Replit Ships Agent 4, Its Most Capable Coding Agent Yet

Replit officially introduced Agent 4, the latest version of its autonomous coding agent, with Replit framing it less as "a tool that writes code" and more as a creative collaborator that can plan, build, and iterate on a project with less hand-holding than earlier versions needed.

The company has published a detailed changelog of what's different from Agent 3, and early coverage has focused on it handling longer, more open-ended tasks without losing track of the original goal — historically one of the harder problems for autonomous coding agents to solve well.

For anyone building on Replit, it's worth revisiting a project you gave up steering a few months ago; agent capability in this space is moving fast enough that a task that felt frustrating with an older agent version may go noticeably smoother now.