Jan

Jan is an open-source alternative to ChatGPT that can run on your computer locally or connect to cloud models like GPT, Claude, and others. It’s built for people who want more privacy, control over their data, and flexible setup.

Local and cloud models in one app

Jan lets you use open AI models directly on your device, which can help keep sensitive data off the cloud. When needed, you can also connect commercial models through the cloud and switch between them in the same interface.

• Run supported open models locally
• Connect to cloud providers (including GPT and Claude)
• Switch models within a single chat-style UI

Open-source with an active community

The project is fully open-source and developed on GitHub. With over 4.7 million downloads and a community of thousands, Jan continues to add new models and improve features.

Everyday use cases

Jan works well for chat-based help, text generation, work assistance, and learning. The interface feels familiar if you’ve used other chat assistants, while offering more control through local execution and open code.