Silly me for hoping they'd actually honor their original 14-day promise. Per their latest blog post, they've generously slashed the timeline to 7 days, but wait there's more! It's now limited to 50% of your weekly usage:
> Fable 5 will be available starting tomorrow, Wednesday, July 1, to users globally... Fable 5 will be included for up to 50% of weekly usage limits through July 7, after which it will be available via usage credits.
https://www.anthropic.com/news/redeploying-fable-5