If you’re wondering how to install ChatGPT locally, this guide will walk you through the easiest and most powerful solutions. Running ChatGPT on your computer allows you to use AI offline, protect your privacy, and reduce costs.

This tutorial covers LM Studio, Ollama, system requirements, local API setup, and recommended models.

1. What Is Local ChatGPT?

Local ChatGPT means running an AI model directly on your PC instead of using cloud services. This ensures:

✔ 100% privacy
✔ No monthly subscription
✔ Full offline usage
✔ Customizable AI models

Popular local models include:

Llama 3
Mistral
Phi-3
Gemma
Qwen

2. System Requirements for Running ChatGPT Locally

To follow this guide and understand how to install ChatGPT locally, ensure your computer meets these specs:

CPU-only

Works fine but slower.

GPU

Best speed and smooth performance.

3. Best Ways to Install ChatGPT Locally

There are two top methods:

LM Studio (best for beginners)
Ollama (best for developers)

Both allow you to run LLMs offline and integrate them into apps.

🥇 Method 1: Install ChatGPT Locally with LM Studio

To learn how to install ChatGPT locally, LM Studio is the easiest approach.

Step 1 — Download LM Studio

Go to the official LM Studio website → download Windows/Mac/Linux version.

Step 2 — Install normally

Launch the application.

Step 3 — Download a model

Search for models such as:

Llama 3 8B
Mistral 7B
Phi-3 Mini

Choose the .gguf version → click Download.

Step 4 — Run ChatGPT locally

Go to Local Models → Launch.
Start chatting offline instantly.

Step 5 — Use the API

LM Studio provides an API at:

http://localhost:1234/v1

You can integrate it into your website or apps.

🥈 Method 2: Install ChatGPT Locally with Ollama

If you’re a developer searching “how to install ChatGPT locally,” this is the most flexible option.

Step 1 — Install Ollama

Download and install from the official site.

Step 2 — Run a model

Example:

ollama run llama3

Download more:

ollama pull mistral
ollama pull phi3

Step 3 — Chat in the terminal

ollama run llama3

Step 4 — Use the REST API

http://localhost:11434/api/generate

4. Best Local AI Models to Use (2025)

Model	Size	Best Use Case
Llama 3 8B	4–5GB	General use / coding
Mistral 7B	4GB	Reasoning & logic
Phi-3 Mini	2GB	Weak laptops
Gemma 2 9B	5GB	Human-like replies
Qwen 2 7B	4GB	Writing & translation

5. Pros & Cons of Running ChatGPT Locally

⭐ Pros

No data leaves your computer
Free to use
Works offline
Customizable models

❗ Cons

Requires strong hardware
Not as powerful as GPT-4/5
Speed depends on your CPU/GPU

6. Conclusion: Should You Install ChatGPT Locally?

If you value:

privacy
performance
offline AI
zero subscription fees

…then running ChatGPT locally is a great choice.

For beginners → LM Studio
For developers → Ollama

How to Install ChatGPT Locally on Your Computer (Full Guide 2025)