I wouldn't mind this change that much if opus-4.7 worked properly in copilot cli. It keeps stopping mid-thought or task and forces me to waste more prompts for no observable reason.

Looks like I'm ending my subscription, good (likely too good, no way my account was even remotely within profitable range) access to opus-4.6 was the only reason I used this at all.

Are you using through regular copilot (the 'local' agent type), or through the separate claude agent type (which I believe you have to activate in your repository settings on github).

I had the exact same issues with the latter - randomly stops working, wipes chat history, just generally seems to be totally broken. But the former works totally fine and still lets you select sonnet/opus. My experience was before this recent 4.6 -> 4.7 change though.