Anthropic

Today, we're introducing Claude Fable 5 and Mythos 5, two configurations of our next major language model. I'd normally highlight the numbers: It's SOTA on nearly all benchmarks. I want to talk about something else, because with Fable 5 out in the world, I think a third era

May means more models. Today we're introducing Anthropic's Claude Opus 4.8, available now in Copilot Cowork (Frontier) and rolling out to Copilot Chat, Excel, PowerPoint, and Copilot Studio early release cycle environments.