Anthropic enhanced its API Prompt Caching with automated TTL sliding renewal. For sustained agent interactions, active context caches are automatically extended without re-write penalties, reducing overall token write costs by 40% in multi-turn software workflows while maintaining sub-300ms TTFT.
Key Takeaways
- ✓Active context caches automatically slide TTL window, avoiding recurring cache write surcharges.
- ✓Reduces multi-turn developer session token expenses by an average of 40%.
- ✓Maintains sub-300ms time-to-first-token (TTFT) during dense MCP tool calls.
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