Sonnet reportedly behaves with a different personality on Medium vs Max tiers

AaronBergman18 · x · 2026-11-04

A user noticed Claude Sonnet shows a noticeably different personality on the Medium vs Max subscription tiers and shared a side-by-side comparison, drawing amused agreement. The post hints Anthropic may run different system prompts or configs across tiers, so the same model can feel inconsistent depending on your plan.

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