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GPT Engineer
The open-source CLI that generates code from a prompt; its web app became Lovable.
gptengineer.app now redirects to lovable.dev; the open-source CLI remains on GitHub.
what it is
GPT Engineer started as an open-source command-line tool: you write what you want in a prompt file and it generates the code. The hosted web app at gptengineer.app now redirects to Lovable. The CLI is still on GitHub.
who it's for
Developers experimenting with prompt-to-code generation; non-developers should look at Lovable.
how to start
- 1Install: python -m pip install gpt-engineer
- 2Create a project folder with a file called prompt containing your instructions.
- 3Run: gpte <project_dir>
- 4Or use Lovable at lovable.dev for the hosted experience.
what you need
- Python
- An LLM API key
pricing
Free and open source
You pay your model provider for any API usage
checked Oct 10, 2026
key features
- Prompt-to-code generation
- Ask for improvements to existing code
- Open source