Server events

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Server events for the Qwen-Omni-Realtime API, including tool calling (function calling) events.

See Qwen-Omni-Realtime.

error

Server error.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always error.

errorobject

Error details.

Properties

typestring

The error type.

codestring

The error code.

messagestring

The error message.

paramstring

The parameter associated with the error, such as session.modalities.

{
  "event_id": "event_RoUu4T8yExPMI37GKwaOC",
  "type": "error",
  "error": {
    "type": "invalid_request_error",
    "code": "invalid_value",
    "message": "Invalid modalities: ['audio']. Supported combinations are: ['text'] and ['audio', 'text'].",
    "param": "session.modalities"
  }
}

session.created

Returned when a client connects. Contains the default session configuration.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always session.created.

sessionobject

The session configuration.

Properties

objectstring

This value is always realtime.session.

modelstring

The model used.

modalitiesarray

The output modalities for the model.

voicestring

The voice for model-generated audio.

input_audio_formatstring

Input audio format. Only pcm is supported (16 kHz sample rate).

output_audio_formatstring

Output audio format. Only pcm is supported (24 kHz sample rate).

input_audio_transcriptionobject

The transcription configuration.

Properties

modelstring

Transcription model. Always qwen3-asr-flash-realtime. Not configurable.

turn_detectionobject

The voice activity detection (VAD) configuration.

Properties

typestring

The VAD type. Valid values are server_vad (default) or semantic_vad. See Client events.

thresholdfloat

The VAD detection threshold.

silence_duration_msinteger

Silence duration (ms) that triggers end-of-speech detection.

idle_timeout_msinteger

The idle timeout in milliseconds. Returned only in server_vad mode with qwen3.5-omni-plus-realtime or qwen3.5-omni-flash-realtime models.

enable_searchboolean

Whether to enable web search. Supported only by Qwen3.5-Omni-Realtime series model.

search_optionsobject

The options for the web search.

temperaturefloat

The temperature parameter for the model.

{
    "event_id": "event_RdvlSpbBb2ssyBjYrDHjt",
    "type": "session.created",
    "session": {
        "object": "realtime.session",
        "model": "qwen3-omni-flash-realtime",
        "modalities": [
            "text",
            "audio"
        ],
        "voice": "Cherry",
        "input_audio_format": "pcm",
        "output_audio_format": "pcm",
        "input_audio_transcription": {
            "model": "qwen3-asr-flash-realtime"
        },
        "turn_detection": {
            // The value can be server_vad or semantic_vad (only supported by qwen3.5-omni-realtime series model).
            "type": "server_vad",
            "threshold": 0.5,
            "prefix_padding_ms": 300,
            "silence_duration_ms": 800,
            "create_response": true,
            "interrupt_response": true
        },
        "enable_search": false,
        "search_options": {},
        "tools": [],
        "temperature": 0.8,
        "id": "sess_Ov7GOXoNXhNjlxXtOGKQS"
    }
}

session.updated

Returned after a successful session.update request. On failure, an error event is returned instead.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always session.updated.

sessionobject

The session configuration.

Properties

temperaturefloat

The temperature parameter for the model.

modalitiesarray

The output modalities for the model.

voicestring

The voice for model-generated audio.

instructionsstring

The model's goal and role.

input_audio_formatstring

Input audio format. Only pcm is supported (16 kHz sample rate).

output_audio_formatstring

Output audio format. Only pcm is supported (24 kHz sample rate).

input_audio_transcriptionobject

The transcription configuration.

Properties

modelstring

Transcription model. Always qwen3-asr-flash-realtime. Not configurable.

turn_detectionobject

The voice activity detection (VAD) configuration.

Properties

typestring

The VAD type. Valid values are server_vad (default) or semantic_vad. See Client events.

thresholdfloat

The VAD detection threshold.

silence_duration_msinteger

Silence duration (ms) that triggers end-of-speech detection.

idle_timeout_msinteger

The idle timeout in milliseconds. Returned only in server_vad mode with qwen3.5-omni-plus-realtime or qwen3.5-omni-flash-realtime models.

enable_searchboolean (optional)

Whether to enable web search. Supported only by Qwen3.5-Omni-Realtime series model.

search_optionsobject (optional)

The web search options.

toolsarray (optional)

Tool definitions. When configured, the model can decide whether to call a tool based on user input.

Properties

typestring (required)

This value is always function.

function.namestring (required)

The function name, such as get_current_weather or get_current_time.

function.descriptionstring (optional)

Description of the function's purpose. The model uses this to decide whether to call the function.

function.parametersobject (optional)

Input parameter schema. The model uses this to extract parameters. Omit if the function takes no parameters.

Properties

typestring (required)

This value is always object.

propertiesobject (optional)

Each key is a parameter name mapped to an object with type and description.

requiredarray (optional)

Specifies which input parameters are required.

top_pfloat

The probability threshold for nucleus sampling.

top_kinteger

Candidate set size for sampling during generation.

max_tokensinteger

Maximum tokens the model can return for this request.

repetition_penaltyfloat

Controls repetition in consecutive sequences during generation.

presence_penaltyfloat

Controls repetition in generated content.

seedinteger

The degree of consistency in the model's output per request.

{
    "event_id": "event_X1HsXS4b4uptp6yo1LgKd",
    "type": "session.updated",
    "session": {
        "id": "sess_Aih6vAcY5Ddt6jwFx1tCa",
        "object": "realtime.session",
        "model": "qwen3-omni-flash-realtime",
        "modalities": [
            "text",
            "audio"
        ],
        "instructions": "You are Xiao Yun, a personal assistant. Answer user questions accurately and in a friendly manner. Always respond with a helpful attitude.",
        "voice": "Cherry",
        "input_audio_format": "pcm",
        "output_audio_format": "pcm",
        "input_audio_transcription": {
            "model": "qwen3-asr-flash-realtime"
        },
        "turn_detection": {
            // The value can be server_vad or semantic_vad (only supported by qwen3.5-omni-realtime series model).
            "type": "server_vad",
            "threshold": 0.1,
            "prefix_padding_ms": 500,
            "silence_duration_ms": 900,
            "create_response": true,
            "interrupt_response": true
        },
        "enable_search": true,
        "search_options": {
            "enable_source": true
        },
        "tools": [
            {
                "type": "function",
                "function": {
                    "name": "get_current_weather",
                    "description": "Useful for querying the weather in a specific city.",
                    "parameters": {
                        "type": "object",
                        "properties": {
                            "location": {"type": "string", "description": "The city name"}
                        },
                        "required": ["location"]
                    }
                }
            }
        ],
        "temperature": 0.8,
        "max_response_output_token": "inf",
        "max_tokens": 16384,
        "repetition_penalty": 1.05,
        "presence_penalty": 0.0,
        "top_k": 50,
        "top_p": 1.0,
        "seed":-1
    }
}

input_audio_buffer.speech_started

In VAD mode, returned when the server detects speech onset in the audio buffer.

May be triggered each time audio is added to the buffer before speech is detected.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always input_audio_buffer.speech_started.

audio_start_msinteger

Time (ms) from when audio buffer writing starts until speech is first detected.

item_idstring

ID of the user message item created when end-of-speech is detected.

User message items append user input to the conversation history for model inference.

{
    "event_id": "event_Pvp8nEhsQuGCQbFJ9x58n",
    "type": "input_audio_buffer.speech_started",
    "audio_start_ms": 3647,
    "item_id": "item_YbAiGvK2H7YaS34o4R6Ba"
}

input_audio_buffer.speech_stopped

In VAD mode, returned when the server detects end-of-speech in the audio buffer.

Also returns a conversation.item.created event with the corresponding user message item.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always input_audio_buffer.speech_stopped.

audio_end_msinteger

Time (ms) from session start until end-of-speech is detected.

item_idstring

The ID of the user message item that will be created.

{
    "event_id": "event_UhQiqNVRsgUiq4KUS5Xb5",
    "type": "input_audio_buffer.speech_stopped",
    "audio_end_ms": 4453,
    "item_id": "item_YbAiGvK2H7YaS34o4R6Ba"
}

input_audio_buffer.committed

Returned when the input audio buffer is committed.

  • In VAD mode, the server automatically commits the buffer when it detects end-of-speech.
  • In Manual mode, returned after the client sends an input_audio_buffer.commit event.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always input_audio_buffer.committed.

item_idstring

The ID of the user message item that will be created.

{
    "event_id": "event_Iy6sUzL1nmdFgshFYxJEz",
    "type": "input_audio_buffer.committed",
    "item_id": "item_YbAiGvK2H7YaS34o4R6Ba"
}

input_audio_buffer.cleared

Returned after the client sends an input_audio_buffer.clear event.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always input_audio_buffer.cleared.

{
  "event_id": "event_RoUu4T8yExPMI37GKwaOC",
  "type": "input_audio_buffer.cleared"
}

conversation.item.created

Returned when a conversation item is created.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always conversation.item.created.

itemobject

The conversation item to add.

Properties

idstring

The unique ID of the conversation item.

objectstring

This value is always realtime.item.

statusstring

The status of the conversation item.

rolestring

The role of the message.

contentarray

The content of the message. This parameter is returned when the type is message.

typestring

The type of the conversation item. Valid values are message or function_call.

namestring

The name of the function that is called when the type is function_call.

call_idstring

When the type is function_call, this is the unique ID of the function invocation.

argumentsstring

When the type is function_call, this parameter contains the arguments for the function invocation as a JSON string.

{
    "event_id": "event_JEfkrr9gO3Ny7Xcv9bGVd",
    "type": "conversation.item.created",
    "item": {
        "id": "item_YbAiGvK2H7YaS34o4R6Ba",
        "object": "realtime.item",
        "type": "message",
        "status": "in_progress",
        "role": "assistant",
        "content": [
            {
                "type": "input_audio"
            }
        ]
    }
}
// Tool calling scenario
{
    "event_id": "event_S1hkaIQgcuQD8OEdOpGHQ",
    "type": "conversation.item.created",
    "item": {
        "id": "item_FEG9qJGNkPcdf4et3p7BV",
        "object": "realtime.item",
        "type": "function_call",
        "status": "in_progress",
        "call_id": "call_bc0a7fb7235840f69ecfe4",
        "name": "get_current_weather",
        "arguments": ""
    }
}

conversation.item.input_audio_transcription.delta

Sent frequently while the user is speaking when input audio transcription is enabled. Provides real-time intermediate transcription results. Concatenate text + stash for the most complete sentence preview at any point.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always conversation.item.input_audio_transcription.delta.

item_idstring

The ID of the associated conversation item.

content_indexinteger

The index of the content part that contains the audio.

textstring

Confirmed text prefix — the portion the model has finalized and will not change.

stashstring

Preliminary text suffix — a temporary draft following the confirmed portion, subject to revision.

languagestring

The detected language of the recognized audio.

emotionstring

The detected emotion of the recognized audio. Valid values: neutral, happy, sad, angry, surprised, disgusted, fearful.

{
    "event_id": "event_C7jzoeSFuiwOZS6tR14yx",
    "type": "conversation.item.input_audio_transcription.delta",
    "item_id": "item_ThVYhLHOdeXb4bBSvzSFF",
    "content_index": 0,
    "text": "",
    "stash": "How is the weather today?",
    "language": "en",
    "emotion": "neutral",
    "obfuscation": "ABEXGYmxdmc97u"
}

To get the most complete sentence preview at any moment, concatenate these two fields: real-time preview = text + stash.

Click to view example

Suppose the user is saying: "The weather is nice today, sunny and warm."

The following shows the event stream you might receive and how to interpret them:

Time

User speech progress

API response (text and stash)

Client UI display (text + stash)

T1

"The weather..."

text: ""

stash: "The weather"

The weather

T2

"...is nice..."

text: ""

stash: "The weather is nice"

The weather is nice

T3

"...today,"

text: "The weather"

stash: " is nice today,"

The weather is nice today,

("The weather" has been confirmed and moved to text)

T4

(brief pause)

text: "The weather is nice today, "

stash: ""

The weather is nice today,

(first clause fully confirmed)

T5

"sunny..."

text: "The weather is nice today, "

stash: "sunny"

The weather is nice today, sunny

T6

"...and warm."

text: "The weather is nice today, "

stash: "sunny and warm."

The weather is nice today, sunny and warm.

T7

(stops speaking)

-

Use the transcript from conversation.item.input_audio_transcription.completed as the final result.

conversation.item.input_audio_transcription.completed

Indicates that the user's audio has been transcribed by the built-in speech recognition model (qwen3-asr-flash-realtime). Not configurable.

The transcribed text from the speech recognition model may differ from the interpretation generated by the Qwen-Omni-Realtime model. The transcription is for reference only.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always conversation.item.input_audio_transcription.completed.

item_idstring

The ID of the user message item.

content_indexinteger

This value is always 0.

transcriptstring

The transcribed text.

{
    "event_id": "event_FrrZcxiDfTB9LD9p4pVng",
    "type": "conversation.item.input_audio_transcription.completed",
    "item_id": "item_YbAiGvK2H7YaS34o4R6Ba",
    "content_index": 0,
    "transcript": "Hello."
}

conversation.item.input_audio_transcription.failed

Returned when input audio transcription is enabled and the transcription fails. Independent of the error event; helps clients identify transcription failures specifically.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always conversation.item.input_audio_transcription.failed.

item_idstring

The ID of the user message item.

content_indexinteger

This value is always 0.

errorobject

The error information.

Properties

code string

The error code.

message string

The error message.

param string

The parameter related to the error.

{
  "type": "conversation.item.input_audio_transcription.failed",
  "item_id": "<item_id>",
  "content_index": 0,
  "error": {
    "code": "<code>",
    "message": "<message>",
    "param": "<param>"
  }
}

response.created

Returned when the server starts generating a new response.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always response.created.

responseobject

The response object.

Properties

id string

The unique ID of the response.

conversation_id string

The unique ID of the current session.

object string

The object type. For this event, this value is always realtime.response.

status string

The response status. Valid values are completed, failed, in_progress, or incomplete.

modalities array

The response modalities.

voice string

The voice for model-generated audio.

output array

This field is empty for this event.

{
    "event_id": "event_XuDavMzQN3KKepqGu3KRh",
    "type": "response.created",
    "response": {
        "id": "resp_HaVOPdbmX6vifiV5pAfJY",
        "object": "realtime.response",
        "conversation_id": "conv_FjJaccpnvwHNo9cPVuzGc",
        "status": "in_progress",
        "modalities": [
            "text",
            "audio"
        ],
        "voice": "Cherry",
        "output_audio_format": "pcm",
        "output": []
    }
}

response.done

Returned after the response is fully generated. The response object includes all output items except raw audio data.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always response.done.

responseobject

The response object.

Properties

id string

The unique ID of the response.

conversation_id string

The unique ID of the current session.

object string

The object type. For this event, this value is always realtime.response.

status string

The response status.

modalities array

The response modalities.

voice string

The voice for model-generated audio.

output object

The response output.

Properties

id string

The ID of the response output.

type string

The type of the output item. Valid values are message or function_call.

object string

The output item object type. This value is always realtime.item.

status string

The output item status.

role string

The output item role.

content array

The content of the output item. This field is returned only when the type is message.

Properties

type string

The content type. The value can be text for plain text output or audio for audio output.

text string

The text output.

transcript string

The text transcript of the audio.

name string

The name of the function that is invoked when the type is function_call.

call_id string

When the type is function_call, this is the unique ID of the function invocation.

arguments string

When the type is function_call, this field contains the full arguments for the function call as a JSON string.

usage object

Token usage details for this response.

Properties

total_tokens integer

Total tokens used in this response.

input_tokens integer

Number of input tokens.

output_tokens integer

Number of output tokens.

input_tokens_details object

Details about input token usage, including text_tokens and audio_tokens.

output_tokens_details object

Details about output token usage, including text_tokens and audio_tokens.

plugins object (optional)

Plugin usage metrics. Returned when web search (enable_search) is enabled.

Properties

search object

Search metering data.

Properties

count integer

The number of searches.

strategy string

The search strategy.

{
    "event_id": "event_CSaxRRYLvbrfexDXAEuDG",
    "type": "response.done",
    "response": {
        "id": "resp_HaVOPdbmX6vifiV5pAfJY",
        "object": "realtime.response",
        "conversation_id": "conv_FjJaccpnvwHNo9cPVuzGc",
        "status": "completed",
        "modalities": [
            "text",
            "audio"
        ],
        "voice": "Cherry",
        "output_audio_format": "pcm",
        "output": [
            {
                "id": "item_Ls6MtCUWO7LM4E59QziNv",
                "object": "realtime.item",
                "type": "message",
                "status": "completed",
                "role": "assistant",
                "content": [
                    {
                        "type": "audio",
                        "transcript": "Hello! How can I help you?"
                    }
                ]
            }
        ],
        "usage": {
            "total_tokens": 377,
            "input_tokens": 336,
            "output_tokens": 41,
            "input_tokens_details": {
                "text_tokens": 228,
                "audio_tokens": 108
            },
            "output_tokens_details": {
                "text_tokens": 9,
                "audio_tokens": 32
            },
            "plugins": {
                "search": {
                    "count": 1,
                    "strategy": "agent"
                }
            }
        }
    }
}
// Tool calling scenario
{
    "event_id": "event_T1EFAJp43X2DWtDRmxTtx",
    "type": "response.done",
    "response": {
        "id": "resp_TucN5QgymL5MA8vkJvFlS",
        "object": "realtime.response",
        "conversation_id": "conv_SEDZESRlefT8WvLSmEn6E",
        "status": "completed",
        "modalities": ["text", "audio"],
        "voice": "Ethan",
        "output_audio_format": "pcm",
        "output": [
            {
                "id": "item_FEG9qJGNkPcdf4et3p7BV",
                "object": "realtime.item",
                "type": "function_call",
                "status": "completed",
                "call_id": "call_bc0a7fb7235840f69ecfe4",
                "name": "get_current_weather",
                "arguments": " {\"location\": \"Hangzhou\"}"
            }
        ],
        "usage": {
            "total_tokens": 567,
            "input_tokens": 524,
            "output_tokens": 43,
            "input_tokens_details": {
                "text_tokens": 487,
                "audio_tokens": 37
            },
            "output_tokens_details": {
                "text_tokens": 43
            }
        }
    }
}

response.text.delta

Returned when the output modality is text-only and the model generates new text incrementally.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always response.text.delta.

deltastring

Incremental text generated by the model.

response_idstring

The response ID.

item_idstring

The message item ID.

output_indexinteger

The index of the output item in the response. This value is always 0.

content_indexinteger

The index of the internal part within the output item. This value is always 0.

{
    "delta": "Hello",
    "event_id": "event_TH49MauuPmRo1RGaMSlP7",
    "type": "response.text.delta",
    "response_id": "resp_PrRSvPVpnCExdUOGHHLuP",
    "item_id": "item_L8IRm9kRXFpxoOjDqDC96",
    "output_index": 0,
    "content_index": 0
}

response.text.done

Returned when the output modality is text-only and the model finishes generating text.

Also returned if the response is interrupted, incomplete, or canceled.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always response.text.done.

response_idstring

The response ID.

item_idstring

The message item ID.

output_indexinteger

The index of the output item in the response.

content_indexinteger

The index of the output item in the response.

text string

The full text generated by the model.

{
  "event_id": "event_B1lIeE2Nac33zn5V7h2mm",
  "type": "response.text.done",
  "response_id": "resp_B1lIdtjF4Noqpn5NOjznj",
  "item_id": "item_B1lIdJsAJlJiFs8ztWpJt",
  "output_index": 0,
  "content_index": 0,
  "text": "How can I assist you today?"
}

response.audio.delta

Returned when the output modality includes audio and the model generates new audio data incrementally.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always response.audio.delta.

response_idstring

The response ID.

item_idstring

The message item ID.

output_indexinteger

The index of the output item in the response.

content_indexinteger

The index of the output item in the response.

delta string

Incremental audio data, Base64-encoded.

{
  "event_id": "event_B1osWMZBtrEQbiIwW0qHQ",
  "type": "response.audio.delta",
  "response_id": "resp_P79OOMs8LnrXVpiIHUCKR",
  "item_id": "item_OFaPGtzfWCPyGzxnuEX9i",
  "output_index": 0,
  "content_index": 0,
  "delta": "{base64 audio}"
}

response.audio.done

Returned when the output modality includes audio and the model finishes generating audio data.

Also returned if the response is interrupted, incomplete, or canceled.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always response.audio.done.

response_idstring

The response ID.

item_idstring

The message item ID.

output_indexinteger

The index of the output item in the response.

content_indexinteger

The index of the output item in the response.

{
    "event_id": "event_Le1TDl7VfyHQxl47DtGxI",
    "type": "response.audio.done",
    "response_id": "resp_HaVOPdbmX6vifiV5pAfJY",
    "item_id": "item_Ls6MtCUWO7LM4E59QziNv",
    "output_index": 0,
    "content_index": 0
}

response.audio_transcript.delta

Returned when the output modality includes audio and the model generates new response.audio_transcript.delta transcript text incrementally.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always response.audio_transcript.delta.

response_idstring

The response ID.

item_idstring

The message item ID.

output_indexinteger

The index of the output item in the response.

content_indexinteger

The index of the output item in the response.

deltastring

The incremental text.

{
    "event_id": "event_BksW7fOwnyavZdDxIzZYM",
    "type": "response.audio_transcript.delta",
    "response_id": "resp_HaVOPdbmX6vifiV5pAfJY",
    "item_id": "item_Ls6MtCUWO7LM4E59QziNv",
    "output_index": 0,
    "content_index": 0,
    "delta": "What"
}

response.audio_transcript.done

Returned as a response.audio_transcript.done event when the output modality includes audio and the model completes the audio transcript.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always response.audio_transcript.done.

response_idstring

The response ID.

item_idstring

The message item ID.

output_indexinteger

The index of the output item in the response.

content_indexinteger

The index of the output item in the response.

transcriptstring

The full transcription text.

{
    "event_id": "event_X49tL2WerT4WjxcmH16lS",
    "type": "response.audio_transcript.done",
    "response_id": "resp_HaVOPdbmX6vifiV5pAfJY",
    "item_id": "item_Ls6MtCUWO7LM4E59QziNv",
    "output_index": 0,
    "content_index": 0,
    "transcript": "Hello! How can I help you?"
}

response.function_call_arguments.delta

Returned as the model streams function call arguments. Concatenate the delta fields in order to build the argument string. The complete content is provided in the subsequent response.function_call_arguments.done event.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always response.function_call_arguments.delta.

response_idstring

The response ID.

item_idstring

The message item ID.

output_indexinteger

The index of the output item in the response.

call_idstring

The unique ID for this function invocation. This is consistent with the done event in the same turn.

deltastring

New segment of the argument string. Concatenate segments in order.

{
    "event_id": "event_SlKoJyEbPEqLq14DSM1u5",
    "type": "response.function_call_arguments.delta",
    "response_id": "resp_JnTOsWXlFhKcFohZbtfz6",
    "item_id": "item_Rhcms7CauTNsQprV5S4Hr",
    "output_index": 0,
    "call_id": "call_2be200f4cafe419b9530dd",
    "delta": " {\"location\": \"Beijing\"}"
}

response.function_call_arguments.done

Indicates that function call arguments are fully generated. The arguments field contains the complete argument string. Use the arguments from this event — not the concatenated delta results — to parse and call the local function.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always response.function_call_arguments.done.

response_idstring

The response ID.

item_idstring

The message item ID.

output_indexinteger

The index of the output item in the response.

call_idstring

The unique ID for this function invocation.

namestring

The name of the function that was called.

argumentsstring

Complete function call arguments as a JSON string.

{
    "event_id": "event_X6suLyuL5agdH7r6koesM",
    "type": "response.function_call_arguments.done",
    "response_id": "resp_JnTOsWXlFhKcFohZbtfz6",
    "item_id": "item_Rhcms7CauTNsQprV5S4Hr",
    "output_index": 0,
    "name": "get_current_weather",
    "call_id": "call_2be200f4cafe419b9530dd",
    "arguments": " {\"location\": \"Beijing\"}"
}

response.output_item.added

Returned when a new item is created during response generation. The item type can be message or function_call.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always response.output_item.added.

response_idstring

The response ID.

output_indexinteger

The index of the output item in the response.

itemobject

Information about the output item.

Properties

idstring

The unique ID of the output item.

objectstring

This value is always realtime.item.

statusstring

The status of the output item.

rolestring

The role of the sender.

contentarray

The content of the message. This field is returned when the type is message.

typestring

The type of the output item. Valid values are message or function_call.

namestring

The name of the function to call when the type is function_call.

call_idstring

The unique ID of the current function invocation when the type is function_call.

argumentsstring

Function call arguments as a JSON string when the type is function_call. Initially an empty string in added events.

{
    "event_id": "event_DsCO341DEVtiATtCB6BUY",
    "type": "response.output_item.added",
    "response_id": "resp_HaVOPdbmX6vifiV5pAfJY",
    "output_index": 0,
    "item": {
        "id": "item_Ls6MtCUWO7LM4E59QziNv",
        "object": "realtime.item",
        "type": "message",
        "status": "in_progress",
        "role": "assistant",
        "content": []
    }
}
// Tool calling scenario
{
    "event_id": "event_HXmKt5pGoiRtXx7Hq7zpN",
    "type": "response.output_item.added",
    "response_id": "resp_TucN5QgymL5MA8vkJvFlS",
    "output_index": 0,
    "item": {
        "id": "item_FEG9qJGNkPcdf4et3p7BV",
        "object": "realtime.item",
        "type": "function_call",
        "status": "in_progress",
        "call_id": "call_bc0a7fb7235840f69ecfe4",
        "name": "get_current_weather",
        "arguments": ""
    }
}

response.output_item.done

Returned when an output item is fully generated.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always response.output_item.done.

response_idstring

The response ID.

output_indexinteger

The index of the output item in the response.

itemobject

The output item information.

Properties

idstring

The unique ID of the output item.

objectstring

This value is always realtime.item.

statusstring

The status of the output item.

rolestring

The role of the sender.

contentarray

The content of the message. This field is returned when the type is message.

typestring

The type of the output item. Valid values are message or function_call.

namestring

The name of the function that is called when the type is function_call.

call_idstring

When the type is function_call, this is the unique ID for the function invocation.

argumentsstring

When the type is function_call, contains the full function call arguments as a JSON string.

{
    "event_id": "event_MEu5nlLw1LsOguHiehIP8",
    "type": "response.output_item.done",
    "response_id": "resp_HaVOPdbmX6vifiV5pAfJY",
    "output_index": 0,
    "item": {
        "id": "item_Ls6MtCUWO7LM4E59QziNv",
        "object": "realtime.item",
        "type": "message",
        "status": "completed",
        "role": "assistant",
        "content": [
            {
                "type": "audio",
                "text": "Hello! How can I help you?"
            }
        ]
    }
}
// Tool calling scenario
{
    "event_id": "event_FHspdfAnCyjuME3mmAwSY",
    "type": "response.output_item.done",
    "response_id": "resp_TucN5QgymL5MA8vkJvFlS",
    "output_index": 0,
    "item": {
        "id": "item_FEG9qJGNkPcdf4et3p7BV",
        "object": "realtime.item",
        "type": "function_call",
        "status": "completed",
        "call_id": "call_bc0a7fb7235840f69ecfe4",
        "name": "get_current_weather",
        "arguments": " {\"location\": \"Hangzhou\"}"
    }
}

response.content_part.added

Returned when a new content part is added to an assistant message item during response generation.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always response.content_part.added.

response_idstring

The response ID.

item_idstring

The message item ID.

output_indexinteger

The index of the output item in the response. This value is always 0.

content_indexinteger

The index of the internal part within the output item. This value is always 0.

partobject

The output item information.

Properties

typestring

The type of the content part.

textstring

The text of the content part.

{
    "event_id": "event_AVBOmrgY3C8bjlRajfSUT",
    "type": "response.content_part.added",
    "response_id": "resp_HaVOPdbmX6vifiV5pAfJY",
    "item_id": "item_Ls6MtCUWO7LM4E59QziNv",
    "output_index": 0,
    "content_index": 0,
    "part": {
        "type": "audio",
        "text": ""
    }
}

response.content_part.done

Returned when streaming of a content part within an assistant message item finishes.

event_idstring

A unique identifier for this event.

typestring

The event type. This value is always response.content_part.done.

response_idstring

The response ID.

item_idstring

The message item ID.

output_indexinteger

The index of the output item in the response. This value is always 0.

content_indexinteger

The index of the content part in the content array. This value is always 0.

partobject

The output item information.

Properties

typestring

The type of the content part.

textstring

The text of the content part.

{
    "event_id": "event_Il8HD19v58Qr5IBkw7LtN",
    "type": "response.content_part.done",
    "response_id": "resp_HaVOPdbmX6vifiV5pAfJY",
    "item_id": "item_Ls6MtCUWO7LM4E59QziNv",
    "output_index": 0,
    "content_index": 0,
    "part": {
        "type": "audio",
        "text": "Hello! How can I help you?"
    }
}