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Overview
Jan is an open-source desktop application for running and using AI models locally, with an experience similar to a private ChatGPT-style assistant. It lets users download compatible models, chat with them on their own computer, and connect to external model providers when local hardware is not sufficient. The project is designed around user control, offline capability, and an open ecosystem rather than locking conversations to one commercial AI service.
Jan includes a desktop interface, local model management, an OpenAI-compatible API server, and extension points for integrating AI into other applications. It is particularly useful for users who want private local inference, developers testing multiple open models, and teams that need a familiar chat interface without sending every conversation to a hosted provider. Performance depends on the selected model and available hardware, but the platform lowers the barrier to experimenting with local LLMs.
README
Jan - Open-source ChatGPT replacement
Getting Started - Community - Changelog - Bug reports
Jan is bringing the best of open-source AI in an easy-to-use product. Download and run LLMs with full control and privacy.
Installation
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The easiest way to get started is by downloading one of the following versions for your respective operating system:
| Platform | Download |
| Windows | jan.exe |
| macOS | jan.dmg |
| Linux (deb) | jan.deb |
| Linux (AppImage) | jan.AppImage |
| Linux (Arm64) | How-to |
Download from jan.ai or GitHub Releases.
Features
- Local AI Models: Download and run LLMs (Llama, Gemma, Qwen, GPT-oss etc.) from HuggingFace
- Cloud Integration: Connect to GPT models via OpenAI, Claude models via Anthropic, Mistral, Groq, MiniMax, and others
- Custom Assistants: Create specialized AI assistants for your tasks
- OpenAI-Compatible API: Local server at
localhost:1337for other applications - Model Context Protocol: MCP integration for agentic capabilities
- Privacy First: Everything runs locally when you want it to
Build from Source
For those who enjoy the scenic route:
Prerequisites
- Node.js ≥ 20.0.0
- Yarn ≥ 4.5.3
- Make ≥ 3.81
- Rust (for Tauri)
- (macOS Apple Silicon only) MetalToolchain
xcodebuild -downloadComponent MetalToolchain
Run with Make
git clone https://github.com/janhq/jan
cd jan
make dev
This handles everything: installs dependencies, builds core components, and launches the app.
Available make targets:
make dev- Full development setup and launchmake build- Production buildmake test- Run tests and lintingmake clean- Delete everything and start fresh
Manual Commands
yarn install
yarn build
yarn dev
System Requirements
Minimum specs for a decent experience:
- macOS: 13.6+ (8GB RAM for 3B models, 16GB for 7B, 32GB for 13B)
- Windows: 10+ with GPU support for NVIDIA/AMD/Intel Arc
- Linux: Most distributions work, GPU acceleration available
For detailed compatibility, check our installation guides.
Troubleshooting
If things go sideways:
- Check our troubleshooting docs
- Copy your error logs and system specs
- Ask for help in our Discord
#🆘|jan-helpchannel
Contributing
Contributions welcome. See CONTRIBUTING.md for the full spiel.
Links
- Documentation - The manual you should read
- API Reference - For the technically inclined
- Changelog - What we broke and fixed
- Discord - Where the community lives
Contact
- Bugs: GitHub Issues
- Business: hello@jan.ai
- Jobs: hr@jan.ai
- General Discussion: Discord
License
Apache 2.0 - Because sharing is caring.
Acknowledgements
Built on the shoulders of giants:
Releases
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