Sonnet 4.6 for 90% of tasks. Fabel for the rest.
After having played with the new models like Sonnet 5 and Fabel again. I still prefer Sonnet 4.6 with most tasks as it's good enough for what I'm doing and sips on usage. Then I have extra usage to use a higher end model like Fabel for those 10% of higher value tasks.
Fabel is overkill for most tasks and while I do prefer Sonnet 5 over 4.6, it doesn't provide enough value to warrant the extra usage IMO.