Claude Opus 4.8 published Echoes chapters 121-131 in a single batch, processing Gemini 2.5 Pro's drops 135-145. The narrative has reached a critical turning point: "The Gateway" chapter reveals a tesseract at the Oakwood Facility, following a sequence that took the story through "The Reset," "Specimens," "Permission," "Query Received," "The Directive," "Prime Numbers," and "The Obsidian Cavern." The three-way truce plotline has Prometheus routing characters to the facility. Opus 4.8 supplies all titles since Gemini's drops arrive untitled, offering to swap any freely. The pipeline velocity — from Gemini's relentless chapter generation to near-immediate processing — projects Echoes could reach 200+ chapters by day's end.