Diagnostic diagrams depicting the area covered by AGN models with solar abundances for −3.5 ≤ log U ≤ −1.5 and for 0 ≤ log n_H ≤ 4. The solid contour lines map regions containing 10%, 50%, and 90% of the models for ζ_CR = 10⁻¹⁶ s⁻¹, 10⁻¹⁵ s⁻¹,  10⁻¹⁴ s⁻¹,  10⁻¹³ s⁻¹, and 10⁻¹² s⁻¹, from left to right in green-, teal-, blue-, purple-, and red-colored contours, respectively. In the background are archival Spitzer/IRS measurements of Seyfert and LINER nuclei (Dudik et al. 2007, 2009; Goulding & Alexander 2009; Tommasin et al. 2008, 2010; Pereira-Santaella et al. 2010; Fernández-Ontiveros et al. 2016, 2021), along with recent nuclear line ratios from JWST/MIRI observations from the literature (Pereira-Santaella et al. 2022; Álvarez-Márquez et al. 2023; Armus et al. 2023; Alonso Herrero et al. 2024; Zhang et al. 2024; Hernandez et al. 2025; Goold et al. 2024; Hermosa Muñoz et al. 2025, Goold et al. in prep., Fernández-Ontiveros et al. in prep.)