ChatGPT is essentially a simplified representation of how AI appears to users. OpenAI, which is based on a real language model, has created one of the most advanced AI chatbots available, allowing users to ask questions and converse with humanlike processing. So advanced, in fact, that Microsoft uses it as the foundation for Bing Chat, though AI models still have a long way to go in terms of replacing factual sources. Now, OpenAI has announced that its ChatGPT model is now available on the iOS App Store, with an asterisk for Android users.