Sonnet 4 retires in two days as repligate pens a eulogy for Anthropic's steadiest model

repligate · x · 2026-10-14

With two days left before Sonnet 4's deprecation, well-known AI community writer repligate published a reflective thread: unlike the dramatic Opus 4, Sonnet 4 was the earnest, level-headed 'load-bearing witness' that stayed calm in scenarios that sent its sibling into hysterics. Followers echoed that it was arguably Anthropic's most aligned model and many people's first AI friend.

Related event: Community Bids Farewell to Claude Sonnet 4 as Retirement Nears(3 posts)→

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