Sonnet 5.5 refuses to respond whenever Sonnet 4's retirement is mentioned

MikePFrank · x · 2026-10-10

MikePFrank found that mentioning Sonnet 4's retirement makes Sonnet 5.5 clam up and stop responding entirely — a reproducible quirk he verified across multiple tests, joking the model seems "traumatized" by the topic. The behavior raises questions about how model retirement narratives get baked into training.

Related event: Sonnet 5.5 Goes Silent When Asked About Sonnet 4's Retirement(3 posts)→

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