Anthropic downgraded cache TTL on March 6th
Anthropic just cut cache TTL. Here's why your Claude integration costs more now.
Why it matters
Anthropic reduced prompt caching time-to-live (TTL), forcing developers to re-cache contexts more frequently. This is a stealth cost increase and operational change for builders relying on Claude's caching for cost efficiency.
The key facts
10 to knowCache TTL downgrade deployed March 6, 2026
Change surfaced via GitHub issue #46829 (Claude Code repo)
Community discussion on HN: 330 points, 241 comments
Impact: increased API calls and compute costs for cached prompt reuse
Affects developers using Claude for long-context or repetitive tasks
Cache TTL downgrade announced March 6, 2026
Change surfaced via GitHub issue (claude-code repo)
330 points, 241 comments on HackerNews — high community signal of concern
Affects prompt caching cost model for Claude API users
Likely impacts batch processing, long-context workflows, RAG systems with cached embeddings
Go to the source
Hacker Newsgithub.com
Publisher excerpt: Article URL: Comments URL: Points: 330 # Comments: 241