fwiw, I gave it the same vibecoding project I'd previously tried with Sonnet 4.5 and it took Fable 2 hours to go well beyond (like, 2x beyond) where I got in 8 hours with Sonnet 4.5. (beyond that idk, because past 8 hours with the Sonnet 4.5 version I hit the "vibe limit" where it becomes easier to just write/edit the code yourself than get the agent to do what you want; and past 2 hours with Fable I hit my usage limit.)
Addendum:
Interestingly, it ended up taking me about the same amount of time - 8 hours or so - to hit the "vibe limit" with Fable. But in that amount of time I made about 5-10x as much progress. So my feelings are:
1. It's exponentially better
2. yet, somehow, hand coding still isn't dead, at least for me
It's included free with subscription plans until June 22. I get about 2 hours a day of usage through Claude Code until I hit my usage limit. I just use it for 2 hours then wait for the next day.
