Jan

Open-source desktop ChatGPT alternative that runs models fully offline

★ Stars45k45,010 on GitHub
Last commit19 Oct 2026
LicenceApache-2.0Per the project
View on GitHub ↗

From GitHub, fetched 19 Oct 2026.

Jan is a desktop app for Windows, macOS and Linux that downloads and runs open models on your own computer, with an optional local OpenAI-compatible API server. It can also connect to cloud models when you want them.

A desktop app rather than a server you host for others; its local API server can be used by other apps on the same machine or network.

Self-hosted alternative to

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