07.03.2025-cost-summaries-in-trace-headers.md•690 B
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description: Available in Phoenix 11.4+
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# 07.03.2025: Cost Summaries in Trace Headers 💸
{% embed url="https://storage.googleapis.com/arize-phoenix-assets/assets/images/cost-summary-trace.png" %}
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**.
{% embed url="https://github.com/Arize-ai/phoenix/pull/8406" %}