Jan
Chat with local language models or a configured cloud provider from a desktop app with a local API.
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About this product
Jan is a desktop app for running and comparing language models on your own machine. It can download compatible local models, keep your chats on the device when you use a local model, and connect to cloud providers if you configure them. The app is available for macOS, Windows, and Linux. Current local model support on macOS requires Apple Silicon.
Its local OpenAI-compatible API lets a developer point an existing client at Jan and try the same task with a local model. Model size and context length affect memory use and response speed. Cloud providers and external integrations have their own data flows, so check which model and tools are active before sending sensitive text.
Start with a small local model and one representative task, such as turning a meeting excerpt into action items. Repeat it with a longer excerpt and check both speed and whether the model preserves names, owners, and deadlines. If you intend to use the API, repeat the same prompt through your client and verify the endpoint is local.
Features
- Local model chat
- macOS, Windows, and Linux
- Optional cloud providers
- Local OpenAI-compatible API
- MCP integrations
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