Replit Agent 4

Amjad Masad built Replit—the browser-based IDE that let millions of people write code without installing anything. Now he's back with Agent 4, and this time he's not just building a coding tool. He's building an AI that takes you from "I have an idea" to "it's live" in a single conversation. Rohan Chaubey is listed as a key person on this release, and together they've positioned Agent 4 as something different from every other AI coding assistant on the market. It's built for creativity, not just completion.

The pitch is simple: build, design, and ship anything AI fast in one flow. No context switching. No stitching together separate tools. You tell it what you want, it figures out the code, the UI, the database, the deployment. That's the idea anyway. Replit has been at this since 2016, they've got millions of developers on the platform, and this is their fourth swing at the AI agent thing. They know what works and what doesn't.

The devtools space is crowded. Cursor, v0, Windsurf, everyone's fighting for the same developers. What separates Replit Agent 4 is the "one flow" promise—the idea that you never leave the platform from idea to production. Whether they actually delivered on that vision is the question. But Amjad's been in this game long enough to know when something's ready. Let's see what developers actually build with it.