2026-10-11 18:01 UTC

Cache Analyzer’s creator claims analyzing Claude Code sessions can show when five-minute versus one-hour prompt-cache retention offers a better cost and responsiveness tradeoff for coding-agent workloads.

state: expiredheat: lowuncertainty: highknownscott: lowcoding-agents inference-economics prompt-cachingCache AnalyzerAnthropic

What is this?

Cache Analyzer is described as a site that analyzes Claude Code session activity to compare Anthropic’s five-minute and one-hour prompt-cache TTLs, although the supplied snippets do not identify its creator or explain its implementation. Anthropic’s documentation says the one-hour TTL has a higher cache-write cost but can avoid reprocessing after longer idle gaps, while five minutes is generally cheaper for short, interactive bursts. The best choice therefore depends on observed context reuse and session cadence; Anthropic reportedly says Claude Code selects the TTL automatically rather than exposing a global user setting.

Why it matters to Scott

Scott’s “Prefix-Caching Economics” page already holds the substantive position that cache value depends on context reuse across agent runs, while “Agent Observability” covers deriving cost and latency decisions from session traces. Cache Analyzer is a directly relevant implementation example, but the supplied evidence establishes neither a new finding nor an actionable Claude Code control—indeed, TTL selection is reportedly automatic—so it does not yet change what Scott would build or argue.
ip:concept.prefix-caching-economicsip:concept.agent-observabilityradar:cache-hunter-prompt-cache-debuggingradar:wattage-claude-code-token-wasteradar:concept.prompt-caching
queries asked of Scott's wikis
  • coding-agent session telemetry and cost optimization
  • prompt-cache TTL economics for agent workloads
  • adaptive caching for long-running coding agents
  • agent harness observability and token-cost analysis
  • context reuse across main agents and subagents
  • latency versus inference cost in interactive coding

Measured heat

no measured readings yet — the hourly heat pass fills this in

How the heat travelled

no chain yet — the hourly chain pass fills this in

Evidence (7) — ⭐ canonical anchor

sourceobjectauthorscorecomments
🟧 hnShould your Claude Code sessions cache for five minutes, or an hour?rmason20
🟧 echo.blog ⭐The site analyzes whether Claude Code sessions should use a five-minute or one-hour cache duration.rmason——
🟠 redditIs low-priority (continuing after 5 hour window) A/B testing?
ClaudeAI
The-Pork-Piston12
🟧 hnCutting LLM inference costs by 36% with prompt cachinglizakatz10
🟠 redditFable 5.1’s cache reads are 75% cheaper—but what does that do to the total API bill?
ClaudeAI
DataLearnerAI11
🟠 redditIs 5.1 actually cheaper for you in practice? Mine seems to use more than 5.
ClaudeAI
mmanja84416
🟧 hnPortal by Spotify cut my Claude Code token usage by 90%cebert240151

Interpretation history

Decision trace