Jan

Jan is an open source app that runs AI models on your own computer. It is presented as an alternative to ChatGPT that can also connect to cloud models when you want them.

Jan gives you a chat window for open models that run on your machine. You can download and switch between models, and you can also connect cloud models from providers such as OpenAI and Anthropic. The app is designed to be simple to set up, with a desktop interface rather than a command line.

• Run open-source models locally on your computer
• Connect to cloud models such as GPT and Claude
• Chat through a simple desktop interface
• Download and switch between many open models
• Keep conversations on your own device

Jan suits people who want a private chat tool and do not want to rely on a web service. It is also a fit for developers who want a local front end to test models.

Jan is free and open source. Local models need enough memory and processing power to run smoothly, and larger models need more of both. Cloud models are billed by their own providers, so you will need your own account for those.