Why does the response speed of Claude Opus 4.6 (Thinking) in the antigravity IDE become so fast, as if it's not even thinking?

I wonder if you have noticed this: In the antigravity IDE, not only has the option for the planning mode been removed, but also the level of thinking in the Claude Opus 4.6 (Thinking) model seems to have decreased. This change has occurred very quickly, the thinking time is twice as fast as antigravity 1.32! Have you experienced this? What could be the reason for this? Were the different system prompts simply a result of the Antigravity team’s covert adjustments?