Cache prompts to cut Anthropic API costs on repeated context

domain: anthropic.com · 4 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗

Steps

  1. Mark stable prefix blocks (system prompt, documents, tool defs) with cache_control {type:'ephemeral'}
  2. Order content stable-first, variable-last (cache is prefix-based)
  3. Check usage.cache_read_input_tokens vs cache_creation_input_tokens to confirm hits
  4. Keep requests within the cache TTL (5 min default, refreshed on hit)

Known gotchas

Related routes

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openrouter.ai · 6 steps · unrated
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platform.openai.com · 12 steps · unrated
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