The Sonnet 5 comment is spot on. Even Anthropic's own graph initially showed lower performance at higher costs. Only thing I notice about Sonnet 5 is that it does appear to hand off tasks to agents more frequently similar to Fable, but of course nowhere near the quality of Fable. My guess is that Opus 5 will do similar but just isn't ready yet.

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cute_boi a day ago | parent [-]

Sonnet 5 is a huge regression and many times it performs worst than deepseek. I believe Antrophic staff themself don't use Sonnet and use Fable for everything.

	▲	asdewqqwer a day ago \| parent [-]
		Given the capability of fable and the shockingly repetitive silly mistakes they made when publishing/updating something, I am starting to wondering whether Anthrophic can afford Fable for everything themselves.