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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
One change · claude-code

How Claude Code uses prompt caching changed

prompt-caching

Nearest release: v2.1.272, published 5 hours before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Recorded here
Lines+1added
Lines−1removed
From line 76 where the diff opens
First seen 14 Aug 2026 this site's first read of the page
Recorded edits32to this page, all time

The whole hunk

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7777Each model has its own cache. Switching with [`/model`](/docs/en/model-config#setting-your-model) means the next request reads the entire conversation history with no cache hits, even though the content is identical.
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79When you run `/model` at the terminal, Claude Code asks you to confirm the switch only while the cache is still warm. The cache stays warm for one [cache TTL](#cache-lifetime) after Claude Code last sent a request in this conversation or Claude last responded. Once that time passes, the cache has expired, so Claude Code switches without asking.
79When you run `/model` at the terminal, Claude Code asks you to confirm the switch only while the cache is still warm and the new model isn't the one that produced the last response. The cache stays warm for one [cache TTL](#cache-lifetime) after Claude Code last sent a request in this conversation or Claude last responded. Once that time passes, the cache has expired, so Claude Code switches without asking.
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8181Before v2.1.238, Claude Code didn't check the cache TTL and asked even after the cache had expired.
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