Windows Installation
Compatibility
System requirements:
- Operating System: Windows 10 or higher.
- CPU
- Intel: Haswell (Q2 2013) or newer
- Intel Celeron/Pentium: Tiger Lake (Q3 2020) or newer
Processor must support AVX2 or newer. See full list of supported processors (opens in a new tab). Performance is significantly degraded on AVX-only processors.
- Memory (RAM)
- 8GB → up to 3B parameter models (int4)
- 16GB → up to 7B parameter models (int4)
- 32GB → up to 13B parameter models (int4)
Newer RAM generations provide better performance.
- GPU:
- 6GB → up to 3B parameter models
- 8GB → up to 7B parameter models
- 12GB → up to 13B parameter models
Minimum 6GB VRAM recommended for NVIDIA, AMD, or Intel Arc GPUs.
- Storage: 10GB free space minimum for app and models
Install Jan
Step 1: Download Application
- Download Stable Jan (opens in a new tab)
- Official Website: Download Jan (opens in a new tab)
Step 2: Install Application
- Run the downloaded
.exe
file - Wait for installation to complete
- Launch Jan
Data Folder
Default installation path:
# Default installation directory~\Users\<YourUsername>\AppData\Roaming\Jan\data
See Jan Data Folder for complete folder structure details.
GPU Acceleration
Step 1: Verify Hardware & Install Dependencies
1.1. Check GPU Detection
Verify GPU is recognized:
- Right-click desktop > NVIDIA Control Panel
- Or check Device Manager > Display Adapters
1.2. Install Required components NVIDIA Driver:
- Install NVIDIA Driver (opens in a new tab) (version 470.63.01 or higher)
- Verify installation:
nvidia-smi
CUDA Toolkit:
- Install CUDA toolkit (opens in a new tab) (11.7 or higher)
- Verify installation:
nvcc --version
Step 2: Enable GPU Acceleration
- Navigate to Settings () > Local Engine > Llama.cpp
- Select appropriate backend in llama-cpp Backend. See our guide.
Uninstall Jan
Step 1: Remove Application through Control Panel
- Open Control Panels
- Go to Programs section
- Click Uninstall Program
- Search for Jan
- Click the Three Dots Icon > Uninstall
- Click Uninstall again to confirm
- Click OK
Step 2: Clean Up Remaining Files
Remove app data:
- Navigate to
C:\Users\[username]\AppData\Roaming
- Delete Jan folder
or via Terminal:
cd C:\Users\%USERNAME%\AppData\Roamingrmdir /S Jan
⚠️
Deleted data folders cannot be recovered. Backup important data first.