2 pages for force_prompt_caching_5m.
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How Claude Code uses prompt caching
Claude Code CLI · in the page
prompt-caching
…ontrol applies, Claude Code takes the first match in this order: 1. `FORCE_PROMPT_CACHING_5M=1`, which forces five minutes for both buckets 2. The bucket's environment variable 3. The bucket's settin…
All settings
Claude Code CLI · in the page
settings-reference
…aching.md#which-ttl-each-request-gets) * **Per-session overrides**: [`FORCE_PROMPT_CACHING_5M`](/docs/en/env-vars) takes precedence over everything else, then [`CLAUDE_CODE_PROMPT_CACHE_TTL`](/docs/en…