Prompt Caching ROI Calculator
Estimate how much you save by caching static prompts. Write/Read split analysis with break-even point.
Input: $3/1M tokens · Cached: $0.3/1M tokens · Output: $15/1M tokens
Scenario Presets
Token Configuration
System prompt + knowledge base (reused across requests)
Unique per request, never cached
Generated response (never cached)
Volume & Cache Settings
Percentage of requests that reuse cached data. Higher = more cache hits, fewer writes, bigger savings. (10% miss, 90% hit)
Monthly Savings
$364.50
66.4% cheaper with caching
Every 2 cache hits offset the cost of 1 cache miss (write). Higher cache hit rate = better efficiency.
Monthly Cost Comparison
Anthropic offers a 90% discount on cached input tokens for Claude Sonnet 4.6.
Daily Breakdown
- Without cache
- $18.30/day
- With cache
- $6.15/day
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