Has Opus in Antigravity performance degraded recently?

Is anyone else noticing this? Opus seems noticeably “dumber” lately, especially over the past couple of days following the recent Google conference.

Did they silently swap Opus’s base model or add new restrictions? It’s currently struggling to see a lot of information inside uploaded documents, or it just seems unwilling to process them properly.

Has anyone else encountered this? Are there any workarounds to fix this issue?