Create and edit Retell LLM agents—prompt, models, voice, and speech settings.
Creates a Retell LLM, binds voice and speech settings, then publishes.
Retell dynamic variables: use {{variable_name}} in the prompt or opening line. Pass values per call from Manual dial, Batch, or Web (or set defaults below).
{{variable_name}}
Retell begin_message. Use empty string in Retell UI to wait for user; here leave text or clear as needed.
Loaded from Retell: default_dynamic_variables plus any {{placeholders}} in the prompt / opening line. Stored on the LLM; calls can override with retell_llm_dynamic_variables.
default_dynamic_variables
{{placeholders}}
retell_llm_dynamic_variables
Voices from Retell list-voices. Preview uses preview_audio_url when Retell returns it.
list-voices
preview_audio_url