Follow Discord
Sweep 02 Oct 2026 · 18:55Z Build v2.1.288 509 read Stable v2.1.285 Latest v2.1.287 Next v2.1.288 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Code CLI 30 Sep 2026
One change · claude-code

How Claude Code uses prompt caching changedprompt-caching

Nearest release: v2.1.285, published 11 hours before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Upstream edited this page at 30 Sep 2026 04:32 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 30 Sep 2026 04:37 UTC.

Upstream edited
Recorded here
Lines+4added
Lines−2removed
From line 342 where the diff opens
First seen 14 Aug 2026 this site's first read of the page
Recorded edits38to this page, all time

The whole hunk

from line 342, old and new numbered
/
lines
from line 342
342342| - | - |
343343| `DISABLE_PROMPT_CACHING` | Disable for all models |
344344| `DISABLE_PROMPT_CACHING_HAIKU` | Disable for the default Haiku model |
345| `DISABLE_PROMPT_CACHING_SONNET` | Disable for Sonnet only |
346| `DISABLE_PROMPT_CACHING_OPUS` | Disable for Opus only |
345| `DISABLE_PROMPT_CACHING_SONNET` | Disable for the default Sonnet model |
346| `DISABLE_PROMPT_CACHING_OPUS` | Disable for the default Opus model |
347347| `DISABLE_PROMPT_CACHING_FABLE` | Disable for Fable only |
348348 
349349`DISABLE_PROMPT_CACHING_HAIKU` applies to the default Haiku model, the model the `haiku` alias resolves to. It disables caching wherever that model runs, including the main conversation when it is your main model. Covering the main conversation requires Claude Code v2.1.283 or later.
from line 351
351351The variable also covers a background model you set with the deprecated `ANTHROPIC_SMALL_FAST_MODEL` variable, when that model differs from your main model.
352352 
353353A different Haiku version that you pin as your main model keeps caching; set `DISABLE_PROMPT_CACHING` to disable caching for it.
354 
355`DISABLE_PROMPT_CACHING_SONNET` and `DISABLE_PROMPT_CACHING_OPUS` each apply to the model the `sonnet` or `opus` alias resolves to. If you set any other Sonnet or Opus model ID as your main model, that model keeps caching. For example, a session on `claude-sonnet-5` keeps caching while `sonnet` resolves to `claude-sonnet-5-5`. To disable caching for that model, set `DISABLE_PROMPT_CACHING`.
354356 
355357To set caching policy across an organization, put any of these or the [TTL variables](#cache-lifetime) in the `env` block of [managed settings](/docs/en/managed-settings). For normal use, leave caching enabled.
356358 
Feedback