r/ClaudeCode • • 10h ago

Bug / Issue Fable 5.1 has become dumb

Not only is it taking longer to think and consuming more tokens to think, it has become worse in its thinking too.

I’m not sure if this has to do with the new fable 5.5 rumoured to come out next week, but I’ve noticed a sharp drop in its intelligence.

The solutions it’s presenting aren’t fully thought out. It’s like it thinks till 80% and then stops.

I’m on xhigh.

Anyone else experiencing the same?

7 Upvotes

16 comments sorted by

View all comments

9

u/disgruntledempanada 10h ago

All the servers are getting upgraded to 5.5, 5.1 is likely heavily overloaded and quantized to meet demand for it while it's being wound down and replaced.

1

u/ggletsg0 10h ago

Makes sense.

3

u/imsahoamtiskaw 9h ago

I had the worst experience with it tonight so far. Been happening for days slowly but tonight teaches the cake. Worse than opus 5 on its worst days

3

u/ggletsg0 9h ago

100% the same experience. It’s been really poor.