- The following models are being deprecated and replaced with newer versions:
- OpenAI Realtime models:
gpt-4o-realtime→ replaced withgpt-realtime-1.5gpt-4o-mini-realtime→ replaced withgpt-realtime-mini
- Cartesia Sonic models:
sonic-2→ replaced withsonic-3sonic-turbo→ replaced withsonic-3
- After 4/3/2026, the deprecated models will no longer be available.
- OpenAI Realtime models:
Detailed Deprecation Guide
Deprecated on 04/03/2026
On 04/03/2026 Retell replaces OpenAI Realtime models (gpt-4o-realtime, gpt-4o-mini-realtime) and Cartesia Sonic-2 and Sonic-Turbo with their newer counterparts.