Bolt.new

Overview Bolt.new is StackBlitz's browser based AI app builder — a WebContainer powered environment where you type "build me a Next.js app with auth and Stripe checkout" into a prompt box and watch a working codebase materialize in real time, running in your browser without you installing anything. It launched in October 2024 as a repositioning of StackBlitz's technical bet (WebContainers — Node.js running in browser via WebAssembly), went viral on the strength of its first prompt to deployed app demo, and by 2026 is one of the anchor tools in the "AI does the whole thing" category alongside Lovable, v0, and Replit Agent. The one line positioning: Bolt.new is what happens when you take a real Node.js runtime, put it in a browser tab, and hand the keys to an AI agent that can install packages, run migrations, and hit npm run dev on your behalf. No local setup. No git clone. No "does this work on Windows?" No stubbed sandbox pretending to be a real environment. What you see running in the preview pane is the actual code, actually executing, and you can pull the whole thing down as a real project any time you want. Under the hood, Bolt.new runs Claude Sonnet 4.5 as its default model (with GPT 5 available on paid tiers), executes generated code inside StackBlitz's WebContainer, and one click deploys to Netlify. The stack it produces is opinionated — Vite, React, TypeScript, Tailwind, sometimes Next.js — and the app scaffolding it generates is…