Deprecated API notice: Legacy model fields

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Legacy model fields

• Create Batch Call
• Create Conversation Flow Subflow
• Create Conversation Flow
• Create Retell LLM
• Import Agent
• Update Batch Call
• Update Conversation Flow Subflow
• Update Conversation Flow
• Update Retell LLM
• Create Phone Call
• POST /v2/create-web-call
• Create Web Call
• Register Phone Call

• tasks[].agent_override.retell_llm.model, model, retell_llm.model, retellLlmData.model, agent_override.retell_llm.model -> model_config.primary
• tasks[].agent_override.retell_llm.s2s_model, tasks[].agent_override.conversation_flow.model_choice, nodes[].model_choice, model_choice, components[].nodes[].model_choice, s2s_model, retell_llm.s2s_model, retellLlmData.s2s_model, conversation_flow.model_choice, conversation_flow.components[].nodes[].model_choice, conversation_flow.nodes[].model_choice, conversationFlow.model_choice, conversationFlow.components[].nodes[].model_choice, conversationFlow.nodes[].model_choice, agent_override.retell_llm.s2s_model, agent_override.conversation_flow.model_choice -> model_config
• tasks[].agent_override.retell_llm.model_temperature, tasks[].agent_override.conversation_flow.model_temperature, model_temperature, retell_llm.model_temperature, retellLlmData.model_temperature, conversation_flow.model_temperature, conversationFlow.model_temperature, agent_override.retell_llm.model_temperature, agent_override.conversation_flow.model_temperature -> model_config.temperature
• tasks[].agent_override.retell_llm.model_high_priority, tasks[].agent_override.retell_llm.model_ultrafast, model_high_priority, model_ultrafast, retell_llm.model_high_priority, retell_llm.model_ultrafast, retellLlmData.model_high_priority, retellLlmData.model_ultrafast, agent_override.retell_llm.model_high_priority, agent_override.retell_llm.model_ultrafast -> model_config.primary.tier
• backup_model, retell_llm.backup_model, retellLlmData.backup_model, conversation_flow.backup_model, conversationFlow.backup_model -> model_config.backup

• Create Conversation Flow Subflow
• Create Conversation Flow
• Create Retell LLM
• Get Conversation Flow Subflow
• Get Conversation Flow
• Get Retell LLM
• List Conversation Flow Subflows
• List Conversation Flow Components V1
• List Conversation Flows
• List Conversation Flows V1
• List Retell LLMV1
• List Retell LLMs
• Update Conversation Flow Subflow
• Update Conversation Flow
• Update Retell LLM

• nodes[].model_choice, model_choice, components[].nodes[].model_choice, s2s_model, items[].nodes[].model_choice, [].nodes[].model_choice, items[].model_choice, items[].components[].nodes[].model_choice, [].model_choice, [].components[].nodes[].model_choice, [].s2s_model, items[].s2s_model -> model_config
• model_temperature, items[].model_temperature, [].model_temperature -> model_config.temperature
• backup_model, items[].backup_model, [].backup_model -> model_config.backup
• model, [].model, items[].model -> model_config.primary
• model_high_priority, model_ultrafast, [].model_high_priority, [].model_ultrafast, items[].model_high_priority, items[].model_ultrafast -> model_config.primary.tier

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Migration details

• Replace deprecated request fields with the replacements listed above.
• Stop depending on deprecated response fields and use the replacements listed above.
• Deprecation date: 01/31/2027.