# Jan

> Jan is a desktop chat app (Tauri, bundled llama.cpp engine) that downloads open models such as Llama, Gemma, Qwen and gpt-oss from Hugging Face and runs them offline, or connects to OpenAI, Anthropic, Mistral and Groq. It also serves a local OpenAI-compatible API on port 1337. Installers for Windows, macOS and Linux. Code is Apache-2.0; it ships no weights, so each model's licence matters. The README suggests 8GB RAM for 3B models, 16GB for 7B and 32GB for 13B on macOS.

- Repository: https://github.com/janhq/jan
- Official docs: https://jan.ai/docs
- Checked: 2026-10-15

## What it replaces
- ChatGPT Plus: Chat assistant (partial). Replaces the chat interface; answer quality depends on the model you run. Local models are generally less capable than paid frontier models.

## Facts, with sources

| Question | Status | Answer | Source | Checked |
|---|---|---|---|---|
| Runs on my machine? | Confirmed | Yes, desktop app running models offline | https://github.com/janhq/jan#readme | 2026-10-15 |
| Code licence | Confirmed | Apache-2.0 (attribution requested) | https://github.com/janhq/jan/blob/main/LICENSE | 2026-10-15 |
| Model weights licence | Confirmed | No bundled weights; licence depends on the model you download | https://github.com/janhq/jan#features | 2026-10-15 |
| Commercial use | Confirmed | Yes, Apache-2.0 app; check the licence of the model you use | https://github.com/janhq/jan/blob/main/LICENSE | 2026-10-15 |
| Paid services needed? | Confirmed | None required; cloud model providers optional | https://github.com/janhq/jan#features | 2026-10-15 |
| Hardware | Confirmed | macOS 8GB RAM for 3B, 16GB for 7B, 32GB for 13B models; GPU optional | https://github.com/janhq/jan#system-requirements | 2026-10-15 |
| Operating systems | Confirmed | Windows 10+, macOS 13.6+, Linux (deb, AppImage, Flathub) | https://github.com/janhq/jan#installation | 2026-10-15 |
| Setup effort | Confirmed | Easy; download installer (exe, dmg, deb, AppImage) or app stores | https://github.com/janhq/jan#installation | 2026-10-15 |

GitHub: 44963 stars, 3101 forks, last push 2026-10-16, archived: no.
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Source: RepoQuarry (https://repoquarry.dev/projects/jan). Data licence: CC BY 4.0. Quotes are from project documentation and belong to their authors.