# Overview

ChatGPT is the Swiss Army knife of LLMs. It will be the main tool you end up using for your AI tasks. 

ChatGPT is available in two versions: 

* v3.5
  * Unlimited messages
  * No plugins or internet access
* v4
  * 50 messages per 3 hours
  * Plugins and internet access (Bing)
  * CustomGPTs

**URL**: <https://chat.openai.com/> - It is accessible in multiple places, but it works best within OpenAi's website