Claude · Schema

Message

A message response from Claude.

Artificial IntelligenceChatbotConversational AIGenerative AILarge Language ModelsMachine LearningNatural Language Processing

Properties

Name	Type	Description
id	string	Unique object identifier for the message.
type	string	Object type. Always "message" for message responses.
role	string	Conversational role of the generated message. Always "assistant".
content	array	Content generated by the model. Array of content blocks, each of which has a type that determines its shape.
model	string	The model that handled the request.
stop_reason	string	The reason the model stopped generating tokens.
stop_sequence	string	The stop sequence that caused the model to stop, if applicable. Null if the model stopped for another reason.

View JSON Schema on GitHub

JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Message",
  "type": "object",
  "description": "A message response from Claude.",
  "properties": {
    "id": {
      "type": "string",
      "description": "Unique object identifier for the message."
    },
    "type": {
      "type": "string",
      "description": "Object type. Always \"message\" for message responses."
    },
    "role": {
      "type": "string",
      "description": "Conversational role of the generated message. Always \"assistant\"."
    },
    "content": {
      "type": "array",
      "description": "Content generated by the model. Array of content blocks, each of which has a type that determines its shape."
    },
    "model": {
      "type": "string",
      "description": "The model that handled the request."
    },
    "stop_reason": {
      "type": "string",
      "description": "The reason the model stopped generating tokens."
    },
    "stop_sequence": {
      "type": "string",
      "description": "The stop sequence that caused the model to stop, if applicable. Null if the model stopped for another reason."
    }
  }
}