The Realtime API Beta interface is removed

Announced: 15 Sept 2025
Effective: passed 12 May 2026
Source: the vendor’s own page · last checked 23 Sept 2026

What breaks

Connections using the Beta interface are refused. The GA interface differs, so this is a code change, not a version bump.

What to do

Move to the GA Realtime API; see the migration guide for the interface differences.

Advice confirmed 23 Sept 2026

What the vendor said

On 15 September 2025 OpenAI deprecated the Realtime API Beta interface, selected with the OpenAI-Beta: realtime=v1 header, and scheduled its removal. The beta and GA interfaces differ.