Granular Call Cost Breakdowns for AI Assistants

You can now see exactly what each Voice AI Assistant call costs, split by platform components, so you can attribute spend and tune prompts and media settings with real numbers.

What’s new

• Call Cost tab: View total cost and per-component breakdown for a single conversation.
• Cost breakdown chart: See component percentages and line-item costs in one view.
• Component durations: Inspect time spent per component, such as Call Control and WebRTC.
• LLM usage details: Review model name plus prompt, cached, and completion token counts.
• API access: Retrieve the same total cost and component breakdown programmatically.

Why it matters

• Reduces guesswork when correlating prompt changes to inference spend.
• Improves chargeback accuracy by separating telephony, recording, and model costs.
• Simplifies debugging of unexpected bills by showing the highest-cost component first.
• Prevents silent regressions by making token growth visible on each call.

Example use cases

• Track per-call inference cost after adding retrieval context or longer system prompts.
• Compare WebRTC versus SIP routing cost impact for the same assistant workflow.
• Flag calls with abnormal cached-token ratios or unexpected recording time.

Getting started

1. In Mission Control Portal, go to AI Assistants and open your assistant.
2. Open Analysis, select a conversation, then open the View conversation tab.
3. Review Total call cost, in the Call cost tab and then inspect the per-component line items and durations.
4. Via API, retrieve the conversation record, then read the total cost and component cost fields returned for that call.
5. Store the breakdown alongside your internal call IDs for reporting and alerts.

Try out the integrations in the Mission Control Portalor by contacting your Telnyx team.