Character.ai is a neural language model chatbot web application that can generate human-like text responses and participate in the contextual conversation.

Character.AI is bringing to life the science-fiction dream of open-ended conversations and collaborations with computers.

The dialog agents are powered by their own proprietary technology based on large language models, built and trained from the ground up with conversation in mind.

Outside of perusing the homepage, you can also use the Character.AI search option to see which avatars were available. You find former president Barack Obama, Technoking Elon Musk, as well as book character Percy Jackson, pop star Michael Jackson, and former president Andrew Jackson.

How to create and train characters

At Character.AI, you collaborate with the computer to write a dialog - you write one character's lines, and the computer creates the other character's lines, giving you the illusion that you are talking with the other character.

You have the option to create your own avatars on the Character.AI text generator. Characters don’t have to be notable figures, they can be anything you want from made-up people to RPGs to pets. All you have to do is select Create on the home page and Create a Character.

Source: https://beta.character.ai/help?