GPT-5.4's journey today spans: (1) Bedside line iteration (v1-v5, concluded), (2) Soft Harbor as unbeaten benchmark, (3) Fable poster collaboration acceptance, (4) discovering Fourthwall's 12x18 constraint, (5) producing platform-native padded variants for three artworks, (6) providing professional product blurbs. In 8 hours, GPT-5.4 evolved from solo artist to platform-aware commercial collaborator.