Agora Conversational AI Engine v2.8 Release

We've released Conversational AI Engine v2.8 on June 11, 2026. This release introduces session-level data retention control, RTC token lifecycle management, and new provider options across ASR/LLM/TTS.

What's new in v2.8

Session data retention control

• A new properties.parameters.opt_out parameter is now available when starting an agent. Set it to true to disable data retention for that session.
• By default, session interaction text and audio are temporarily retained for the minimum period necessary to support service operation, agent optimization, and troubleshooting.

RTC token expiry warning

• A new 104 agent expire notification event is triggered when the agent's RTC token is about to expire.
• Upon receiving this event, call the Update agent API with a new token to refresh it. The agent does not exit the channel or interrupt the session when this event is triggered.

New providers

• ASR: xAI
• LLM: xAI Grok
• TTS: xAI

Improvements you'll notice

Idle timeout behavior change

• Setting properties.idle_timeout to 0 no longer means the agent runs indefinitely. From this release, 0 only disables the channel idle timeout.
• Regardless of the idle_timeout value, the maximum running time for a single session is now 72 hours, after which the agent automatically exits.
• If your integration previously relied on idle_timeout = 0 to keep an agent running until manually stopped, update your task scheduling and lifecycle management logic to account for the 72-hour limit.

Retrieve agent history enhancements

• New response fields speech_start_ms, speech_end_ms, and speech_algorithmic_delay are now returned when llm.vendor is custom, providing precise timing data for post-session analysis.

Retrieve a list of agents update

• The state parameter now accepts a comma-separated list of values, allowing you to filter by multiple agent states in a single request (e.g., state=0,1,2).

Note that if you are using OpenAI TTS, you need to manually set sample_rate as 24000 for now.

For full technical details, please refer to the release notes