holy, used fable5 for 24h on medium mode doing design, planning and review directing custom gpt 5.5 low effort agents on implementation, and it seems to have solved what i tried to build the last month with opus 4.6/7/8 (ultracode) and gpt 5.5 on xhigh
cant wait to see gpt 5.6 bc i wont be paying for APIs regardless how good this is. love this IPO competition
Introducing Claude Fable 5: a Mythos-class model that we’ve made safe for general use.
Its capabilities exceed those of any model we’ve ever made generally available.