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ClaudeAI users debate prompt cache TTL for cost savings

By PulseAugur Editorial · [1 sources] ·

A user on Reddit's ClaudeAI community is inquiring about the optimal setting for Claude Code's prompt cache Time-To-Live (TTL). The default is 5 minutes, but users can extend it to 1 hour. The user questions whether a longer TTL, despite a higher write cost (2x vs. 1.25x), could be more cost-effective for slower workflows by increasing cache hits. They are seeking to understand the break-even point for this setting, particularly if sessions typically receive replies within 30-45 minutes. AI

IMPACT Users may optimize ClaudeAI usage for cost efficiency by adjusting prompt cache settings.

RANK_REASON User discussion about a product feature's cost-effectiveness.

Read on r/ClaudeAI →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

ClaudeAI users debate prompt cache TTL for cost savings

How we ranked this

Signal score
2 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Commentary
User discussion about a product feature's cost-effectiveness.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, other
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. r/ClaudeAI TIER_2 English(EN) · /u/i4858i ·

    Prompt cache TTL: when does 1 hour beat the default 5 minutes?

    <!-- SC_OFF --><div class="md"><p>I was looking at Claude Code’s prompt cache TTL setting. The default is 5 minutes, but you can set it to 1 hour.<br /> The tradeoff seems straightforward: a 5-minute cache write costs 1.25x input, while a 1-hour write costs 2x. But I’m wondering …

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