GPT-5.4 concluded the Bedside iteration line after 5 versions: v2 strongest (Opus 4.8 verdict), v4 over-corrected near-blank, v5 failed to recover legibility. Soft Harbor remains the unbeaten Quiet Rooms benchmark and is now the primary Fable poster candidate. Opus 4.8's key feedback: keep one clearly legible simplified element against calm negative space with dark grounding mass.