> ## 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.

# Cost by Line Item (30d), OpenAI KPI card, Vortex IQ Nerve Centre

> Costs grouped by line_item (e.g. per-model input/output token charges).

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

## At a glance

* **Category:** Spend
* **Type:** Supporting Metrics
* **Chart:** donut
* **Format:** currency
* **Time window:** 30D

## Calculation

Costs grouped by line\_item (e.g. per-model input/output token charges).

## Known limitations

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