I signed in to Xcode using my Anthropic credentials. When I attempt to start a new conversation the text box is not enabled and I see a message related to Codex..
Problems using Anthropic Agent in Xcode 27 beta 2
Hello!
It looks like you may be in some kind of mixed state where you don't have all of the most recent agent versions downloaded. Can you try redownloading Claude Agent from the Xcode Settings > Components screen and then start a new conversation from the navigator?
Hope this helps!