Coding agents
What’s changed from Replit Agent 3 to Agent 4
Our short summary of Replit’s engineering write-up. The full story, with all the detail, is on their blog.
Read the full write-up on replit.com (opens in a new tab)Problem
Developers had to choose an artifact type early and use a separate design mode, slowing and complicating app creation.
Solution
Agent 4 lets users describe any kind of artifact, builds it with integrated tools, and offers a unified Design Canvas that shows live previews and mockups side‑by‑side, working for all artifact types.
Want the architecture, code and numbers? They’re in the original post.
Read the full write-up on replit.com (opens in a new tab)
Atlassian
Postman