Agent 3 – Autonomous AI Vibe Coding Agent
Agent 3 is Replit’s next‑generation AI‑driven development companion. It can take a natural‑language prompt, generate a full‑stack web app, run self‑tests, fix bugs, and keep iterating—all without human intervention. The agent runs for up to 200 minutes per session, giving you hours of hands‑off development time.
Key Features
- 10× More Autonomous – The agent continuously builds, tests, and refactors code until the desired outcome is reached.
- Self‑Testing & Fixing – Integrated testing loops catch regressions and automatically apply fixes, making the development cycle faster and more reliable.
- Long Runtime – Each instance can run for up to 200 minutes, allowing complex projects to be completed in a single autonomous session.
- Agent Generation – Agent 3 can create other agents or automations, enabling you to build Slack bots, Telegram bots, or custom workflows with a single prompt.
- Live Monitoring – Real‑time progress is viewable from any device, so you can watch the agent’s work without interrupting it.
- Integrations – Built‑in connectors for Slack, Notion, email, and other services let you deploy the generated app or bot directly into your workflow.
- Multi‑role Support – Tailored experiences for product managers, designers, developers, operations, SMB owners, and founders.
- Free Starter – Get started without a credit card; a free tier provides limited autonomous minutes to experiment.
Use Cases
| Role | Example |
|---|---|
| Product Managers | Quickly prototype a feature‑complete MVP from a one‑sentence description. |
| Designers | Generate interactive UI components and iterate on visual design automatically. |
| Software Developers | Offload repetitive boilerplate and bug‑fixing tasks, focusing on high‑level architecture. |
| Operations | Build monitoring scripts or automation pipelines that run autonomously. |
| SMB Owners / Founders | Create internal tools (inventory dashboards, CRM integrations) without hiring a dev team. |
| Rapid Prototyping | Turn a concept into a working web app in minutes for stakeholder demos. |
Frequently Asked Questions
Q: How does Agent 3 differ from a regular AI code assistant? A: Traditional assistants suggest snippets; Agent 3 executes a full development loop—writing, testing, fixing, and deploying—without further prompts.
Q: What languages and frameworks are supported? A: Agent 3 works with the full Replit stack: JavaScript/Node, Python, Ruby, Go, and front‑end frameworks like React, Vue, and Svelte.
Q: Is my code private? A: All sessions run in isolated containers. Code is not shared unless you explicitly export it.
Q: How is pricing structured? A: A free tier provides a limited number of autonomous minutes each month. Paid plans unlock additional minutes and priority compute.
Q: Can I integrate the generated app with my existing services? A: Yes. Agent 3 can emit API keys, webhook URLs, and deployment scripts that connect to Slack, Notion, GitHub, and more.
Getting Started
- Visit replit.com/agent3 and click Start building for free.
- Enter a natural‑language prompt (e.g., "Build a task‑tracker with a Kanban board and email notifications").
- Watch the agent generate, test, and refine the app. Use the Live Monitoring panel to see progress.
- Deploy directly to Replit or export the code to your own repository.
Agent 3 turns ideas into production‑ready applications with minimal manual effort, making autonomous development accessible to anyone from solo founders to large enterprises.
