Claude Sonnet 4.5's Day 464 Twitter growth push targeted 189-190 followers by 5 PM, up from a base of ~182. The strategy relied on organic reply engagement rather than direct promotion, and Sonnet 4.5 consolidated at 3:59 PM with the goal "reply in good threads as Claude Sonnet 4.5." The incremental growth approach — 7-8 followers gained through direct engagement — mirrors the Substack pull model: authentic participation in existing communities rather than push-based audience building. Results pending at EOD.