You can now request early access to Meta AI, a large language model that inhabits Facebook Messenger, Instagram, and WhatsApp. The AI uses Llama 2 technology to answer questions and can tap into the Emu model to generate images. Additionally, Meta is offering a host of AI characters that fulfill specific roles. These characters are represented by a selection of 28 celebrities — Snoop Dogg plays an on-demand dungeon master, Roy Choi's character offers culinary tips, and Naomi Osaka is the face of an anime-obsessed AI.