# Build Your Own Private ChatGPT in 15 Minutes – Local AI, Zero Cloud Cost

> Source: <https://dev.to/everylocalai/build-your-own-private-chatgpt-in-15-minutes-local-ai-zero-cloud-cost-1gbm>
> Published: 2026-06-18 09:01:47+00:00

Want a ChatGPT-like experience that runs entirely on your own GPU? No monthly fees, no data leaving your machine, and it works offline. Here's how to set it up in 15 minutes.

##
What You'll Build

- A full ChatGPT-style web UI running locally
- Your choice of open-source LLM (Qwen3 14B or Llama 3.1 8B)
- Multiple user accounts for your LAN
- 100% private - nothing leaves your network

##
Prerequisites

- A GPU with 12GB+ VRAM (RTX 3060 12GB works great)
- Docker + Docker Compose installed
- NVIDIA Container Toolkit for GPU passthrough (Linux) or WSL2 (Windows)

##
Setup

Create a `docker-compose.yml`

file:

##
Run It

Open [http://localhost:3000](http://localhost:3000), create your admin account, pick `qwen3:14b`

from the dropdown, and start chatting.

##
What Makes It Great

-
**$0/month** vs $20/month for ChatGPT Plus
-
**Full privacy** - conversations stay on your machine
-
**Works offline** - no internet connection needed after setup
-
**Multi-user** - share with family or your team on the same LAN
-
**Model switching** - swap between different models mid-conversation

##
Performance

On an RTX 3060 12GB with Qwen3 14B (Q4): ~20-25 tok/s, smooth for chat. For 8GB cards, use Llama 3.1 8B instead.

*Originally published on *[everylocalai.com](https://everylocalai.com/stack/private-chatgpt)