A free AI code generator that runs the code it writes. Describe what you want. The agent writes it across your files, runs it and fixes what fails.
Free, without a card
Free costs nothing and needs no card: the agent in your terminal, your editor and the Mac app, the free models, and your own API keys and local models (Ollama, LM Studio) with no limits from us.
Whole features, not snippets
The agent reads your project first, then writes the code where it belongs, across as many files as the change needs. It runs your commands and your tests as it goes, so what it hands back has already run.
Whatever your project is written in
It works in your repository with your own toolchain: the package manager, the build and the test runner your project already uses. You read one diff at the end.
Your code stays on your machine
The agent runs on your machine, and your code stays there: only what a request needs goes to the model you choose. MegaBrain does not train AI models on your code.
Questions
Is there a free AI code generator?+
Yes. Free costs nothing and needs no card: the agent in your terminal, your editor and the Mac app, the free models, and your own API keys and local models (Ollama, LM Studio) with no limits from us.
Do I need an API key?+
No. Sign in once and the free models work without one. If you have keys for OpenAI, Anthropic, Google or another provider, add them and use them at no cost from us.
Which models write the code?+
90+ models through one plan: the free models on Free, included models such as GLM, Kimi and MiniMax on the paid plans, Claude, GPT and Gemini from Pro, and any local model. Auto picks one for each task.
Does it work in the browser?+
No. MegaBrain runs on your computer, in your terminal or as a Mac app, so it can run your code and your tests where they already work.
How do I start?+
Install the CLI with npm install -g @getmegabrain/cli, run megabrain in your project and sign in once. Or download MegaBrain for Mac (macOS 13 or later on Apple silicon (M1 or newer)).
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Cursor Alternative with a Free Plan
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