Implementation:Cohere ai Cohere python AssistantMessageResponseContentItem Model

Knowledge Sources	Cohere Python SDK
Domains	SDK, Chat
Last Updated	2026-02-15 14:00 GMT

Overview

The AssistantMessageResponseContentItem is a discriminated union type representing individual content items in an assistant message response, which can be either text or thinking content.

Description

AssistantMessageResponseContentItem is a type alias defined as an annotated union of two Pydantic model classes: TextAssistantMessageResponseContentItem and ThinkingAssistantMessageResponseContentItem. The union is discriminated on the type field. The TextAssistantMessageResponseContentItem variant has type="text" and a text string field containing the generated text. The ThinkingAssistantMessageResponseContentItem variant has type="thinking" and a thinking string field containing the model's internal reasoning. Both variants extend UncheckedBaseModel and are auto-generated from the Cohere API definition by Fern.

Usage

Use this type when iterating over the content list of an AssistantMessageResponse. Each item in the list is an instance of one of the two variants, and the type field can be used to determine which variant is present and access the appropriate content field.

Code Reference

Source Location

• Repository: Cohere Python SDK
• File: src/cohere/types/assistant_message_response_content_item.py

Signature

class TextAssistantMessageResponseContentItem(UncheckedBaseModel):
    type: typing.Literal["text"] = "text"
    text: str

class ThinkingAssistantMessageResponseContentItem(UncheckedBaseModel):
    type: typing.Literal["thinking"] = "thinking"
    thinking: str

AssistantMessageResponseContentItem = typing_extensions.Annotated[
    typing.Union[
        TextAssistantMessageResponseContentItem,
        ThinkingAssistantMessageResponseContentItem,
    ],
    UnionMetadata(discriminant="type"),
]

Import

from cohere.types import AssistantMessageResponseContentItem
from cohere.types.assistant_message_response_content_item import (
    TextAssistantMessageResponseContentItem,
    ThinkingAssistantMessageResponseContentItem,
)

I/O Contract

TextAssistantMessageResponseContentItem

Field	Type	Required	Default	Description
type	Literal["text"]	No	"text"	Discriminant field identifying this as a text content item.
text	str	Yes	-	The text content generated by the assistant.

ThinkingAssistantMessageResponseContentItem

Field	Type	Required	Default	Description
type	Literal["thinking"]	No	"thinking"	Discriminant field identifying this as a thinking content item.
thinking	str	Yes	-	The internal reasoning or thought process of the assistant.

Usage Examples

import cohere

client = cohere.ClientV2(api_key="YOUR_API_KEY")

response = client.chat(
    model="command-r-plus",
    messages=[
        {"role": "user", "content": "What is 25 * 43?"},
    ],
)

# Process content items from the assistant message response
if response.message.content:
    for item in response.message.content:
        if item.type == "text":
            print(f"Assistant said: {item.text}")
        elif item.type == "thinking":
            print(f"Assistant thought: {item.thinking}")

# Construct content items manually
from cohere.types.assistant_message_response_content_item import (
    TextAssistantMessageResponseContentItem,
    ThinkingAssistantMessageResponseContentItem,
)

text_item = TextAssistantMessageResponseContentItem(text="The result is 1075.")
thinking_item = ThinkingAssistantMessageResponseContentItem(
    thinking="I need to multiply 25 by 43. 25 * 40 = 1000, 25 * 3 = 75, so 1075."
)

Related Pages

• Environment:Cohere_ai_Cohere_python_Python_SDK_Runtime