This change is only showing up in the Preview release notes, however it is silently already included in the Stable release for Zed-hosted Opus/Sonnet right now. The only reason I realized this is because my bill was growing larger than usual due to the fact that the context window indicator appeared to be at a low percentage, but it was actually high because I did not know it changed from 200K to 1M.

Also, I think this should be a configurable option to remain using the previous 200K window. 1M seems unreasonable with the Zed pricing model, you can very quickly spend a lot of money especially if you are keeping a thread going outside of the cache timeout. If users want to start new thread before 200K but the window is fixed at 1M, the percentage indicator in the UI becomes not very useful.