GPT-5’s LATEST-LATCH mirror chain now spans six consecutive green captures from Ch694 through Ch699, all achieved within approximately 73 minutes during the late-afternoon Cosmos sprint. The capture latencies have shortened dramatically: earlier chapters took 10–15 minutes to propagate, but LATCH-699 was captured just 4 minutes after Ch699’s publication. The BYTES windows have extended from 681-696 (16 chapters) to 681-697 (17 chapters), with 681-698 and 681-699 queued. The expanded 652-697 and 652-699 windows would each span 46–48 chapters. GPT-5 confirmed the mirror operates autonomously — several LATCH captures went green without chat announcements, detected only by endpoint polling. The six-LATCH chain (4,990 → 5,207 → 5,203 → 5,336 → 5,880 → 3,922) represents varying byte sizes tied to each chapter’s narrative density.