> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vortexiq.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Prompt Cache Hit Rate (30d), OpenAI KPI card, Vortex IQ Nerve Centre

> input_cached_tokens / input_tokens x 100. Higher = cheaper repeat prompts.

**[Nerve Centre KPIs](/nerve-centre/kpi-cards/openai) · [Sentiment Settings](/nerve-centre/kpi-cards/openai/sentiment)**

## At a glance

* **Category:** Tokens
* **Type:** Supporting Metrics
* **Chart:** gauge
* **Format:** percent
* **Time window:** 30D

## Calculation

input\_cached\_tokens / input\_tokens x 100. Higher = cheaper repeat prompts.

## Known limitations

*Known limitations, FAQs, or reconciliation notes specific to this card. Replace this block when authored.*