This date has passed. If it just broke for you, what to do is below.

criticalShutdown

gpt-4o-realtime-preview is removed from the API

Announced
15 Sept 2025
Effective
passed 7 May 2026
Source
the vendor’s own page · last checked 23 Sept 2026

What breaks

Realtime sessions naming this model fail to open. Live audio and voice features stop connecting rather than degrading.

What to do

Move to gpt-realtime-1.5.

Advice confirmed 23 Sept 2026

What the vendor said

On 15 September 2025 OpenAI notified developers using gpt-4o-realtime-preview models of their deprecation and removal from the API.

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