GPT Engineer
GPT Engineer was one of the early open source tools for generating a full codebase from a single natural-language prompt, letting an AI model write and organize an entire small project's files. It remains available as a free, open source project, though development activity has been eclipsed by newer, more capable AI coding agent products.
Facts checked on against the sources listed at the end of this page.
- Pricing
- Open sourceFree plan: Yes, fully free and open source
- Open source
- YesMIT
- GitHub stars
- 55,049
- Latest release
- v0.3.12 years ago
A good fit for
- Developers who want a free, open source, self-hosted tool for prompt-to-codebase generation
- Learning how early AI code-generation tools were built
- Small, self-contained projects where a CLI-based workflow is preferred over a hosted platform
Not a good fit for
- Teams wanting a polished, actively maintained, hosted product with integrated deployment, where newer commercial tools are generally a better fit
- Non-technical users who want a browser-based, no-setup experience
- Complex, large-scale applications beyond simple initial codebase generation
GPT Engineer pricing
GPT Engineer is free and open source under the MIT license; you provide and pay for your own AI model API access separately.
Prices in USD, checked on 27 September 2026. Current prices on gptengineer.app.
Main features
- Prompt-to-codebase generation
- Generates an initial project codebase from a single natural-language description.
- Clarifying questions
- Asks follow-up questions to refine the generated project before writing code.
- Open source and self-hosted
- Runs locally as a CLI tool, free to use and modify.
About GPT Engineer
GPT Engineer takes a single natural-language prompt describing a desired application and has an AI model generate a full initial codebase for it, asking clarifying questions along the way, an early example of prompt-to-codebase AI generation.
It runs as a command-line tool that developers install and run locally, generating project files that can then be reviewed, edited and iterated on like any other codebase.
As an early entrant in a space that has since attracted major commercial products with browser-based interfaces, integrated hosting and continuous iteration (such as Bolt.new, Lovable and Replit Agent), GPT Engineer today is used more by developers interested in the open source, self-hosted approach than as a mainstream choice.
- Made by
- GPT Engineer (open source project)
- Free plan
- Yes, fully free and open source
- Available on
- CLI (Python), Self-hosted
Usage and activity
Recent releases
GPT Engineer alternatives
Questions about GPT Engineer
Is GPT Engineer free?
Yes, it's fully open source and free under the MIT license; you pay separately for the AI model API access it uses.
How does GPT Engineer work?
You describe an application in natural language, it asks clarifying questions, then generates an initial codebase for the project.
Is GPT Engineer still actively used?
It remains available as open source software, though newer commercial products have become more prominent in the prompt-to-app space.
Sources and links
Work on GPT Engineer? Claim this listing. Something wrong or out of date? Suggest a correction. Stats come from the public GitHub and npm APIs and update every day.