We’re upgrading our smartest model.The new Claude Opus 4.6 improves on its predecessor’s coding skills. It plans more carefully, sustains agentic tasks for longer, can operate more reliably in larger codebases, and has better code review and debugging skills to catch its own mistakes. And, in a first for our Opus-class models, Opus 4.6 features a 1M token context window in beta.Opus 4.6 can also apply its improved abilities to a range of everyday work tasks: running financial analyses, doing res...