift z = 3, 4, 5, and 6. The darker green regions represent our results when restricting to MBHs with luminosity larger than 10¹¹ L_⊙, in order to mimic selection effects at high redshift. For z = 4, 5 and 6, we show JWST observations in the redshift range z = 4 to 7 (Maiolino et al. 2024; Übler et al. 2023; Harikane et al. 2023; Li et al. 2025a), some of which were used to obtain the fit of Pacucci et al. (2023) (light orange, excluding the more recent data of Li et al. 2025a). For comparison, we also show the fit to the observed local relation (light blue) of Greene et al. (2020).