Unverified70% confidenceFactExact time

A sideband connection is an event channel in the Realtime API that is independent of the main WebSocket session and is used to send outbound control-type events such as transcription text and tool-call status.

2

Sources

70%

Confidence

Long-term

Relevance

10/18/2026

First Seen

Sources

OpenAI SDK v3.35.0 Update: Agents Gains Ultrafast Service Tier

Related Entities

Realtime APIproduct Sidebandconcept

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