Jan
A free desktop AI chat app for Windows, macOS and Linux that runs models locally or connects to GPT, Claude and other cloud models.
Jan gives people a ChatGPT-style chat interface for AI models running on their own computer. It's free and available for Windows, macOS and Linux. Local chats work offline, with the model and conversation kept on your machine. You can also use cloud models when you want access to a hosted provider.
For local use, Jan can download models from Hugging Face, including Llama, Gemma, Qwen and GPT-oss. It supports GPU use on Apple Silicon Macs and Windows systems with NVIDIA, AMD or Intel Arc graphics; GPU acceleration is also available on Linux. Model size affects memory needs, so the hardware you have will shape which local models are practical.
The same chat app can connect to OpenAI's GPT, Anthropic's Claude, Gemini and Mistral. Requests to those hosted models go to their providers and need an internet connection. Jan also lets you create custom assistants for particular tasks. Its OpenAI-compatible local API lets other applications use models running through Jan, while MCP support connects the app to tools for agent tasks.
