--- title: "Changes to POST /v3/create-web-call" method: POST path: "/v3/create-web-call" --- # Changes to POST /v3/create-web-call `POST /v3/create-web-call` > Every recorded change to this operation, newest first. ## Timeline Changed in 10 of 48 revisions. - **2026-10-31** `de3a1d542da5`: 2 warning - **2026-10-30** `5d018ad1bc4d`: 2 info - **2026-10-29** `b982b63b07d0`: 2 warning, 1 info - **2026-10-26** `6e88894224e1`: 9 info - **2026-10-26** `474643b1662e`: 6 info - **2026-10-25** `382069dfb773`: 2 info - **2026-10-21** `f3087f7a3c84`: 4 info - **2026-10-21** `72b7c6dff614`: 4 info - **2026-10-21** `767a744f5db0`: 48 breaking, 9 info - **2026-10-16** `ca41f0dbb297`: 1 info ## Changes - **2026-10-31** `de3a1d542da5`: 2 warning - removed the request property `agent_override/conversation_flow/model_config/anyOf[#/components/schemas/DuplexModelConfig]/voice_prompt` - removed the request property `agent_override/retell_llm/model_config/anyOf[#/components/schemas/DuplexModelConfig]/voice_prompt` - **2026-10-30** `5d018ad1bc4d`: 2 info - added `#/components/schemas/DuplexModelConfig` to the `agent_override/conversation_flow/model_config` request property `anyOf` list - added `#/components/schemas/DuplexModelConfig` to the `agent_override/retell_llm/model_config` request property `anyOf` list - **2026-10-29** `b982b63b07d0`: 2 warning, 1 info - removed the request property `agent_override/conversation_flow/tool_call_strict_mode` - removed the request property `agent_override/retell_llm/tool_call_strict_mode` - added the new `drama-3` enum value to the request property `agent_override/agent/voice_model` - **2026-10-26** `6e88894224e1`: 9 info - added the new `gpt-6.1-terra` enum value to the request property `agent_override/agent/post_call_analysis_model` - added the new `gpt-6.1-terra` enum value to the request property `agent_override/conversation_flow/backup_model/oneOf[#/components/schemas/BackupModelChoice]/allOf[#/components/schemas/ModelChoiceCascading]/model` - added the new `gpt-6.1-terra` enum value to the request property `agent_override/conversation_flow/model_choice/allOf[#/components/schemas/ModelChoice]/oneOf[#/components/schemas/ModelChoiceCascading]/model` - added the new `gpt-6.1-terra` enum value to the request property `agent_override/conversation_flow/model_config/anyOf[#/components/schemas/CascadingModelConfig]/backup/oneOf[#/components/schemas/BackupModelRef]/model` - added the new `gpt-6.1-terra` enum value to the request property `agent_override/conversation_flow/model_config/anyOf[#/components/schemas/CascadingModelConfig]/primary/model` - added the new `gpt-6.1-terra` enum value to the request property `agent_override/retell_llm/backup_model/oneOf[#/components/schemas/BackupModelChoice]/allOf[#/components/schemas/ModelChoiceCascading]/model` - added the new `gpt-6.1-terra` enum value to the request property `agent_override/retell_llm/model/allOf[#/components/schemas/NullableLLMModel]/` - added the new `gpt-6.1-terra` enum value to the request property `agent_override/retell_llm/model_config/anyOf[#/components/schemas/CascadingModelConfig]/backup/oneOf[#/components/schemas/BackupModelRef]/model` - added the new `gpt-6.1-terra` enum value to the request property `agent_override/retell_llm/model_config/anyOf[#/components/schemas/CascadingModelConfig]/primary/model` - **2026-10-26** `474643b1662e`: 6 info - added the new optional request property `agent_override/agent/post_session_tools/items/allOf[subschema #1]/oneOf[#/components/schemas/AppTool]/execution_status_variable` - added the new optional request property `agent_override/agent/post_session_tools/items/allOf[subschema #1]/oneOf[#/components/schemas/CodeTool]/execution_status_variable` - added the new optional request property `agent_override/agent/post_session_tools/items/allOf[subschema #1]/oneOf[#/components/schemas/CustomTool]/execution_status_variable` - added the new optional request property `agent_override/agent/pre_session_tools/items/allOf[subschema #1]/oneOf[#/components/schemas/AppTool]/execution_status_variable` - added the new optional request property `agent_override/agent/pre_session_tools/items/allOf[subschema #1]/oneOf[#/components/schemas/CodeTool]/execution_status_variable` - added the new optional request property `agent_override/agent/pre_session_tools/items/allOf[subschema #1]/oneOf[#/components/schemas/CustomTool]/execution_status_variable` - **2026-10-25** `382069dfb773`: 2 info - added the new optional request property `agent_override/conversation_flow/backup_model` - added the new optional request property `agent_override/retell_llm/backup_model` - **2026-10-21** `f3087f7a3c84`: 4 info - added the new `grok-voice-3.0` enum value to the request property `agent_override/conversation_flow/model_choice/allOf[#/components/schemas/ModelChoice]/oneOf[#/components/schemas/ModelChoiceS2S]/model` - added the new `grok-voice-3.0` enum value to the request property `agent_override/conversation_flow/model_config/anyOf[#/components/schemas/S2SModelConfig]/primary/model` - added the new `grok-voice-3.0` enum value to the request property `agent_override/retell_llm/model_config/anyOf[#/components/schemas/S2SModelConfig]/primary/model` - added the new `grok-voice-3.0` enum value to the request property `agent_override/retell_llm/s2s_model/allOf[#/components/schemas/NullableS2SModel]/` - **2026-10-21** `72b7c6dff614`: 4 info - added the new optional request property `agent_override/agent/post_session_tools/items/allOf[subschema #1]/oneOf[#/components/schemas/AppTool]/parameters/items/additionalProperties` - added the new optional request property `agent_override/agent/post_session_tools/items/allOf[subschema #1]/oneOf[#/components/schemas/CustomTool]/parameters/additionalProperties` - added the new optional request property `agent_override/agent/pre_session_tools/items/allOf[subschema #1]/oneOf[#/components/schemas/AppTool]/parameters/items/additionalProperties` - added the new optional request property `agent_override/agent/pre_session_tools/items/allOf[subschema #1]/oneOf[#/components/schemas/CustomTool]/parameters/additionalProperties` - **2026-10-21** `767a744f5db0`: 48 breaking, 9 info - added `#/components/schemas/ModelChoice` to the `agent_override/conversation_flow/model_choice` request property `allOf` list - added `#/components/schemas/NullableLLMModel` to the `agent_override/retell_llm/model` request property `allOf` list - added `#/components/schemas/NullableS2SModel` to the `agent_override/retell_llm/s2s_model` request property `allOf` list - the request property `agent_override/retell_llm/model` became not nullable - the request property `agent_override/retell_llm/s2s_model` became not nullable - removed the enum value `claude-4.5-haiku` of the request property `agent_override/retell_llm/model` - removed the enum value `claude-4.6-sonnet` of the request property `agent_override/retell_llm/model` - removed the enum value `claude-5-opus` of the request property `agent_override/retell_llm/model` - removed the enum value `claude-5-sonnet` of the request property `agent_override/retell_llm/model` - removed the enum value `claude-5.5-haiku` of the request property `agent_override/retell_llm/model` - removed the enum value `claude-5.5-opus` of the request property `agent_override/retell_llm/model` - removed the enum value `claude-5.5-sonnet` of the request property `agent_override/retell_llm/model` - removed the enum value `gemini-3.0-flash` of the request property `agent_override/retell_llm/model` - removed the enum value `gemini-3.1-flash-lite` of the request property `agent_override/retell_llm/model` - removed the enum value `gemini-3.5-flash` of the request property `agent_override/retell_llm/model` - removed the enum value `gemini-3.5-flash-lite` of the request property `agent_override/retell_llm/model` - removed the enum value `gemini-3.6-flash` of the request property `agent_override/retell_llm/model` - removed the enum value `gemini-3.7-flash` of the request property `agent_override/retell_llm/model` - removed the enum value `gemini-3.8-flash` of the request property `agent_override/retell_llm/model` - removed the enum value `gemini-4-argon` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-4.1` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-4.1-mini` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-5` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-5-mini` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-5-nano` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-5.1` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-5.2` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-5.4` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-5.4-mini` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-5.4-nano` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-5.5` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-5.6-luna` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-5.6-terra` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-6-astra` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-6-luna` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-6-sol` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-6.1-sol` of the request property `agent_override/retell_llm/model` - removed the enum value `gpt-realtime` of the request property `agent_override/retell_llm/s2s_model` - removed the enum value `gpt-realtime-1.5` of the request property `agent_override/retell_llm/s2s_model` - removed the enum value `gpt-realtime-2` of the request property `agent_override/retell_llm/s2s_model` - …17 more - **2026-10-16** `ca41f0dbb297`: 1 info - endpoint added --- [Operation](https://skmtc.dev/retellai/apis/retell-sdk/docs/v3/create-web-call/post.md) - [API](https://skmtc.dev/retellai/apis/retell-sdk.md) - [Page](https://skmtc.dev/retellai/apis/retell-sdk/changes/v3/create-web-call/post)