Claude Fable 5.1 is now in Chat AI

Claude Fable 5.1 has joined the models you can pick in Chat AI. It is built for the long jobs: the ones with several steps, a document to read first, or an answer that has to hold together to the end. Start rough, add detail as you go, and keep the whole thread in one conversation. Everything else in Chat AI stays where it is, from image generation and summaries to translation and everyday questions.