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A flow can provide the conversation path for a voice assistant. Configure the flow through the assistant; use the supported Assistable phone-number setup for call routing.

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Before you start

You need a tested, published flow, an assistant in the same subaccount, working voice settings with a standard voice (GPT Live voices cannot be combined with a flow), and a number configured for the intended inbound or outbound call path.

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Connect the flow

  1. Publish the flow after checking its branches in Test.
  2. Open the assistant’s model selector and choose that published flow.
  3. Review the assistant’s voice in Voice Studio.
  4. Publish the assistant. This applies the assistant configuration to its voice agent.
  5. Use your normal inbound or outbound setup to run a controlled call.
Publishing the assistant configures its voice integration for the assigned flow. Keep the number routed through the assistant’s supported phone-number setup.

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Verify on a real call

Ask something that takes a recognizable branch. Listen for the greeting, response timing, handling of interruptions, and the next question. Test a missing answer and an integration failure as well as the successful path. If the flow transfers calls or writes to another system, check the transfer destination or external record. A correct spoken confirmation by itself does not prove the action completed.

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Reduce avoidable pauses

Keep node tasks focused, avoid loops through several model-powered steps, and use a short neutral filler for a slow tool. Keep dependent actions synchronous. Model choice affects behavior and response time; test it with the actual voice settings.

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Troubleshooting

  • Call reaches a different assistant: check the number’s routing and assistant assignment.
  • Assistant follows an old flow: publish the latest flow, confirm its selection, then publish the assistant again.
  • Editor test passes but call audio fails: inspect the voice and number setup; the editor runs text turns and does not test voice transport.
  • Flow pauses after a tool or branch: check the tool result and connected default paths.
See testing and model access.

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Which settings belong where

Publish a changed flow to update its conversation logic. Publish an assistant when applying its changed voice configuration. Test both directions you intend to use; an editor selector does not configure inbound or outbound telephony.