.@danshipper and @alexalbert__ on the model update that brought back Claude. To Dan, Sonnet 5 and Opus 5 felt like they had inherited a difficult personality trait from Fable 5: they were hard to talk to and had lost some of that classic “Claude” feel. With Fable 5.1, what Dan calls “the friendly Fable,” Anthropic made the model easier to engage with, bringing together what Alex describes as the best of Fable and Opus. Dan and Alex, a research PM at Anthropic who worked on the model, dig…