Opus 5.5 is a game changer for me. Super-heavy and deep algorithmic work on a pet project of mine - managed to produce 5% weekly usage in 8 hours. With Opus 5 - interspersed with Fable for supervision and guidance - I'd have used 12-15% in the same time. Mostly void of claudisms; and the results actually work, on a level that's almost on par with Fable.

Impressed.