Replit Goes Free, Agents Get Wallets, and Lenny Tests the New Coding Tools

Three signals worth sitting with today: Replit just made AI-powered software creation free (powered by GPT-5.6 Luna), which rewrites the onboarding story for vibe coding at scale. AWS AgentCore Payments went GA, which means autonomous agent spending is now a production infrastructure concern, not a research one. And Lenny published a head-to-head on Grok Bot, Grok 4.6, and Cursor Origin that's the most practitioner-grounded model comparison I've seen this week.