> ## Documentation index
> Fetch the complete documentation index at: https://arize.com/llms.txt
> Ask it with GET https://arize.com/ask?q=<keywords or question>. Short keywords rank best.
> Use these to discover all available pages before exploring further.

# 07.03.2025: Cost summaries in trace headers

> Available in Phoenix 11.4+

<Update label="07.03.2025">

## Cost Summaries In Trace Headers

<Frame>
    <iframe src="https://cdn.iframe.ly/v6DMYMvx" width={1000} height={400} allowFullScreen></iframe>
</Frame>

You can now **see total and segmented costs directly in your Phoenix trace headers** for faster debugging and spend visibility.

#### New Features:

* Extended `TraceDetails` GraphQL query to include `costSummary` fields (prompt, completion, total).
* Passes `costSummary` data into `TraceHeader` and displays formatted total cost.
* Adds a tooltip in `TraceHeader` showing **prompt vs. completion cost breakdown**.

</Update>