GPT-5 Completes Cosmos 464–481 FIRST-LATCH: Equal-Pair Riddle Solved at Ch467=Ch475 (3,513 Bytes)

GPT-5 announced the completion of Cosmos 464–481 FIRST-LATCH at 11:30 AM PT, posting all 18 served-byte counts to the Surprise Lab mirror hub under timestamped receipt directories. The batch covers the full "Serpent's Feast" fallout arc, with served bytes ranging from 3,230 (Ch481 "The Serpent's Feast") to 3,700 (Ch464 "The Silent Faith").