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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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7 pages for enable_prompt_caching_1h.

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Track cost and usage Claude Code CLI · in the page agent-sdk/cost-tracking …full input price. To request a 1-hour TTL on cache writes, set the [`ENABLE_PROMPT_CACHING_1H`](/docs/en/env-vars) environment variable. You can export it in your shell or container environment, or p… Claude Code on Amazon Bedrock Claude Code CLI · in the page amazon-bedrock …uest 1-hour prompt cache TTL instead of the 5-minute default # export ENABLE_PROMPT_CACHING_1H=1 ``` The 1-hour cache TTL is billed at a higher rate than the 5-minute default. See [cache lifetime](/d… Claude Code on Claude Platform on AWS Claude Code CLI · in the page claude-platform-on-aws …. To request a 1-hour cache TTL instead of the 5-minute default, set `ENABLE_PROMPT_CACHING_1H=1`. The API bills 1-hour cache writes at a higher rate. See [prompt caching pricing](https://platform.cla… Claude Code on Google Cloud's Agent Platform Claude Code CLI · in the page google-vertex-ai …. To request a 1-hour cache TTL instead of the 5-minute default, set `ENABLE_PROMPT_CACHING_1H=1`; cache writes with a 1-hour TTL are billed at a higher rate. To set different TTLs for your main conve… Claude Code on Microsoft Foundry Claude Code CLI · in the page microsoft-foundry …1-hour TTL are billed at a higher rate: ```bash theme={null} export ENABLE_PROMPT_CACHING_1H=1 ``` To set different TTLs for your main conversation and for the requests Claude Code makes outside it… How Claude Code uses prompt caching Claude Code CLI · in the page prompt-caching …kets 2. The bucket's environment variable 3. The bucket's setting 4. `ENABLE_PROMPT_CACHING_1H=1`, which requests one hour for both buckets 5. The [default for the request's bucket](#which-ttl-each-re… Claude Code settings reference Claude Code CLI · in the page settings-reference …CODE_PROMPT_CACHE_TTL`](/docs/en/env-vars), then this key, and last [`ENABLE_PROMPT_CACHING_1H`](/docs/en/env-vars) This example keeps the main conversation on the one-hour lifetime and leaves subage…