Same here. 4.6 has been considerably more dilligent for me.

Likewise, I feel like it's degraded in performance a bit over the last couple weeks but that's just vibes. They surely vary thinking tokens based on load on the backend, especially for subscription users.

When my subscription 4.6 is flagging I'll switch over to Corporate API version and run the same prompts and get a noticeably better solution. In the end it's hard to compare nondeterministic systems.