Anthropic appears to have silently downgraded Claude Code's prompt cache TTL from 1 hour to 5 minutes around March 6, 2026. Analysis of 119,866 API calls across two machines shows a 20-32% increase in cache creation costs and quota consumption spikes for subscription users, without public communication.
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Anthropic silently downgraded cache TTL from 1h → 5M on March 6th
Anthropic cut Claude Code's prompt cache TTL from 1 hour to 5 minutes on March 6 without disclosure, imposing a 20-32% cost increase on subscription users across 119K API calls.
Sunday, April 12, 2026 12:00 PM UTC2 MIN READSOURCE: Hacker NewsBY sys://pipeline
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