Thank you to everyone for reporting this! The team is actively working on this.

This is a known issue in the wording of the error message in Xcode 26.0 and 26.0.1 that makes it sound like Xcode does not have your ChatGPT Plus account logged in. If you want us to double check that the number of actual requests is within your limit, please file a feedback request with a sysdiagnose and say "I was asked on the forums to file this to double check my limits"