Because none of the people who can use it (have been and will be using it) can talk about it if it hasn't been announced. NDAs and stuff.

Likely just trying to appear relevant in the news cycle.

It's also kinda wild how the competition being at v6.1 makes 3.x feel ancient, at least saying you are at v4 now changes public perception a bit imo.

promo already happened; perf is about 6 weeks away.

Why would they want this out the day after openai dev day and after both anthropic and openai had major releases the previous week?