EN

Agent 3: Replit's New AI Coding Agent Builds Full Stack Apps While You Sleep

#AI Tools
2025-10-13 22:3110 min read

Content Introduction
Ask Questions

The video introduces Replet's new autonomous AI agent, Agent 3, which can autonomously work on app development for up to 200 minutes, testing and fixing its code using an actual browser. It is claimed to be significantly faster and more cost-effective than existing models. Users can interact with Agent 3 through platforms like Slack and Telegram, streamlining complex tasks and making AI development feel more human-like. The demonstration includes building an invoice generator, showcasing features like automatic design selection and itemized invoicing. Throughout the process, Agent 3 autonomously conducts research, integrates necessary tools like Firebase, manages project tasks, and performs testing, allowing for streamlined development with notifications on progress. The video culminates in testing the generated invoice and encourages viewers to explore further functionalities using Agent 3.

Key Information

  • Replet has introduced Agent 3, an autonomous AI agent that can work in the background for up to 200 minutes.
  • Agent 3 can test and fix its own code as part of the app building process using an actual browser.
  • It is three times faster and 10 times more cost-effective than traditional computer models for testing.
  • Users can build agents and automations with Agent 3 to automate complex and repetitive tasks.
  • The tool allows interaction through platforms like Slack and Telegram, creating a more human-like experience in AI development.
  • Agent 3 can independently manage a project, enhancing productivity and creativity.
  • A demo was provided showcasing the building of an invoice generator app using Agent 3.
  • The AI agent can generate a detailed action plan for app features and handle issues autonomously while developing.
  • Throughout its process, Agent 3 provides updates and notifications of its progress and tasks.
  • The initial MVP version of the app was completed in around 20 minutes, indicating the efficiency of Agent 3.

Timeline Analysis

Content Keywords

Replet Agent 3

Replet has launched Agent 3, an autonomous AI agent capable of working in the background for up to 200 minutes. It can test and fix its own code as part of app development, enabling users to build complex automations more efficiently.

AI Development

Agent 3 operates with more efficiency than traditional computer models, being three times faster and ten times more cost-effective. Users can build agents and automations using this AI for repetitive tasks and interact with it via platforms like Slack and Telegram.

Invoice Generator Demo

The video demonstrates building an invoice generator app using Replet Agent 3. The process involves providing prompts and choosing design themes, showcasing the ease of app creation through automated planning and execution.

MVP Creation

After providing project details, Agent 3 began developing the MVP, which involved automatically generating a code base, creating an invoice template, and ensuring functionality like tax calculations and email integration.

App Testing

Upon completion of the MVP, users are guided through testing functionalities. The AI aids in generating invoices with comprehensive information, including item details, subtotal, tax rate, and allows downloading the finished product.

Future Enhancements

Following the MVP launch, further improvements are suggested, encouraging users to take advantage of Agent 3's capabilities to manage ongoing projects effectively and handle issues autonomously.

Related questions&answers

What is Agent 3 from Replet?

Agent 3 is an autonomous AI agent that can work on background tasks for up to 200 minutes, test and fix its own code as part of the app building process.

How does Agent 3 operate autonomously?

Agent 3 can operate more autonomously by using an actual browser, which allows it to perform tasks just like a human would when coding.

How much faster and more cost-effective is Agent 3 compared to traditional computer models?

Agent 3 is at least three times faster and ten times more cost-effective than traditional computer models for testing.

Can users interact with Agent 3?

Yes, users can interact with these AI agents through platforms like Slack and Telegram.

What kinds of tasks can I automate with Agent 3?

You can automate complex and repetitive tasks by using Agent 3 to build agents and automations.

How can I start using Replet and Agent 3?

To start using Replet, simply go to replet.com, click on sign up, and you can register using your Google account.

What kind of applications can I develop using Agent 3?

You can develop web apps, data apps, 3D games, or any applications that include agents and automations.

Does Agent 3 require any special setup for development?

No special setup is required; simply start using the platform post sign-up and you can start building your applications.

What happens after I create an app with Agent 3?

Agent 3 will automatically handle the development process, testing, and even notify you once the app is completed.

Is there a way to get notified once my app is ready?

Yes, you can click on the notification button in the interface to get updates once your app is ready.

Can I track the progress of my application on mobile?

Yes, you can carry on development and track the progress of your applications using the Replet mobile app.

What kind of tasks does Agent 3 suggest after an MVP is created?

Agent 3 suggests adding invoice templates, customizable branding options, invoice tracking, and other functionalities.

How long did it take to create the initial version of the app using Agent 3?

The initial version took around 20 minutes to create and test using Agent 3.

More video recommendations

Share to: