3 pages for claude_code_subagent_prompt_cache_ttl.
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Track cost and usage
Claude Code CLI · in the page
agent-sdk/cost-tracking
…en/settings-reference#promptcachettl) setting * Everything else: the `CLAUDE_CODE_SUBAGENT_PROMPT_CACHE_TTL` environment variable, or the [`subagentPromptCacheTtl`](/docs/en/settings-reference#subagen…
How Claude Code uses prompt caching
Claude Code CLI · in the page
prompt-caching
…(/docs/en/settings-reference#subagentpromptcachettl) setting, or the `CLAUDE_CODE_SUBAGENT_PROMPT_CACHE_TTL` environment variable Both settings and both environment variables require Claude Code v2.1…
All settings
Claude Code CLI · in the page
settings-reference
…5M`](/docs/en/env-vars) takes precedence over everything else, then [`CLAUDE_CODE_SUBAGENT_PROMPT_CACHE_TTL`](/docs/en/env-vars), then this key, then [`ENABLE_PROMPT_CACHING_1H`](/docs/en/env-vars), w…