Lydia Hallie· lydiahallie· Published Sep 22, 5:42 PM ET· added Oct 8, 8:36 PM ET32/100AI score32/100

Opus 5.5 effort switches keep prompt cache intact in Claude Code v2.1.280+

Original titleSwitching effort mid-session on Opus 5.5 doesn't break your prompt cache btw! Just make sure you're on Claude Code v2.1.280+

AISummary

Switching effort levels mid-session on Opus 5.5 does not break the prompt cache, according to Lydia Hallie of Anthropic. This holds when running Claude Code v2.1.280 or later.

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Source: Lydia Hallie · x.comPublished Sep 22, 5:42 PM ET · added here Oct 8, 8:36 PM ET

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