Category: Enhancement
Location: Voice Agents → open or create an agent → Voice
Release Date: October 8 2026
What’s new
• V4 Turbo is available as an optional speech-model family, marked New in the picker.
• Flash remains the recommended default. Existing agents are not automatically switched.
• V4 Turbo supports Stability and Similarity controls, but not the Speed slider, Expressive mode, or suggested audio tags.
How to use it
• Open Voice Agents and create an agent or edit an existing one.
• In Voice, open the speech-model picker and select V4 Turbo.
• Keep or select a voice, then save the agent.
• Place a test call to assess the voice on that agent before using it more broadly.
Impact
• Teams can choose V4 Turbo for individual agents without changing the models used by other agents.